i have a 1997 dodge neon that has a rough idle cold and stall when warm
and a rough idle we replaced the computer the coil pack the fuel pump
the shut down relay fuel pump relay cam sensor throttle body with a new
air idle control both o2 sensors map sensor and it still does it and we
did the timing belt 2 month's a go
help would be nice
my father in law is a chrysler machanic and he told me to do one thing
at a time and that is what i didand we started with the basics he is
at a stand still as i am with no answers for the way it runs
compression and check all sensor values.Why would you replace the coil pack
and fuel pump if the basic check showed good? Have the system tested for
fault codes (and clear them) after all the ones you put in by poking around,
then monitor the sensors with a scan tool.
The code is being set because the 02 sensor is detecting not enough oxygen
at the sensor (thus setting a rich fault)!!!!!Have you checked to see what
the engine vacuum is? (basic check being throwing parts at it) It should be
at least 17 inches of vacuum at idle. If not. The map sensor will tell the
computer that the engine is under a load and to give more fuel....and giving
more fuel at idle is not good!!
You could have a plugged cat-converter, worn out engine, injector stuck,map
sensor electrical/vacuum problem, fuel pressure regulator (once again Basic
test.What was fuel pressure reading at idle?) You said you did the timing
belt 2 months ago......is this when the problem started or did you do the
belt to try and fix this problem?
no the car ran good until 2 weeks ago is when it all started and the
only thing i did not replace was the cat we were looking at that next
the motor has 250000 on it and it ran good until 2 weeks ago
and good luck came to me via email yesterday from a service tech in ny
he told me exactly what my problem was and i fixed it last night and
this is what it was the egr valve was stuck open causing the whole
problem not fuel not any sensor the egr valve and realy want to thank
every one for the help they gave me along the way thanks again
the egr was the last thing i would have though of to be the whole
problem with my idle and the stalling and i don't think a vacume test
would have pointed that way i would think a vacume test would lead to
the cat instead not the egr heated up the intake and caused a vapor
lock and caused it to run crummy and stall when hot
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