rudefyet Posted July 18, 2005 Report Share Posted July 18, 2005 *in severely irritated monotone voice* I got a code 42. "Electronic Spark Timing" or some shit like that...where should I start looking? The car missed a bit at idle this morning and is now lacking even more power, but it's not missing yet, just slower. God I just wanna shoot myself today Quote Link to comment Share on other sites More sharing options...
GP1138 Posted July 18, 2005 Report Share Posted July 18, 2005 ICM? CODE 42 Trouble Code 42 indicates that there may be a malfunction in the Electronic Spark Timing (EST) system. During cranking, the timing is controlled by the ignition module and the ECM grounds the EST line. It expects to see no activity on this line at this time. When the ECM enters EST mode, it applies +5 volts to the BYPASS line and expects to see voltage variations on the EST line. Reasons for the ECM to set Code 42: * System in BYPASS mode (i.e. EST line supposedly grounded) but activity sensed on EST line * System in EST mode (i.e. BYPASS line driven with +5 volts) but no activity seen on the EST line Possible causes include: 1. BYPASS line is open or grounded 2. EST line is open or grounded 3. Poor connections between ignition module and ECM 4. Poor routing of EST harness and/or poor quality ignition wires (EMI induced electrical noise 5. Faulty or incorrect ignition module 6. Faulty ECM Quote Link to comment Share on other sites More sharing options...
rudefyet Posted July 18, 2005 Author Report Share Posted July 18, 2005 on a side note...the engine likes to stall on me after I've been driving around a while too Quote Link to comment Share on other sites More sharing options...
terryk2003 Posted July 18, 2005 Report Share Posted July 18, 2005 on a side note...the engine likes to stall on me after I've been driving around a while too that would point me directly towards the ICM... Quote Link to comment Share on other sites More sharing options...
GP1138 Posted July 18, 2005 Report Share Posted July 18, 2005 I'd go about replacing the ICM/coils then. Junkyard, $30, if you can get a guarantee like I get, it's wholly worth the effort. Except you have the LH0. Sorry about that, glad I was double-jointed when I did the ones on my 2.8. At least hanging them back up, they weren't bolted down in the first place. :lol: Quote Link to comment Share on other sites More sharing options...
rudefyet Posted July 18, 2005 Author Report Share Posted July 18, 2005 yep...just let my dad drive it, he thinks it's the ICM too w00t! Quote Link to comment Share on other sites More sharing options...
rudefyet Posted July 19, 2005 Author Report Share Posted July 19, 2005 all fixed...put in a new ICM in and drove around for 3+ hours engine didn't stall once *does the happy dance* Quote Link to comment Share on other sites More sharing options...
GP1138 Posted July 19, 2005 Report Share Posted July 19, 2005 Glad to hear it. Quote Link to comment Share on other sites More sharing options...
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