90 vette code 43
Thread Starter
8th Gear
Joined: May 2009
Posts: 8
Likes: 0
From: Ladner British Columbia
90 vette code 43
have checked voltage at knock sensor key on not running cold 12 volts running up to operating temp 9.5 volts seems high i have replaced the knock sensor the ign module cap rotor ign coil leads plugs temp sensor checked wire from ecm to sensor when car is running at an idle the scanner shows spark timing jumping between 3-13 degrees after driving the car for twenty minutes and shutting it off and leaving it sit for ten minutes will start then emediatly stop the ecm feels very hot any ideas
Team Owner
Joined: Oct 2000
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From: Fort Knox, KY
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Have you checked the voltage at the Electronic Spark Module (ESM)? It's located near the blower motor on the passenger side of the car.
Safety Car
Joined: Oct 2008
Posts: 4,689
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From: Yucaipa CA
a guy one here not more then a day or two ago had a thread on his doing the same thing but I cant remember his user name. he replaced ecm and knock sensor and problem went away.
Safety Car
Joined: Oct 2008
Posts: 4,689
Likes: 4
From: Yucaipa CA
Thread Starter
8th Gear
Joined: May 2009
Posts: 8
Likes: 0
From: Ladner British Columbia
voltage at knock sensor
thanks for the link but i am still unable to find out if 12 volts at the knock sensor is to high and if so what would be the cause of this if its the ecm no problem i will get another one but is there another problem that caused its failure i only want to do this one time vic
