I posted a thread yesterday about not getting any code 12's at all when in diagnostic mode, only a solid service light. I also get a solid service light whenever the car is running, stock chip or one of my "ghetto" prom jobby's.
Could somebody send me or atleast post some detailed procedures to see if my ecm is bad?
I'm trying to locate a comp locally that i can use to test in my car.

Brendan

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1987 IROC-Z L98 350 SuperRam, Edelbrock Performer 6085 Aluminum Heads, LPE RollerCam 219/219, Crane Gold Race 1.6RR, TF 1 pc Moly Pushrods, Underdrive Pulleys, Edelbrock TPI High Flow Base Manifold, Accel 58mm TB, ADS 24#, Crane AFPR, K&N, Edelbrock TES Headers, Catco Hi Flow Cat, 3" Borla Cat-Back, Accel Cap & Rotor, MSD 8.5mm, MSD 6AL Ignition, MSD Blaster 2 Ignition Coil, Hayes Clutch, 1LE Aluminum DS, 94' Z28 Disk Rear, Wilwood Adjustable Proportioning Valve, Torsen Series 3 Posi Carrier, Precision 3.73 Gears, Southside Machine Sub-Frame Connectors, Hotchkis Lower Control Arms, KYB Shocks/Struts, Suspension Techniques Lowering Springs, Polyurethan Bushings all over the place, Moog Upper/Lower Ball joints and Tie Rods ends/Idler Arm,

To see the ROC, Check out the webpage Here

 

Brendan,

I am not kidding when I say that the GM manual says to actual hit the ECM with a wooden stick. Seriously ... I am not kidding. Talk about a 'ghetto' test. I am not advising this ... I am only telling you what is in my manual.

Tim

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• Program your own PROMs!. Read my article to get started!
• Research and Experiment before asking questions.
• This is not a chip store. Go to the classifieds if you want someone to sell you a chip or give you a BIN.

TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's with bigger cam, bigger stall, and bigger exhaust.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

 

Please pardon my ignorance, but just what on earth is hitting the ECU with a wooden stick going to accomplish?

-Mark W.
'88 SC Camaro w/ 305 TBI

 

Ok,
Well i don't really have anything to lose!
I'll give the whack a try. I mean, its about all thats left at this point, thanks Tim.

Brendan

 

It does wonders. Didn't you see the crazy cosmonaut in Armageddon? It worked for him.

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1989 IROC-Z 5.7L

 

Hitting it checks for loose connections. Haven't you heard about the tap test for MAF's also? Light tap with a screwdriver - if symptoms change MAF is bad.

 

The only accurate test is on an ecm bench, and they can miss one once in a while

Best to get a spare, that you know is good. To late now, but I'd try another one, and just see what happens.

No code 12 sure sounds like a dead one thou.