Intermittent Misfire
#1
Intermittent Misfire
My car misfires under load. Usually in 3rd or fourth gear. Seems like it stumbles and if I give it too much gas there is a popping noise. I'm thinking its backfiring. I check the ignition system and coils, good. Checked all plugs and wires, thats good. Good fuel pressure. No vaccuum leaks that I could find. Not a clogged filter checked those. Any idea? I was thinking maybe a bad fuel injector but would that cause a popping noise like that?
#4
My car misfires under load. Usually in 3rd or fourth gear. Seems like it stumbles and if I give it too much gas there is a popping noise. I'm thinking its backfiring. I check the ignition system and coils, good. Checked all plugs and wires, thats good. Good fuel pressure. No vaccuum leaks that I could find. Not a clogged filter checked those. Any idea? I was thinking maybe a bad fuel injector but would that cause a popping noise like that?
That stumbling/popping is a misfire. You may have a cracked spark plug. You should recheck your spark plugs and look for hairline cracks in the porclain or black marks where the porcelain goes into the plug. Or go buy another set of plugs. Did you use a TQ wrench for tightening them or just crank them in?
Thread
Thread Starter
Forum
Replies
Last Post
Omgitsa88Stang
5.0L General Discussion
5
10-05-2015 07:33 AM
zanemoseley
2005-2014 Mustangs
6
09-06-2015 12:58 PM