Just done oil change and put race system on and car wont run smoothly?

[Carbonraider]

Right, Just changed my oil and put my yozza on! Started car with a big bang out the exhaust! Left it for a min started it again and now idles roughly below 1000revs. When reving sound like it strugling and also sound like it misfireing. No lights tho! Anyone help!!!!

Cal

 

[Cro]

Sounds like you might have left a connector off or something. Checked lambdas? Didnt change anything to do with the ht leads or coilpack did you?

 

[Carbonraider]

Just found out problem, Gasket under plenum was leaking causing a airleak. Anyway problem fixed now fanks for your advise tho!

Cheers Cal