Stumbling?!

[punishercb]

For some reason my car is stumbling whenever I accelerate at full throttle. I really notice it in 3rd through 5th. It stumbles only at certain rpm's, the engine bucks and kinda stumbles. It doesn't shut the engine down, it just stumbles and then picks back up real quick. I really have no idea what is causing this. I only have a intake. I also used Sea Foam and that didn't solve the problem either.

Any ideas?

 

[eric_dsr]

change the plugs again the Bosch plugs are the worst ones you can by for any car use the NGK BKR6ES-11 had the same problem with it stumbling. Bosch plugs and boost leak were the cause. still trying to find boost leak

p.s. allways check the gap the one time you don't it will be wrong
the gap is good at .30

 

[1glaserturbo]

I had the same problem as you did. I went through and checked everything to make sure nothing was a miss. When I got to my 4th cylinder spark plug, it was melted . Atleast the part where the spark was actually made. I replaced it and the hesitation went away.


Good luck


Chris

 

[cool_g_83]

I was the second poster who had this same problem, but I fixed mine. I replaced the plugs with the ngk bpr6e or something like that (not the one range colder ones 7's). Gapped them to the factory specifics and boom, ran like a new car. Good luck if you are still having this problem, as this post is a little old