Installed Extractors now popping on acceleration....

[jmillf]

heyo...

VY SS installed new 1 7/8 extractors with 3" cats over the weekend, starts fine, idles fine, normal driving fine but when under load or accelerating hard there is a slight hesitation and exhaust pop/crack.

Any thoughts, exhaust leak, coils, plugs? Anyone else experience this?

Cheers

 

[lmoengnr]

Are all the plug leads clear of the headers?

 

[delcowizzid]

Did you take the plugs out to install the headers or just bang them into the plugs and crack one or 2 lol

 

[jmillf]

Plugs came out and leads all clear of header pipes. Mind you due to the size of the primaries they are close. FYI they are ceramic coated.

 

[mechanic]

Air leak into the exhaust. You have a leaking gasket.

 

[jmillf]

Idles fine runs fine under normal running. Took it for a drive tonight, now it’s hesitating or stuttering when under load low revs.

Does that still sound like symptoms of a header leak?

Cheers for the feedback.

 

[07GTS]

have u checked header bolts again after a heat cycle as the gaskets can move and u have to do them up again, also check bolt length into the head ive found some bolts can be tight but its because they are bottoming out in the head so dont actually tighten the headers up

 

[jmillf]

No haven’t checked header bolts. Will recheck torque on bolts tomorrow. That’s interesting, I used the same header bolts. Interesting to see if the flange thicknesses are different between the stock headers and the aftermarket.

Thanks for the info. Keep it coming!!!!

 

[vr304]

If you find no mechanical issues like exhaust leaks etc you may possibly need a tune, also those leads are very easy to break when taking them off the coil end perhaps you’ve damaged 1 or 2 taking them off

 

[jmillf]

Possibly, is there any way to test or inspect coil condition. I have read of an example where you start the car in the dark and check for arcing?