Question about Cars & Trucks
Runs rough as soon as it hit operating temp. Have changed plugs ,wires, Cleaned maf and throttle body No CEL or codes New TPS
Check your fuel pressure and your fuel filter . Also check your pids.
which the most important one is your short term fuel trim while it's running ,it will be either rich or lean . I know it sounds silly but when the numbers are positive it's lean and when there negative it's running rich.
Posted on Feb 11, 2014
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Posted on Jan 02, 2017
Sounds like the fuel pressure regulator. Could also be that the timing jumped. But I'm leaning towards the pressure regulator. Hope that I could help. Best wishes.
Posted on Jan 17, 2009
try this b4 taking things apart... redexe/wynns fuel additive and using high octane fuel the computer will adjust running accordingly...
Posted on Mar 09, 2010
SOURCE: 2001 taurus dohc codes 171
There is a large vac line coming straight down from the throttle body that goes to the PCV system. See if it has a hole in it. It is likely sucking air.
Posted on Jul 17, 2010
You might want to pull the coils and ignition control module. They are really easy to get to on this car, right on the front of the block. Ignition control modules can be tested electronically at most chain parts stores. Coil can be a bit more of a pain. Quite honestly it's very rare that any that I test, even the ones that I know are bad, test bad. Sometimes the coil windings spoil out and when they get hot they swell and no longer produce spark.
Is this a problem only in idle? Is it drivable and if so what happens then?
Posted on Nov 04, 2010
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