Log in

View Full Version : Anyone have a stock computer/chip for Speed Density? Come in.

Koll
03-16-2006, 10:05 PM
Hi. Anyone have a stock computer or chip for a 91 5.7 TPI? I dont know what other computer / chip years will work. Basically I just want to plug it into my car. My dad thinks its the computer / chip that got "fried" somehow. I just want to make him happy and eliminate that possiblity.

Thanks, Mike.
The Fixer
03-16-2006, 10:16 PM
You need a MAF computer and chip, if it's an '89 harness. The ECM number ends in 165. A Speed Density ECM won't plug in.
Koll
03-16-2006, 10:20 PM
Ehhh....

Well it is definently a Speed Density setup (if not I think I found the problem) The engine was out of an 89, could very well be the 91 setup
Ian
03-17-2006, 12:03 AM
1990-1992 were speed density. 1993 was too, but I dont think that would work. everything else is MAF. Figure out which one you have and get back to us. :)
Koll
03-17-2006, 07:11 AM
I know its speed density.
V
03-17-2006, 09:40 AM
Are you getting any codes? When my chip was bad, I got code 51.

Oh and for a computer, you can use any 90-92 ecm with the last 3 numbers of "730". that came in all 90-92 tpi cars AND 90-92 3.1l V6 cars as well.
Koll
03-17-2006, 07:02 PM
Only codes are 33 and 42.
The Fixer
03-17-2006, 09:11 PM
Code 42 is NO distributor reference signal; usually means a dead ignition module or something along those lines. Since you had to pull the intake and everything off, are you sure all the grounds are hooked up again? There should be a few bolted to the back of the passenger side head, and also a ground wire for the coil.
Koll
03-18-2006, 01:29 PM
thing is tho...Im getting spark.
V
03-18-2006, 02:45 PM
code 33 is MAF related...weird. lol
WayFast84
03-18-2006, 02:54 PM
wait so your names mike? I thought it was koll
Koll
03-19-2006, 05:18 PM
Yes
qwikz28
03-19-2006, 05:22 PM
have you got it running yet?
Ian
03-19-2006, 07:48 PM
33. High voltage (low vacuum or low flow) at mass air flow sensor (or MAP sensor)

42. Fault at electronic spark timing circuit OR
Fault at direct ignition system OR
Fault at fuel cutoff relay circuit
The Fixer
03-19-2006, 08:25 PM
33. High voltage (low vacuum or low flow) at mass air flow sensor (or MAP sensor)

42. Fault at electronic spark timing circuit OR
Fault at direct ignition system OR
Fault at fuel cutoff relay circuit

Make sure the EST is plugged in, all grounds are good, and that the distributor is plugged in properly. As far as the code 33, check all vacuum lines and make sure nothing is ripped or disconnected.

Good luck.