Hi !! 92 Corvette, ECM 16159278..........

[Ponsonby Britt]

I'm having computer, ECM, problems with by beloved 1992 Covette, LT1. (ECM 16159278)

I bought it new, it began to have ECM problems about two years ago. I had the OptiSpark unit replaced, but now ECM "appears" to be dead.

When I switch it on, both fans turn on and the display flashes sys about every 20 seconds. I can't get coolant temp or oil temp (except from guages). But it
will crank every time, when cold and then dies when the engine warms up.

On rare occasions the ECM works perfectly until the engine gets hot and then the engine dies and you have to wait a while until it cools to restart.

I built my own device to read the serial data, but I can't make heads or tails of it.

When I removed the ECM and applied power, I get nothing at all on the serial pins.

[dave w]

:welcome:

Perhaps SIA Electronics can help? http://siaelec.com/product/16159278-92-93-corvette-ecm-ecu-repair-return/

SIA Electronics is the largest remanufacture of anti-lock brakes systems in the industry. SIA was established in 1990 with a goal to provide quality remanufactured G.M ECM’s. We quickly recognized the need for Ford, Chrysler, and import ECM’s. Expanding our ECM line to all foreign and domestic modules. In 1994 we expanded our product line to a full line of Anti-lock brake systems & Mass airflow sensors.

SIA offers flash reprogramming on late model ECM’s and offers a rebuild & return program for all product lines in which we do not stock. Send us your original unit and we will rebuild and return it in 1-3 business days.

We are located in Tilden, Illinois which is approximately 30 minutes from St. Louis, Missouri.

dave w