Misfire only at idle...?
Thread Starter
10 Second Club
Joined: Aug 2005
Posts: 567
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From: Tennessee Tech
Misfire only at idle...? I used hptuners today and it came back that cyl. 4 & 5 were misfiring, so i replaced the plug wire and plug on 5 scanned it again and it didn't help... Anyone know of what i should try next? I check the history of cyl. 5 and its had almost 60k misfires...
But thing is, when i get the rpm's to 1600 the misfire goes away... I also swapped a coil pack from cyl. 1 to 5 just to make sure it wasn't bad and it didn't change a thing.
But thing is, when i get the rpm's to 1600 the misfire goes away... I also swapped a coil pack from cyl. 1 to 5 just to make sure it wasn't bad and it didn't change a thing.
TTT
Anyone got any ideas on this?
My son is having a misfire issue with his car. He says it will quit misfiring when he is on the gas around 3000 RPM and then when it straightens up he says it the car runs really good. This low speed misfire is killing the around town driving. We have changed plug wires and plugs and this has not changed anything.
Thanks for any help.
Anyone got any ideas on this?
My son is having a misfire issue with his car. He says it will quit misfiring when he is on the gas around 3000 RPM and then when it straightens up he says it the car runs really good. This low speed misfire is killing the around town driving. We have changed plug wires and plugs and this has not changed anything.
Thanks for any help.
TECH Apprentice
Joined: Oct 2007
Posts: 303
Likes: 0
From: eastern ky
if its only on one cylinder you could have a clogged fuel injector, pull the #5 fuel injector out of the intake and see if it gummed up any. if that dont work you may want to have a compression test done on the cylinder to make sure theres not a problem with the cylinder
Just to add to the thread so I can close out our part of this problem. We cured the miss by replacing the O2 sensors and it is fixed. He drove it the last two days and reports no misses and no problems. He actually used rear corvette 02 sensors as replacements for the front sensors on his camaro.
