Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
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On my way home from work today I threw a code 43 in the car. Electronic Spark Timing circut-low voltage detected OR Electroni Spark Control- circut problems.
I was drivin then all of the sudden the check engine light came on and the car started to stumble a little bit and would not accelrate past 3000rpm. So I limped it home about 12 miles and right when I turned to go into my subdivision the check engine light went off and I got all my acceleration back.
What would cause this???? I dont even know what the EST or ESC is..
The car is running fine again...fixed itself
__________________ 1988 T/A 305TBI, 5spd-Suspension: KYB's, Eibach Pro Kit, Spherical Strut Mounts,LCA's and LCARB's, Panhard Bar,Strut Tower Brace. B&M Ripper Shifter, Hooker Cat-Back,A/C Delete Pulley,rebuilt rearend w/3.73 Motive gears and Eaton Posi
1979 Malibu
1993 Pontiac Bonneville
1999 GMC Sonoma SLS: 4.3ltr 5spd
more pics at http://members.cardomain.com/pepsicola300
The ESC is the Electronic Spark Control, part of the Electronic Spark Timing (EST) system. On your '88, the ESC should be mounted to the firewall near the power brake booster. Other essential parts of the EST are the knock sensor on the lower right side of the engine, the ignition coil switching module (HEI module) in the base of the distributor, and the ECM. All the connections between those devices are also critical. Since your problem is apparently intermittent, I'd start by checking the connetions closely, including engine grounds. Chances are that teh ESC is losing signal from the knock sensor, but it could be any other connection as well.
__________________ Later,
Vader
- - - - - - - - - - - - - - - - - - "Everything should be made as simple as possible, and not one step simpler."
Vader, maybe you can help me. I have an 82 Trans Am CFI and am having problems locating my Electronic Spark Control Module. I can't seem to find it where you told Pepsicola it is (due to being an 88 maybe). Could you help me locate it or give me any other possible locations?
Thanks Vader, I appreciate it!
haste
Quote:
Originally posted by Vader Pep,
The ESC is the Electronic Spark Control, part of the Electronic Spark Timing (EST) system. On your '88, the ESC should be mounted to the firewall near the power brake booster. Other essential parts of the EST are the knock sensor on the lower right side of the engine, the ignition coil switching module (HEI module) in the base of the distributor, and the ECM. All the connections between those devices are also critical. Since your problem is apparently intermittent, I'd start by checking the connetions closely, including engine grounds. Chances are that teh ESC is losing signal from the knock sensor, but it could be any other connection as well.
I'm having this problem too. Did anyone figure it out? Pave, our ESC modules are in the ecm / memcal (later cars). I am needing help diagnosing this in a bad way (8 months and still no car).
I have 4.98V at the KS wire. The car will still stumble whether or not the KS is plugged in. "Rev limit" at 3000 rpm just like you. Major popping/backfireing. Vader, please help. I'll send you candy Seethis thread
See
