GMC Safari Problem Report

GMC Safari Engine Running Rich Due to Fuel Leak Inside Intake Manifold

(5 reports)

Vehicles using the enhanced vortec V6 engine may be hard to start run poorly and/or use to much fuel due to a fuel leak inside the intake manifold plenum. Commonly this is caused by a leaking fuel pressure regulator or fuel line. The fuel system will need to be pressurized with the upper intake manifold removed in order to determine the exact cause of the leak. Removing the "tuning valve" from the upper intake can allow for limited visual inspection without removing the upper intake manifold.

Fixing now. Took while to diagnose. Not a real fun job. -
Related Items:
The intake manifold gasket may develop and external engine oil or coolant leak. In some cases,...
My van is losing coolant and I believe it is going into the motor oil. I do not see any outside...
one time the dealer told me the manifold needed to be cleaned so i said ok, it seemed to run al...
The fuel pump may fail causing the engine to stall and not restart. Our technicians recommend r...
When towing my boat there is not enough power to go up hills. Even without the boat the power...