Vehicle make/model = olds aurora
Year = 1998
Mileage = 183000k
Engine size = 4.0
tech = jk
question = my 98 olds aurora seems to have a misfire
i just changed the spark plugs and wires last year and i checked all
the coils (checked the spark plugs and wire as well) but all seems to be
in order
i cleaned out my egr valve but it made no difference, the check engine
light comes on from time to time but it goes away after some time
the car seems to idle rough more when its in gear than when in park
sometimes if i don't put it in neutral at a light it will stall out,
furthermore it seems to be affected more when the heat or ac is on than when
its off,
there is a definite misfire it can be felt under acceleration and at
all stops, as i said all the plugs, wires and coils are good, what else
could be causing this problem?
thanx
JK: The next step is to have the system scanned for codes. Most of the large national parts
store chains will do this for free. The codes(s) will give some direction as to where to focus on
repairs. Sticking injector is a possibility.
Vacuum leak also. The idle worse in gear than not, could be a worn engine mount. Sounds like
you have several problems. As first stated, need to get the system scanned to not where to
continue diag.
Year = 1998
Mileage = 183000k
Engine size = 4.0
tech = jk
question = my 98 olds aurora seems to have a misfire
i just changed the spark plugs and wires last year and i checked all
the coils (checked the spark plugs and wire as well) but all seems to be
in order
i cleaned out my egr valve but it made no difference, the check engine
light comes on from time to time but it goes away after some time
the car seems to idle rough more when its in gear than when in park
sometimes if i don't put it in neutral at a light it will stall out,
furthermore it seems to be affected more when the heat or ac is on than when
its off,
there is a definite misfire it can be felt under acceleration and at
all stops, as i said all the plugs, wires and coils are good, what else
could be causing this problem?
thanx
JK: The next step is to have the system scanned for codes. Most of the large national parts
store chains will do this for free. The codes(s) will give some direction as to where to focus on
repairs. Sticking injector is a possibility.
Vacuum leak also. The idle worse in gear than not, could be a worn engine mount. Sounds like
you have several problems. As first stated, need to get the system scanned to not where to
continue diag.
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