Car stuttering at WOT

[planblars]

this just started happening this week

when i am in between the RPM range of 5500 and 6500 at wot my car will kind of backfire or studder through those points almost like fuel cut is about to kick in but it doesn't my rpm's keep rising but they will jump back a tiny bit the go forward jump back a tiny bit and then go forward again this has never happened before and i haven't changed my tune at all soo im not sure what is going on

 

[GTM]

this just started happening this week

when i am in between the RPM range of 5500 and 6500 at wot my car will kind of backfire or studder through those points
...

When was the last time you changed or checked spark plugs?

Cheers,
GTM

 

[Defiant]

There is no "studder".

 

[95gstnotwalkin]

the EXACT same thing is goin on with my car so if anyone knows.?.?.?.?? Thanks Matt

 

[planblars]

i changed my spark plugs about two months ago i didn't think to pull them out and check them...i will look into that and see if its just that

is there any thing else that could be doing this?

 

[GTM]

i changed my spark plugs about two months ago i didn't think to pull them out and check them...i will look into that and see if its just that

is there any thing else that could be doing this?

I failed to mention that a "backfire" in the exhaust suggests an exhaust leak or a lean condition where there is enough air to support further combustion. You can try having someone hold a wet rag with a stick in the exhaust to increase the back pressure to look for leaks. In difficult areas such as the exhaust manifold you can use a "listening hose" to better pinpoint the source, it also may take increased rpm to get the needed pressure.

Cheers,
GTM

 

[planblars]

you know it could be that i did just change the manifold to block gasket not that long ago maybe there are a few other leaks as well

 

[Patterson]

sounds like a timing problem. the car is misfiring. check the timing.

 

[GTM]

sounds like a timing problem. the car is misfiring. check the timing.

Do you want to explain your theory how this would cause these complaints??

Cheers,
GTM