The Mass-Air Experts...

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> All of IST's products are built to the highest quality standards and are backed by our Incredible Warranty, which covers our products for as long as you own you vehicle. DON'T BE FOOLED by competitors who sell cheap imitations, inferior products, and only offer a limited warranty.

Air Adjuster!! - Our #1 Seller!! - Helps SAVE GAS!!

 - Our very first product and still our best seller!! IST was the first to recognize the air-fuel ratio adjustment problem, and the first to offer a solution way back in 1994!! The first DIGITAL ELECTRONIC solution that allows you to adjust your air-fuel ratio rich or lean, to accurately match the Mass-Air Flow Sensor calibration to your engine. The Air Adjuster!! gives you the adjustability over the air/fuel ratio that you don't currently have on late-model, computer-controlled engines. Eliminates rich/lean conditions, hunting/surging idle and drivability problems resulting from a mis-matched Mass-Air Flow Sensor signal. Large adjustment range allows easy dial-in of engine after modifications or change of injector size. Microprocessor controlled, correctly follows Mass-Air Flow Sensor response curve over entire range. Direct/Adjust toggle switch on the front of the unit allows you to quickly switch the input to the computer between the unmodified Mass-Air Flow Sensor signal and The Air Adjuster!! modified signal. Lean/Rich 18 turn adjustment screw allows precise air/fuel adjustability. Digital Signal Display is a bright green, 7-segment LED digital display which always shows you the Mass-Air Flow Sensor signal (in Volts). No more fumbling with multimeters and piercing wires to get a reading. The Air Adjuster!! is a precision, computer-controlled device built with military temperature-grade components, it is NOT simply an adjustable resistor. Here are some common problems the Air Adjuster!! will help you solve:

- Hunting/Surging Idle: This may be caused by a rich or lean condition. The computer has "tables" in its memory which allows it to adjust the air/fuel ratio according to all of the various engine sensor inputs. Whenever the computer runs into either end of the tables, it keeps attempting to compensate, but it can't. This causes the hunting/surging condition. The reason for this is that the Mass-Air signal is no longer correct  for the modifications which have been done to the engine. The solution is the The Air Adjuster!!  While it won't smooth out a lumpy cam idle, it will allow your engine to run as smooth as possible.

- Stopping at a light and the idle "hangs" at 1200 - 2000 RPM: This is caused by a rich, gas-wasting condition. Usually it is accompanied by a rich smell from the exhaust. The idle may stay high or slowly drop back to normal, depending on how rich it is. The Air Adjuster!! will allow you restore the air/fuel ratio to normal, allowing the engine to return to idle normally.

- Black Tailpipe: This is caused by a rich, gas-wasting condition, same as condition above. Note: Virtually all speed-density banked-port Ford Trucks have a extremely black tailpipe due to the extremely inefficient banked (left bank - right bank) port firing order. An excellent reason to convert your Ford Truck to mass-air and get the Air Adjuster!! as well (see truck mass-air kits below).

- Rich (or "rotten egg" ) Exhaust Smell: This is caused by a rich, gas-wasting condition, same as conditions above.

- Stopping at a light and the engine dies: This is caused by a lean condition. Sometimes it is accompanied by a high engine temperature reading. The engine idle speed may drop and run very rough around 400 - 600 RPM, or it may cause the engine to die immediately, depending on how lean it is. The Air Adjuster!! will allow you restore the air/fuel ratio to normal, allowing the engine to return to idle normally.

- Surging while under light to moderate cruise: This is caused by a lean condition, same as condition above.

- Changing Injector Sizes: This can cause either a rich or lean condition. Going to a larger injector size will cause a rich condition, going to a smaller size will cause a lean condition. The Air Adjuster!! has enough adjustment to go up or down 2 injector sizes without having to re-calibrate or replace the mass-air sensor. For example, assume you have a mass-air sensor calibrated for 30 Lb injectors. With the Air Adjuster!!, you would be able to move up to 36 or 42 lb injectors, or down to 24 or 19 lb injectors simply by re-adjusting the Air Adjuster!! There is an approximate 0.12 - 0.15 difference in voltage for each injector size.

- If you own a aftermarket Mass-Air unit: From our experience, many of the aftermarket meters need some adjusting for your specific engine combination to get optimum performance. And since sending a meter back for re-calibration or change of injector size can be expensive, the Air Adjuster!! is the perfect solution!! Remember, you can go up or down 2 injector sizes from whatever your aftermarket meter is calibrated for now.

- If you have a Ford Racing B303 or E303 Cam: From our experience, virtually every engine with a Ford Racing B303 or E303 Cam runs way too rich due to the improved breathing/airflow through the engine. The Air Adjuster!! is the perfect solution!! You'll be able to dial your engine right in.

- If you have a long-tube headers: From our experience, almost all engines with long-tube headers run way too lean due to the improved airflow/exhaust through the engine. The Air Adjuster!! is the perfect solution!! Compensate for that too lean condition easily!!

The Air Adjuster!! is as simple to use as a screw adjustment on a carburetor!! Does not require any expensive diagnostic equipment to use!! Available for all 1986-current Ford-style Mass-Air Flow Sensors and warranted for as long as you own your vehicle!! Plus you'll find competent, friendly, and FREE technical support is provided for all of our products. We'll work with you to try and solve any problem you may encounter!!

Air Adjuster Dually!! - For DUAL Intake Systems!!

 - Now truly awesome DUAL MASS-AIR Systems are possible!! We combined our tremendously successful Air Adjuster!! with an advanced Dual Mass-Air Integrator into one unit. Now you can run two mass-air meters, each calibrated for the actual injector size (not half), and let the Air Adjuster Dually!! do the rest. The 2 input signals are correctly combined into one output for the computer, and the Air/Fuel Ratio is fully adjustable rich or lean with the built-in Air Adjuster!! And instead of just dividing by 2 and hoping for the best, the fully programmable divide factor lets you set the signal strength according to the type/size/brand of mass-air meter and engine size. This feature lets you adjust for a wide range of applications, from simple low-rpm dual mass-air 302’s, all the way up to hi-revving, massive dual-turbo 500+ inch big blocks. Finally, to prevent error codes and possible engine problems, the Dually’s output is limited so that it will never exceed 5 volts, no matter what each mass-air meter supplies into the unit. And like all of IST’s products, the new Dually!! is built with military temperature-grade electronics, is fully potted for vibration resistance, and is covered by our Incredible Warranty, which protects it for as long as you own your vehicle. So catch the next wave in awesome street engines, build a true DUAL MASS-AIR Engine System with the new Air Adjuster Dually!!

Digital TPS Monitor - Easy TPS Adjustment!!

 - The TPS sensor adjustment is a critical settings on Ford engines. You DID adjust your TPS to 0.98 volts with Key-ON-Engine-OFF, didn't you?? Well, our plug-in DIGITAL Monitor makes adjusting your TPS a breeze!! No more piercing wires!! Now includes both 3-pin round and 3-blade oval TPS connectors. Fits nearly all Ford TPS sensors, from 1986-95, except newer 3-pin oval 4.6L engines.

Mass-Air Harnesses - We've Sold More Than Anyone!!

 - IST has converted more cars to Mass-Air than anyone!! Over 20,000 harnesses and computer kits sold to date, with no end in sight!! If you want to convert a Speed Density engine to a Mass-Air engine, IST’s LOW-COST conversion harness is the answer. All harnesses designed for speed density Mustang, Thunderbird, Cougar, Mark VII, Crown Victoria, Grand Marquis, & Town Car. Will not work on trucks, see truck conversion kits. Why convert to Mass-Air in the first place?? Simple, on a totally stock car engine, you will generally pick up 2 - 3 MPG, along with much crisper throttle response. On modified engines, it's mandatory, since the stock Speed Density computer has a very small "window" of adjustment built in to handle those changes. Even if you have modified your stock engine and it still seems to run OK, you still are not getting the maximum benefit from all those expensive aftermarket parts you put on. Plus, you have the added benefit of cleaner emissions, since most Speed Density systems tend to run on the rich side. This true OEM-style and quality kit allows you to custom tailor the harness to the exact length you need. Plus you'll find competent, friendly, and FREE technical support is provided for all of our products. We'll work with you to try and solve any problem you may encounter!!

- If your car did not have cruise control from the factory, you will need this kit for a mass-air conversion in addition to the conversion harness or mass-air kit. The VSS sensor used for the factory cruise control systems is also required for a mass-air system. The system will run without it, however, you will not achieve maximum performance from the conversion. Why spend all that money doing the conversion and adding all of those performance parts, and not get the maximum power?? Get the VSS kit and do it right!!

OBD-I to OBD II Adapter - Use That OBD-II Mass-Air Unit!!

 - Have a newer rectangular 4 or 6-pin OBD-II style Mass-Air unit that you want to use on an older vehicle with the 4-pin oval OBD-I style connector?? No problem, just use our plug-in adapter!! This harness solves compatibly problems so you can use the newer-style, improved-design Mass-Air units on your OBD-I vehicle. The OBD-II connector has 4 wires, order optional 6-wire kit if you are using the internal ACT sensor on the Mass-Air unit. Note: 6-wire kit contains 2 wires to make a 4-wire connector a 6-wire connector.

OBD-I : 1988 - 1995 (4-wire oval)

OBD-II Gen 1 : 1994 - 2004 (4 or 6-wire rectangular)

OBD-II Gen 2: 2005 - current (6-wire mini rectangular)

OBD II Connector - New Repair Harness!!

 - Have a newer rectangular 4 or 6-pin OBD-II style Mass-Air connector that needs replacement?? We now have OEM repair connectors with approx 8" of 16 gauge wire already attached. Works on all 94-up OBD-II Mass-Air sensors, with either 4 or 6 wires. Other companies charge $20 - $25 for this repair connector, buy it here and have enough money left over for lunch!!

Mass-Air Meters/Sensors - We've Got NEW Ones!!

 - Ford no longer sells new 55 mm 1989-93 Mustang 5.0L Mass-Air sensors, they only sell remanufactured units for over $170.00 each with a core unit required!! Well, IST has searched the country and purchased a limited number of BRAND NEW take-off Mass-Air Sensors!! They are available 2 ways: as a complete unit (shown on right) for people doing mass-air conversions, or the sensor by itself (shown on left), for people needing a factory replacement or for those who need one for a C & L Mass-Air meter housing.........But remember, quantities are limited, and when they're gone, they're gone!! We may not be able to get any more at any price!! So if your sensor is bad and your gas mileage has gone way down, buy one of these crazy-cheap sensors now!! We also offer larger C & L mass-air meters, available with or without sensors.

Extension Harnesses

- If you’ve relocated your Mass-Air unit and the factory harness no longer reaches, IST’s new extension harness is for you!! This plug-in, OEM-style harness is available as a kit allowing you to custom tailor the harness to exactly the length you need, up to 7 feet long.

O2 Harnesses

-  Got those long tube header/O2 sensor blues?? As usual, IST solves the problem for you!!  This kit works on all 87-2004 cars or trucks with black, gray, white, blue, green, or purple factory connectors. This pair of plug-in, OEM-style harnesses is available as a kit allowing you to custom tailor the harness to the exact length you need, up to 4 feet long. For later Mustangs, it is available as a pair of 17" finished harnesses with black connectors, for most 99-04 Mustang aftermarket exhaust applications.

ACT Harness

- CoolPower!! ACT Temperature Sensor Relocation Kit - Is the hot intake manifold the right place to mount the EEC ACT Temperature Sensor?? Of course not!! The heat of the aluminum intake manifold influences the sensor temperature as the engine warms up, resulting in the sensor not reading the true incoming air temperature. Our new kit relocates the sensor to the air box where it should be to read the true air temperature, resulting in better drivability, better engine temperature stability, and more POWER to your rear wheels.

EEC-IV Connectors

 - IST has bought out the inventory of a bankrupt harness manufacturer that made harnesses for Ford. We now have THOUSANDS of the much requested EEC-IV Computer Connectors IN STOCK!! These connectors are available 2 ways – as a bare connector shell for people who need replacements for existing harnesses, or as a complete assembly for those who want to make their own harnesses. These connectors have been obsolete from Ford for some time now, and we have received endless requests for these connectors, as the small tangs that lock each terminal in the connector break off over time, causing the terminal to back out of the connector, creating an open circuit. These connectors fit virtually ALL EEC-IV computers, including Mustangs, F150, Bronco, Thunderbird, Cougar, Crown Victoria, Grand Marquis, Town Car, Taurus, Sable, Ranger, etc. in the 1985-95 year range (year dependant for specific models). Since we bought so many, we are offering UNHEARD OF LOW pricing. So order them now, because when they are gone, they’re gone!!

EEC-IV Gaskets

 - IST now has the impossible to find silicone gaskets for the 60 pin EEC-IV computer connectors!! You know how these gaskets are almost always damaged or missing entirely. Replacing this gasket will help keep you computer connector totally waterproof!! These OEM gaskets fit virtually ALL 60-pin EEC-IV computers, including Mustangs, F150, Bronco, Thunderbird, Cougar, Crown Victoria, Grand Marquis, Town Car, Taurus, Sable, Ranger, etc. in the 1985-95 year range (year dependant for specific models).

EEC-IV Extension Harness - Previously Impossible to Find!!

 - Finally!! IST now has male-female extension harnesses for the 60 pin EEC-IV or 104 pin EEC-V computer systems!! After years of customer requests, IST now manufactures these harnesses so you don't have to cut your original harness if you need extra length!! These OEM quality harnesses fit virtually ALL 60-pin EEC-IV or 104 pin EEC-V computers, including Mustangs, F150, Bronco, Thunderbird, Cougar, Crown Victoria, Grand Marquis, Town Car, Taurus, Sable, Ranger, etc. in the 1985-95 year range (year dependant for specific models). Also great for custom engine swaps and kit cars!! All 60 or 104 pins are extended to insure complete compatibility.

EEC-IV Harnesses

- Main Harness -  Main computer harness for 87-93 style Mustangs or custom applications. Replace that melted or damaged original harness with a brand new one!! We also have most connectors on this harness available as individual replacements.

- Injector Harness -  Replacement factory fuel injector harness for 87-93 style Mustangs. Replace that melted or damaged original harness with a brand new one!!  We also have most connectors on this harness available as individual replacements.

- Factory O2 Harness -  Replacement factory O2 harness for 87-93 style Mustangs. Replace that melted or damaged original harness with a brand new one!!  We also have most connectors on this harness available as individual replacements.

Intake Ducting - Keep It Smooth!!

 - NEW!! IST now offers both rubber and silicone connectors and elbows as well as steel and aluminum tubing for those wanting to fabricate their own custom intake systems!! We currently are stocking 90 degree elbows as well as straight connectors (both straight and with bellows). We also offer thin wall, high-strength steel and aluminum tubing, sold by the foot. All are available in sizes from 2.5" through 4". Great for Turbo Chargers, Superchargers, and custom vehicles!! No more searching for and modifying stock OEM hoses, which don't look nearly as good anyway. Tubing may be painted, power-coated, or chromed for that show winning finish. Size-matched stainless steel hose clamps also available.

Car Mass-Air Kits - Do it RIGHT the First Time With IST!!

 - Complete Car Mass-Air Conversion Kits - Every part you need to convert a Speed Density engine to a Mass-Air engine. Complete kits include engine computer, mass-air meter, hoses, conversion harness, wiring diagram and instructions. All kits designed for speed density Mustang, Thunderbird, Cougar, Mark VII, Crown Victoria, Grand Marquis, & Town Car. Non-EFI kit 460 kit designed for universal applications. On a totally stock car engine, you will generally pick up 2 - 3 MPG, along with much crisper throttle response. On modified engines, it's mandatory, since the stock Speed Density computer has a very small "window" of adjustment built in to handle those changes. Basic kits all start with a 55 mm stock type mass-air meter calibrated for 19 lb injectors only. Larger 73, 76, & 80 mm kits can be calibrated for almost any injector size. 460 kits come with either 80 mm C & L meter or stock Ford 80 mm meter with good looking "Ford" logo airbox (your choice). All kits can be further customized as needed, including injectors, wiring, etc. inquire when ordering. We strongly recommend the Air Adjuster!! with these kits for total air/fuel control, especially for heavily modified engines, all 351, and all stroker engines. We've sold more conversion kits and harnesses than anyone, so come to the experts when your ready to do your conversion. Plus you'll find competent, friendly, and FREE technical support is provided for all of our products. We'll work with you to try and solve any problem you may encounter!! Please note that the above picture is GENERIC and may not represent what is actually contained in each kit.

Truck Mass-Air Kits - NOBODY Offers More Truck Kits!!

         >> IST helps you get the job DONE RIGHT!!

  - Complete Truck Mass-Air Conversion Kits - Every part you need to convert a Banked Port, Speed Density engine to a Mass-Air engine. Complete kits include engine computer, mass-air meter, hoses, injector, O2 & mass-air conversion harness, and instructions. All kits designed for banked port, speed density Ford trucks. The Ford truck banked port systems do not fire the injectors sequentially, they simply fire left bank - right bank. As you can see, this is just a small step above carburetors and a very inefficient fuel injection system. Converting to sequential Mass-Air on a totally stock truck engine, you will generally pick up 2 - 4 MPG, along with much crisper throttle response. On modified engines, it's mandatory, since the banked port speed density computer has virtually NO "window" of adjustment built in to handle those changes. Typical conversions on totally stock engines generally pick up 2 - 4 MPG due to the improved fuel control of sequential injection!! Not bad considering today's gas prices!! Non-EFI and 460 kits designed for universal applications. Basic kits all start with a 55 mm stock type mass-air meter calibrated for 19 lb injectors only. Larger 73, 76, & 80 mm kits can be calibrated for almost any injector size. 460 kits come with either 80 mm C & L meter or optional stock Ford 80 mm meter with good looking "Ford" logo airbox (your choice). All kits can be further customized as needed, including injectors, wiring, etc. inquire when ordering. And for total air/fuel control, especially for heavily modified engines and all stroker engines, the Air Adjuster!! is now included with all kits!! We've sold more conversion kits and harnesses than anyone, so come to the experts when your ready to do your conversion. Plus you'll find that competent, friendly, and FREE technical support is provided for all of our products. We'll work with you to try and solve any problem you may encounter!! Please note that the above picture is GENERIC and may not represent what is actually contained in each kit.

>> DON'T BE FOOLED BY OTHER "CHEAPER" KITS THAT DON'T DO THE CONVERSION CORRECTLY AND DON'T INCLUDE AN AIR ADJUSTER!! CALL US FOR DETAILS!!

Transmission Controller - Total Trans Control!!

- CoolPower!! Stand-Alone 4R100, E4OD, AODE, 4R70W Controller – Now with just a laptop or a desktop PC you can totally control the operation of your electronic transmission. Program every upshift, downshift, line pressure and torque converter lockup. Make your transmission shift the way you want it to. Perfect for total control of your existing late model transmission, or for retrofitting an electronic transmission into a vehicle which didn't originally have one. Also has table select so you can have one profile for everyday driving, and one profile for the track or towing. Windows-based software and 9-pin interface cable included.

130 EZ-Amp Alternator Harness - We make More Amps EASY!!

- CoolPower!! 130/200 Amp Alternator Installation Harness – When switching to a higher amperage alternator than what your vehicle originally came with, its extremely important to upgrade the harness as well. If you don't upgrade the harness, it is likely you will have an underhood fire at some point. Our new harness makes it super easy - one end bolts to the starter solenoid, the other end bolts to and plugs into the new alternator. Only a single wire needs to be connected to the existing vehicle harness (the green w/red stripe wire). This harness contains the correct 4 gauge wire and the correct gauge fusible links to protect you vehicle.

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