Of the six or so codes I had, this is the only one I have left and don't have a clue what it is or how to fix it. I do have one wire that is not connected, it is a tan and black wire, I think, and it is at the rear of the engine. When I installed the new engine I could not find a place for this to go into.
Tom

 

Code 12 (one flash, then two flashes) means the computer is ok and working properly. Dont try to fix it.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-

 

Yep, what Kevin said...

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R
and 2 POS commuters...

R.I.P. #3
"He can see air"

 

ummm, ok, then how come i am getting an SES light then? humm.....can anyone id that wire i am talking about and the car is running rich could it be a faulty 02 sensor and/or CTS?

 

Code 12 is no distributor reference pulse, not speed pulse. It is perfectly normal because at that point in checking your codes, your engine is not running and the ECM isn't receiving pulses from the distributor.

Tan and black could be the ESC wire, or possibly if memory is correct, the TCC wire. The single ESC wire disconnected would cause a code, the TCC wire wouldn't, (at least on mine it doesn't.)



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_ ___ _
SMasterson

 

6-speed,

The tan/black single wire may be the EST bypass connector. Not having that connected will not only set a DTC but will prevent the ECM from providing the corect spark advance. You might be runnign around on base timing, and will get some real performance improvements when you reconnect the wire.

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Later,
Vader
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"Click - Click - BOOM!"
Adobe Acrobat Reader

 

where does it connect any could it being diconnected cause a rice condtion?

 

is that wire right behind the distributor? if so i think it is for the tack, because when i fist started out i could not find the est so i looked at that and unhooked it and the rms were dead and were not moving on the gauge so i hooked it back up and you could see the rms again. its too late to look now but it either goes back in to the harness or the dis or coil somewhere stuffed back there can look tomarrow if still in need and that is it. good luck

 

I ment rich not rice, also yeah it is behind the dist, but my tac works fine, the only gauge that does not work is the oil pressure, my car runs rich, you can smell it in the exhaust but the only code is MAF Power Relay(36), now it this was true what would the car run like, my car starts up with a 1500-1000 rpm idle and then after a WHILE falls to 800.

 

the wire i am talking about is not tan and have a black strip it is white with nothing on it and has gray clips instead of black ones like the est and eventually goes in to the coil but i dont think that is what you are talking about. but anyways i have a quick q to when i just walked out there it reminded me to ask you guys what are those small connectors next to the est for, one has a red wire and the other colori forgot, they are about 1/3 the size of the est clip what are they for a would think a option that i dont have maybe a hood light or somehthing? or something else because my car is only a base firebird so i know there could be a lot more stuff on it like on the T/A's gta's and formulas

 

it is a male, 2 prong connector with one wire tan with a black strip and the other all black, it is behind the engine.

 

That is likely the TCC solenoid connector, for the lockup torque converter on the transmission.

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Later,
Vader
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Justice and Freedom will Prevail

 

Sorry, due it is a manual not an auto, I am getting a code 36 now, which it the MAF Burn-off or the ESC I think. Now could that wire have anything to do wtih the ESC before I get a burn-off relay. This is one one of the only things keeping me from getting it inspected and registered and insured and all that bla bla stuff so i can drive the car legaly.

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1987 Black 305 TPI 5spd IROC, seems to be fully loaded, but can't find RPO codes.

AIM: SzkiRM125
F-bodies : The last with-standing defense against the Invasion.

 

6-Speed,

Your original post indicated a DTC 12, not a 36. This was only a little confusing. The 36 is for a MAF burnoff failure. Check the relay, or replace it for about ten bucks.

The way I read your post, it stated your have a single "tan and black wire", not "wires", at the rear of the engine. That is why I guessed it was for a TCC, the only connector that should have that single wire in it. I should have realized that was not your situation, since I should have guessed you have a manual transmission by your login name. Again, this can be avoided by giving all pertinent information in a siganture or in the text of the posting.

Since you now indicate that you have a TWO-WIRE connector with a tan and a black wire near the rear of the engine, I would guess that it is supposed to connect to the MAT/IAT sensor. If this is the case, having this wire disconnected should generate a DTC 23.

My guess is that your rich condition could be caused by a lack of MAF burnoff and the ECM using base fuel tables, which are intentionally rich. Repair or replace the relay, clear the codes, then try again.

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Later,
Vader
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Justice and Freedom will Prevail