Question about 1991 Ford F150
WHEN I PUSH ON THE GAS WHITE SMOKE COMES OUT AND THE ENGINE MAKES A RATTLE SOUND LIKE A BAD VALVE I LET GO OF THE ACCELERATOR AND IT STOPS SMOKING, STARTS UP FINE AND IS NOT MISSING TOO BAD. WHAT CAN IT BE?
Sounds as if you are running extremely lean.Has EGR been bypassed maybe?
What is fuel pressure,on that vehicle the fuel pressure regulator may be adjustable.Some of these had an allen screw inside the vacuum port where you could richen the mixture some.Also try backing down on the timing a few degrees.
Posted on Mar 03, 2009
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Posted on Jan 02, 2017
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