2000 Buick Lesabre 3.8L service engine soon.
Codes = # for cam sensor circ a
New cam sensor wiring checked reset codes light came back on
was told may be crank sensor or the pcm at a loss car is
harder to start and idles rough no stalling hesitates some.
Question = what should be checked first service engine light cam
sensor was bad replaced with ac Delco light came back on
with in 10 miles took it back was told crank sensor may be
bad or may have a bad pcm he wasn't sure and didn't want
to spend my money car is harder to start at times was
dead once on third attempt to start it started right up rough
idle not as much pep also the door locks will lock and
unlock at times for no reason while in park idling where
would be a good place to start?
Codes = # for cam sensor circ a
New cam sensor wiring checked reset codes light came back on
was told may be crank sensor or the pcm at a loss car is
harder to start and idles rough no stalling hesitates some.
Question = what should be checked first service engine light cam
sensor was bad replaced with ac Delco light came back on
with in 10 miles took it back was told crank sensor may be
bad or may have a bad pcm he wasn't sure and didn't want
to spend my money car is harder to start at times was
dead once on third attempt to start it started right up rough
idle not as much pep also the door locks will lock and
unlock at times for no reason while in park idling where
would be a good place to start?
Answer: There are a couple things you can check out. First off, the
3.8 liter engines are known for bad fuel pressure regulators. The
diaphragm inside it breaks and fuel gets sucked into the intake
through the vacuum line. This creates a hard starting condition due to
too much fuel being introduced in the intake. This is an easy check.
Get the car hot, preferably after driving a while. Remove the plastic
engine cover and you can see the fuel pressure regulator on the fuel
rail. Remove the vacuum line that goes to it and let it sit a few
minutes. If you see gas start to leak out the hole of the regulator, you
know it is bad. Even if you can just smell gas, I would recommend
replacing it. Another thing to check out, and that is known to cause
problems like the one your having, would be the Mass Airflow Sensor.
You can tap on it while the car is running and see if it stumbles or
dies, or better yet, if you can get the car to act up, unplug the sensor
and see if anything changes. I wouldn't be too sure about the crank
sensor, when they are faulty it will usually cause a stalling condition
when hot, and you don't seem to have that issue. If all else fails, I
would check fuel pressure and possibly scan for any trouble codes
and go from there.
3.8 liter engines are known for bad fuel pressure regulators. The
diaphragm inside it breaks and fuel gets sucked into the intake
through the vacuum line. This creates a hard starting condition due to
too much fuel being introduced in the intake. This is an easy check.
Get the car hot, preferably after driving a while. Remove the plastic
engine cover and you can see the fuel pressure regulator on the fuel
rail. Remove the vacuum line that goes to it and let it sit a few
minutes. If you see gas start to leak out the hole of the regulator, you
know it is bad. Even if you can just smell gas, I would recommend
replacing it. Another thing to check out, and that is known to cause
problems like the one your having, would be the Mass Airflow Sensor.
You can tap on it while the car is running and see if it stumbles or
dies, or better yet, if you can get the car to act up, unplug the sensor
and see if anything changes. I wouldn't be too sure about the crank
sensor, when they are faulty it will usually cause a stalling condition
when hot, and you don't seem to have that issue. If all else fails, I
would check fuel pressure and possibly scan for any trouble codes
and go from there.
