Code 34 and dim headlight
Thread Starter
3rd Gear
Joined: Apr 2007
Posts: 3
Likes: 0
Code 34 and dim headlight
I recently purchased a 87 vette. It intermittently throws code 34. At times the engine idle is smooth as silk. Other times it rough as hell. Any comments would be appreciated. Also, the drivers side headlight is a lot dimmer than the passenger side. I replaced the headlight and still have the same problem?
Team Owner
Joined: Sep 2001
Posts: 62,126
Likes: 1,727
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
http://members.shaw.ca/corvette86/Code%2034.pdf
fix the code, and if you have to replace the MAF itself you should replace the relays as well, both are on the firewall behind the battery
fix the code, and if you have to replace the MAF itself you should replace the relays as well, both are on the firewall behind the battery
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Follow the link posted above to find out what is causing the
ECM to show a code 34. Read through it a few times to get the idea. As for one headlight being more dim than the other, I would check the voltage on the driverside headlight. It's more than likely a bad connection somewhere.
It would be benificial to purchase a FSM for your year car. You can find them used or new from $40-120 or so. That is where the link came from. Also it will tell you how to troubleshoot the headlight system among other.
ECM to show a code 34. Read through it a few times to get the idea. As for one headlight being more dim than the other, I would check the voltage on the driverside headlight. It's more than likely a bad connection somewhere.
It would be benificial to purchase a FSM for your year car. You can find them used or new from $40-120 or so. That is where the link came from. Also it will tell you how to troubleshoot the headlight system among other.
Race Director
Joined: Sep 2005
Posts: 10,878
Likes: 1
St. Jude Donor '07
I fell for a bad connector. It all volted out properly and I changed MAFs, but had the same problem. So, while you are checking everything, make sure the connector's female parts are not moving and causing a poor connection. If they are, re-crimp the connector and try again.
Search for threads started by me and you'll find it. "Idle Problems" is one of them.
Search for threads started by me and you'll find it. "Idle Problems" is one of them.
