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Discussion Starter · #1 ·
Just put my car all back together. New 42.5's, precision chip, new turbo, everything all niced up. Fired the car up and it started! Man was I pumped! Until I fumigated the storage facility! Way too rich. And it's throwing a code (prolly nothing serious, it is running ok). So I figure I'll throw the t-link on her and see what she says. All it said was that it couldn't link to my ECM. I double checked all my preferences, checked my cables and connections were solid, everything is the same as it was last season, but it just won't read any data. And my car is throwing a code
What could be wrong? Is there something that is not mentioned in the t-link manual?
 

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Resident Idiot
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Sounds like the ECM has no power. Make sure the orange wire by the battery is plugged in.

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Stock Block, Stock Cam, PTE-52, Champion Heads, V4, MSD50's, TH DP, JayJackson 62mm TB, 16position MaxEffort Chip. 3680# with Driver
12.0 @ 116.5mph w/20psi using 17.9* timing

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Is it your old ecm, Mike? I know when I slapped 40 pounders in my 85 and then went back to 32, it ran rich for 3 weeks. I would unplug the computer over night and try it the next day. For some reason, sticky flip-flops or transistor cap problems my blm did not change. Good to hear you got it running at least. You should send your canoe to Zap and he can canoe down to Canada and help you out!
 

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Discussion Starter · #5 ·
Well I got around to checking the code, Error Code 51 - PROM. I think Precision sent me a chip designed for use with the '87 ECM. The car starts and runs, but still throws the code and runs a little rough. Also, the Turbolink can't receive any data from it in either '85 or '87 mode. Tough break, it'll cost me a small fortune to send the chip back and get a new one. I went ahead and checked the chip and the connections and they seem nice and tight. But(!) lucky for me I scored an '87 ECM last year. So I'm heading to the boneyard tomorrow to look for MAF sensors. Which sensor is correct for the '87? Was it used in any other cars? MAT is easy to find and cheap as dirt anyways, so looks like I'm doing an ECM conversion.

Am I insane, or does this sound like a plan?

[This message has been edited by mike85gn (edited April 21, 2002).]
 

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The stock 85 MAF sensor works fine for me ( a helluva lot better than the 87' style I got from Advance Auto
) and I have converted to the 87 ecm. I wouldn't worry a whole lot about it if you have a good 84/85 maf. No other car uses the 87 style as far as I know.

I wouldn't run the car as long as you're getting a prom error, if you're running in limp mode with the bigger injectors you will dump too much fuel into the cylinders from what I am told.

Plug the chip in the 87 ecm, plug the ecm in, and see if it works (other than the mat sensor code).

[This message has been edited by Zap (edited April 21, 2002).]



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