| Re: 1992 Vette Misfiring intermittently |
Subject: Re: 1992 Vette Misfiring intermittently by ecorti95 on 2021/12/6 21:23:17 I performed most of the suggestions indicated by you: check grounds, check connectivity and shorts between ecm and ccm (this was a real pain in the butt). These did not correct the problem, so I sent the ecm to SIA electronics on July 2020. After getting it back and installing it all problems were resolved! The car has run great, until yesterday (12/5/2021) when the problem have reoccurred! Car stalled at a traffic light, restarted and and was able to drive home. I pulled codes from CCM Diagnostics, jumping Pins A-G in OBD1 connector Module 1: C41, H41 - Loss of ECM Serial Data Link Module 4: displays ERR Module 9: H72 - Loss of Data between CCM and EBTCM ECM Diagnostics, jumping Pins A-B in OBD1 connector. No reaction. Does not pull blinking codes. Something new: the speedometer displayed 0 MPH while driving home. I am probably going to send the ecm back to SIA Electronics, as it has a lifetime warranty for their repair. |
