Diagnostic Help Please
11-18-2006, 10:20 PM
#1
2nd Gear Member
Thread Starter
Join Date: Nov 2006
Location: South Jersey
Posts: 260
Diagnostic Help Please
2000 GT
Have a pretty serious knock coming from the #1 (front passenger-side) cylinder.
Self diagnosis has turned up the following.....
1) Only happens once the car is at, or near operating temp. (no knock when car is cold)
2) Replaced plug in #1 cylinder - knock still present
3) No noticeable knock at idle
4) Light throttle - mild knock... Heavy throttle - loud knock
5) Disconnecting #1 spark plug eliminates knock
At this point I am not sure what to check next.
Any input would be appreciated.
Have a pretty serious knock coming from the #1 (front passenger-side) cylinder.
Self diagnosis has turned up the following.....
1) Only happens once the car is at, or near operating temp. (no knock when car is cold)
2) Replaced plug in #1 cylinder - knock still present
3) No noticeable knock at idle
4) Light throttle - mild knock... Heavy throttle - loud knock
5) Disconnecting #1 spark plug eliminates knock
At this point I am not sure what to check next.
Any input would be appreciated.
11-18-2006, 10:38 PM
#3
6th Gear Member
Join Date: May 2006
Location: Nicely done
Posts: 11,881
RE: Diagnostic Help Please
exactly, compression test should reveal quite a lot, i was
thinking a valve issue
thinking a valve issue
ORIGINAL: Dan04COBRA
Do you have a coil going to hell when it reaches operating temp? Is the car down on power at all while it's got a nasty knock?
How is compression looking?
Do you have a coil going to hell when it reaches operating temp? Is the car down on power at all while it's got a nasty knock?
How is compression looking?
11-19-2006, 07:08 PM
#5
3rd Gear Member
Join Date: Jul 2006
Location:
Posts: 690
RE: Diagnostic Help Please
I actually have that problem right now as well, with your exact symptoms. Im just doing a rebuild because my engine has 97+ thousand on it. But they're going to rip apart the engine and see what was exactly wrong with it before they start the rebuild, so ill let you know what i find out if you dont have any luck between now and then.
11-19-2006, 08:57 PM
#6
6th Gear Member
Join Date: May 2006
Location: Ohio
Posts: 6,448
RE: Diagnostic Help Please
ORIGINAL: BoanHed
2000 GT
Have a pretty serious knock coming from the #8 (front passenger-side) cylinder.
Self diagnosis has turned up the following.....
1) Only happens once the car is at, or near operating temp. (no knock when car is cold)
2) Replaced plug in #8 cylinder - knock still present
3) No noticeable knock at idle
4) Light throttle - mild knock... Heavy throttle - loud knock
5) Disconnecting #8 spark plug eliminates knock
At this point I am not sure what to check next.
Any input would be appreciated.
2000 GT
Have a pretty serious knock coming from the #8 (front passenger-side) cylinder.
Self diagnosis has turned up the following.....
1) Only happens once the car is at, or near operating temp. (no knock when car is cold)
2) Replaced plug in #8 cylinder - knock still present
3) No noticeable knock at idle
4) Light throttle - mild knock... Heavy throttle - loud knock
5) Disconnecting #8 spark plug eliminates knock
At this point I am not sure what to check next.
Any input would be appreciated.
I'm going to bet you have a spun rod bearing. You will end up hearing it at idle soon if it is.
11-20-2006, 01:52 PM
#10
2nd Gear Member
Join Date: Feb 2005
Location: SLC, Utah
Posts: 413
RE: Diagnostic Help Please
ORIGINAL: Brute03
+1 on the compression test, and btw the front passenger cylinder is #1 not #8
+1 on the compression test, and btw the front passenger cylinder is #1 not #8