Intake manifold noise
#1
Intake manifold noise
1999 S80 2.9
Just changed O2 sensors and reset fuel trim and cleaned the throttle body less thana month ago. I am currently experiencing a "clicking" or "tapping noise" that seems to be coming from the intake manifold area. Car revs harder than usual on cold start (used to rev up to about 1500 and now does it to 2000 and settles down to 1000 instead of 500-700 until it warms up and then it drops down to 500). Is this a vacuum hose/gasket leak in my intake manifold? Failing ETM? Piston slap? Or something far worse?
Thanks.
Just changed O2 sensors and reset fuel trim and cleaned the throttle body less thana month ago. I am currently experiencing a "clicking" or "tapping noise" that seems to be coming from the intake manifold area. Car revs harder than usual on cold start (used to rev up to about 1500 and now does it to 2000 and settles down to 1000 instead of 500-700 until it warms up and then it drops down to 500). Is this a vacuum hose/gasket leak in my intake manifold? Failing ETM? Piston slap? Or something far worse?
Thanks.
#4
#6
p0161 Rear heated oxygen sensor (HO2S) preheating, bank 2 Faulty signal. Permanent fault
#7
#11
#14
Any timing belt work or anything going on with the VVT? If you are hearing clacking/tapping and you are throwing o2 codes, and you've got some rev issues you may have something going on with a valve... don't mean to alarm...
How many miles on the current timing belt?
Can you do a compression test?
How many miles on the current timing belt?
Can you do a compression test?
#15
Any timing belt work or anything going on with the VVT? If you are hearing clacking/tapping and you are throwing o2 codes, and you've got some rev issues you may have something going on with a valve... don't mean to alarm...
How many miles on the current timing belt?
Can you do a compression test?
How many miles on the current timing belt?
Can you do a compression test?
#18
It kind fo sounds like this engine:
http://www.youtube.com/watch?v=pxRx31f6BXQ
I guess it sould be a coil or wiring. The coils are all fairly new.
http://www.youtube.com/watch?v=pxRx31f6BXQ
I guess it sould be a coil or wiring. The coils are all fairly new.
#20
It kind fo sounds like this engine:
http://www.youtube.com/watch?v=pxRx31f6BXQ
I guess it sould be a coil or wiring. The coils are all fairly new.
http://www.youtube.com/watch?v=pxRx31f6BXQ
I guess it sould be a coil or wiring. The coils are all fairly new.
If not coil, and more timing/fuel mapping, you could possibly get that noise.
How's the tension on the timing belt?