surging issue
#1
surging issue
i have a 94 chevy k1500 i replaced the engine and now i have 2 problems, 1st is that i cannot communicate with the ecm, 2nd is at an idle and in gear the engine surges. Its only 50-100 rpm surge but once the egine is warm it is very noticeable. Any pointers on what to look at, replace would be appreciated. I have replaced egr valve, driver module, and all 3 solenoids on the left rear of the engine, along with the lift pump and filter.
#3
when trying communicate with a scanner, solace, genesis, or even a newer matco scanner, none of them are able to access the ecm. I was able to run a jumper wire into the the dlc which brought up a code for the optical eye malfunction however, i have not been able to find anyone that can point me in the right direction to correct the issue.
#4
Optical sensor is in the top of the ip.
Check to see if there an "optical filter" installed in the line. They have been known to fail. You can unplug it and plug the harness directly into the ip connector.
Check for filth and corruption on the optical sensor pins.
Sent from my iPhone using Tapatalk
Check to see if there an "optical filter" installed in the line. They have been known to fail. You can unplug it and plug the harness directly into the ip connector.
Check for filth and corruption on the optical sensor pins.
Sent from my iPhone using Tapatalk
#5
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