[V8] No ECU, messy running..

[Moy, Bob]

The brown ground wire should be going to terminal 3 of the ignition coil.

Bob Moy


-----Original Message-----
From: Coleman, David [mailto:David.Coleman at blackrock.com] 
Sent: Tuesday, December 16, 2003 3:50 PM
To: V8 List (E-mail)
Subject: RE: [V8] No ECU, messy running..


No input?  Any intel on the location of terminal 13 and 55 on the ECU plug?
Or just the purpose of the two brown ground wires next to the reference
sensors?

Thanks again,
-DaveC.

> -----Original Message-----
> From: Coleman, David
> Sent: Tuesday, December 16, 2003 9:23 AM
> To: V8 List (E-mail)
> Subject: [V8] No ECU, messy running..
> 
> 
> To follow up on yesterday's "crappy running in crappy weather" ordeal: 
> Recap -- after driving in heavy rain for a bunch of miles, the car 
> started exhibiting various levels of hesitation, bucking, farting, and 
> general wacky behavior.  Put it away in the garage for 24 hours.
> 
> Last night I made sure the TPS plug was dry and drove around 
> the block.  No problem.   But an hour later, the same 
> troubles from the day before came back.  Three main points to
> be made after diagonsis:
> 
> 1)  TPS plug was dry, although showed signs of having been
> wet.  WD-40, compressed air, repeat 20x.  It's now drier than 
> this list's sense of humor.   :-]
> 
> 2)  Code Retreival:  Inop.  I was using my little LED w/
> jumper wire setup, which has worked countless times in the 
> past.  But now it just glows red, and won't start any code 
> blinking sequence.  Fuse #4 OK, +/- in the first black 
> terminal confirmed.  Still working on confirming continuity 
> w/ other terminals and corresponding ECU plug wire.  This 
> malady has me especially concerned.
> 
> 3)  All sorts of intermittant failures:  Car sometimes
> starts, sometimes not.  Runs VERY rich and at various levels 
> of crappiness when it does.  Right side distributor SOMETIMES 
> has no spark, oil pressure warning comes on SOMETIMES, Fuel 
> pump relay is clicking like mad, and running/starting 
> behavior is affected by jiggling the reference sensors, the 
> oil pressure plug on the r/s block (isn't that the gauge, not 
> the lamp?), and the ANTI-LOCK OFF light stays on when the car 
> does decide to start.
> 
> I've confirmed good dist. caps and wires (via swap),
> reference sensors are new, O2 is new.  Tonight I plan to 
> remove the belly pan and see what there is to see.  I also 
> will look for bad ground conditions.   But this one's 
> starting to get away from me...  Questions to get me going 
> again:   Does anyone have any idea why I'd have trouble 
> communicating w/ the ECU, i.e. get no codes?  What do the two 
> semi-heavy brown wires bolted to the rear of the left side of 
> the block ground??   Generally, WTF?
> 
> Any insight would be greatly appreciated!
> 
> -DaveC.
> '91 V8 5M
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