does anyone have a chart or diagram of where all the engine grounds are? I'm having some intermittent electrical problems and i think the grounds would be a good place to start, but i don't know where they all are.

Thanks

 

There are two clusters, one on the rear of each cylinder head..

 

I looked up a 1988 Pontiac Firebird V8-350 5.7L and this is what I got:


Ground G100 (VIN F): Lower LH Front Of Engine

Ground G102: LH Rear Corner Of Engine Compartment

Ground G103 (VIN E): On Radiator Support

Ground G103 (VIN E): On Radiator Support

Ground G104: On Radiator Support, Behind RH Headlights

Ground G108: RH Front Of Dash, Above Center Of Blower Motor

Ground G112 (VIN F): Rear Of LH Cylinder Head

Ground G118 (VIN F): Rear Of RH Cylinder Head

Ground G123: RH Front Corner Of Engine Compartment


Bill

 

Hello gta_88_kicks,

Check your e-mail, the information in it may help you. If it doesn't, just disregard it.

 

Check the main one bolted to the motor, this has a tendancy to corrode between the block an plate over time and is usually the biggest problem in the grounding system. Don't forget the antiseize.

 

thanks a lot, so the maf grounds are on one of the cylinder heads, ill have to check those.

interesting thing though, ever since i got my car back from the tranny shop these electrical problems have been happening. im willing to bet that they knocked a couple of those grounds loose when dropping the tranny.