Skip to main content
86-89 TPI PROM Programming Service
back add to cart

This is an economical service intended for stock or mild 1986-1989 TPI engines with ECM number 1227165. Fuel and spark advance tables are not modified, so there is no performance gain with this service as compared to stock. This service will not be useful for you if you have a stroker engine, supercharger or turbo, or a non-stock camshaft. Contact us if you have any questions about whether or not this service suits your needs.

You will not need to mail in your computer or current computer chip. We will program your settings onto an adapter that mounts between the factory prom and the ECM. This adapter will bypass the factory settings, and the ECM will run on the programmed settings instead. Please note that the factory prom must be mounted on the adapter for proper operation, and the factory prom is NOT included. You must use a factory prom that is originally from a 1986-1989 TPI application. If you have any doubts as to what its originally from, email us with the 4 letter code on the prom and we will try to find the original application.

Turn around time is typically 1-2 business days. We can work with a variety of settings commonly used for retrofit TPI applications as well as for TPI Camaros/Firebirds/Corvettes:

VATS    Enable/Disable
 EGR  Enable/Disable
 AIR (smog pump)  Enable/Disable
 Injector Size  Specify Size
 Fan On/Off Temperatures   Specify Desired Temperatures
 Speed Limiter  Specify Desired Speed
 RPM Limiter  Specify Desired RPM
 Cold Start Injector  Enable/Disable

Cold Start Injector:
GM used a cold start injector (also known as 9th injector) to provide extra fuel on cold starts on 85-88 models. In 1989, GM setup the PROM to add the extra fuel needed for cold starts, and eliminated the cold start injector. Eliminating the cold start injector is probably one of the most common changes needed on 86-89 proms. If you wish to have the cold start injector disabled, we will setup your adapter with the 1989 code, and make any needed changes on top of that. You will need to either A) disconnect the electrical connector to the cold start injector and leave everything in place, or B) physically remove the cold start injector from the runner and plug the runner hole with a cover plate. If you go with this method you will also need to plug the hole at the back of the fuel rail.

Items for which no change is specified will be left in stock form. We will also need the following information about your vehicle:

 Vehicle Year
 Transmission Type

We can start with either a Camaro or Corvette binary file as a baseline on which to make changes. If you have aluminum heads (Corvette engines had alum. heads from the factory), we suggest going with the Corvette baseline as it has more aggressive fuel/spark tables. We don't suggest using the Corvette baseline on an iron headed engine.

Depending on the regulations in your state, it may be illegal to disable emissions. We assume that any request to disable emissions means that the vehicle will be for off-road use only. We are responsible only for providing a prom that is correct with regards to the requirements given. TPI PARTS shall in no event be liable in contract or tort (including negligence) for special, indirect, incidental, or consequential damages, such as, but not limited to, loss of property damage, or any other damages, costs or expenses which might be claimed as the result of the use of our products and services.

The purchase of this service constitutes your agreement to the above terms.

Desired Changes
add to cart add to wishlist

70 Bama Lane
Clanton, AL 35045

Email us at

Copyright © 2005-2020 FBody Performance Inc.


Site Powered By
    BizStudio Site Manager
    Online web site design