clunking engine noise
#1
05-20-2009, 02:38 PM
clunking engine noise
recently changed the valve cover gasket this is a aeb engine
replaced all 4 spark plugs and icm
car has a loss of power and a loud knocking noise sounds like from the head maybe further toward the back
the engine evens out at about 2.5K 3K rpm but still low on power
replaced all 4 spark plugs and icm
car has a loss of power and a loud knocking noise sounds like from the head maybe further toward the back
the engine evens out at about 2.5K 3K rpm but still low on power
#3
05-21-2009, 10:20 AM
Tough one...What plugs did you use? Only use NGKs.....Does the car shake when its knocking or just a spark knock as in only you can hear it?
Last edited by Interceptor; 05-21-2009 at 10:22 AM.
#4
05-21-2009, 10:24 AM
whole engine shakes alot at low rpm higher up less shaking and the knocking is less noticable
nah was ngk was autolite platinum
nah was ngk was autolite platinum
#5
05-21-2009, 01:17 PM
updates now with codes
P0300
P0302
P0303
was 6 others b4 i cleared it to get current conditions and not what i caused while mucking about with it
also once i got back from autozone after the scanning was done
about a mile or so lots of lights though smoke coming from the engine bay the the second cat was glowing bright orange
P0300
P0302
P0303
was 6 others b4 i cleared it to get current conditions and not what i caused while mucking about with it
also once i got back from autozone after the scanning was done
about a mile or so lots of lights though smoke coming from the engine bay the the second cat was glowing bright orange
#6
05-21-2009, 01:42 PM
you have two cats on a 4 cylinder???
if your cat is glowing its melted by now and that would cause an additional loss of power. im sure it was glowing because of all the fuel being dumped in it from the misfires in cyl 2 and 3. running on 2 of 4 cylinders would also be the main reason for loss of power.
do you mean the sound goes away above 3k rpms? would you say it sounds like a diesel idling? your cam chain tensioner could be so worn that its throwing your cam timing off quite a bit and causing misfires.
if your cat is glowing its melted by now and that would cause an additional loss of power. im sure it was glowing because of all the fuel being dumped in it from the misfires in cyl 2 and 3. running on 2 of 4 cylinders would also be the main reason for loss of power.
a loud knocking noise sounds like from the head maybe further toward the back
the engine evens out at about 2.5K 3K rpm but still low on power
the engine evens out at about 2.5K 3K rpm but still low on power
#7
05-21-2009, 02:04 PM
anyway to check this out too see how bad the cam tensioner is worn?
at idle looks like a missfire engine is jumping arroun a bit and at low throttle it gets slightly worse for a sec but above 3K it stops the violent jumpping about
at idle looks like a missfire engine is jumping arroun a bit and at low throttle it gets slightly worse for a sec but above 3K it stops the violent jumpping about
#8
05-21-2009, 02:14 PM
take the valve cover off and look at the tensioner. it has two plastic runners that push against the chain. if they are all tore up and there are pieces all over, or if the chain is just very loose, then its bad.
#9
05-21-2009, 02:20 PM
had the cover off the other day and pushed on it a bit i do beleive it was quite tight when i did
no idea on the plastic parts though
gonna pull cyclinder 2 and 3 spark plugs and try new ones
would low compression on those 2 cyclinders cause a missfire?
no idea on the plastic parts though
gonna pull cyclinder 2 and 3 spark plugs and try new ones
would low compression on those 2 cyclinders cause a missfire?
#10
05-21-2009, 03:50 PM
update the car runs like a top changed the number 3 and 4 plugs again and now it purrs like a kitten as opposed to a kitten in a wood chipper