Fuel Injection Computer -- 88 5KSQ

Cody Forbes cody at 5000tq.com
Fri May 4 04:36:46 PDT 2012


Most of those things have nothing to do with the fuel injection computer.

The idle speed stabilizer has its own control unit and has no real relation to the fuel injection control unit. It has it's own temperature sensor and it's own wiring to the idle switch. The control unit is above the glove box.

The cold start valve gets power from elsewhere, the ECU only has control of the ground to it.

The mileage counter on the dash operated through the trip computer control unit. It gets signals from a sensor on the fuel metering plate for flow rate and a wire connects to the ignition coil for RPM signal (shared with the idle speed control unit btw).


The run-on I'll have to think about, but FYI the ECU has ZERO terminal 30 connections, only 15. It simply has no electricity supplied to make it function unless you have some other component shorted/failed that is giving the ECU power.

-Cody
(Sent from my phone, if a word doesn't fit blame Siri)

On May 4, 2012, at 4:22 AM, b1biker at aol.com wrote:

> I replaced my fuel injection computer with a used unit from Chris at Force Five. Initially it corrected some of the issues I had been having but after running for less than an hour all of the problems returned. Chris sent me another unit as a warranty item but before I install it I'd like to determine that there isn't something that is causing the computer to fail.
> 
> Here's a list of the symptoms that I have identified.
>   Idle speed stabilizer is not functioning
>   When key is switched off engine does not immediately stop (it used to)
>   No power to cold start valve
>   Mileage calculator on dash display does not function
> 
> With the original computer the first problem that I noticed was the idle speed stabilizer followed by the cold start valve issue; the last problem to surface was the mileage computer. The first replacement computer did not solve the cold start problem but did fix all of the other issues; it basically failed all at once.
> 
> Any help/advice will be greatly appreciated.
> Gary Meier
> 885KSQ -- 94 S4
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