To john gee- oil sensor has 3 wires however hs been replaced (a/c delco ) still goes in limpmode replaced 02 sensors and fuel filter (95% blocked) replaced pcm and fbw throttlebody and 8 wire plug to the throttlebody still have random limpmode l turn engine off for 10 seconds/restart engine and all is good again there are no error codes via tech 2 scanner checked every possible sensor/ everything and no error codes what elase to look for any ideas john
SOURCE: 92 Buick Le Sabre engine stumbling/hesitation
Have you checked fuel pressure? How about spark on all 6 cylinders? Maybe a coil?
SOURCE: 1998 FORD CONTOUR CHECK ENGINE
sounds like EGR valve and sensor this controls idle speed when at a stop. the po171 is a burn lean or rich code need to know what bank 1 or 2. also check for a vacuum leak from one of the hoses.
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