1990 Mercury Grand Marquis "engine hesitation" Questions

code 171 and 174 on a 97 mercury grand marquis engine idles high then low and car hesitates when i hit the gas and hesitates really bad when first strat up in morning put code scanner on it and got ...

...hesitation the Catalytic may be getting fouled by the way the engine is running. There may be another Code to read for the problem that caused the Catalytic converter to foul. You have between 25 and ...

1993 gran marquis hesitates and idles rough with check engine light on get code checked at autozone or advanced auto for free. Probably 02 or egr sensor My car did that and it was the vacumn hose had ...

Engine hesitates jolts and cuts off when i give it gas but if i drive like a old man the problems not as bad but is still there.it always starts back up no matter how many times it shuts off....idk ...

It beagn to hesitate at takeoff, then began mssing as it shifted and running rough. Check engine lamp blinked, then came on solid. Plugs and wires are old. Don't hae code yet. Will the OBD drill down ...

...hesitation, but now I don't hear the engine, no more rough idling, the engine is quiet as if It is about to die on me. While in drive and when at a long stoplight, or railroad crossing, my engine ...

2001 mercury grand marquis. Engine stutters or hesitates with jerking when lightly accelerating. Seems like an air, fuel, or spark delivery problem. At wide open throttle this problem is not as ...

2000grand marquis hesitates and engine light on Sounds like one of the coils are bad. Have it scanned for codes. It should tell you which cylinder.

...and it went into drive for 1/4 mile then would not go in further Check the tranny oil level ,with engine stationary and cold pull dipstick for transmission and it should be about a 1/4 to 1/2 inch ...