need help!! possible bad ecm
Thread Starter
5th Gear
Joined: May 2006
Posts: 5
Likes: 0
need help!! possible bad ecm
1992 lt1 auto 120000 miles...started car for the first time in the spring.It started running rich and fans came on.I thought the coolant sensor was not working.I tapped the ecm and engine shut off.So i removed the ecm and sent it to a guy to re solder loose connections.I put back the ecm and engine would not start.I checked for fuel pressure, perfect, injector pulse,perfect,checked for spark,no spark.I pulled connectors,ingnition module,coil,optispark and put them back in cranked engine and now runs really rough like its missing cylinders or really rich.I pulled codes...1-c41,h41...4-err...9-h62,h72 plz help.
Racer
Joined: Nov 2005
Posts: 456
Likes: 3
From: Sumner Texas
1992 lt1 auto 120000 miles...started car for the first time in the spring.It started running rich and fans came on.I thought the coolant sensor was not working.I tapped the ecm and engine shut off.So i removed the ecm and sent it to a guy to re solder loose connections.I put back the ecm and engine would not start.I checked for fuel pressure, perfect, injector pulse,perfect,checked for spark,no spark.I pulled connectors,ingnition module,coil,optispark and put them back in cranked engine and now runs really rough like its missing cylinders or really rich.I pulled codes...1-c41,h41...4-err...9-h62,h72 plz help.
Well since you're pulling codes okay, this is kind of borderline, but it does sound like a possible bad ECM. Have you analyzed the codes yet?
