ok so yesterday i go to start my car and it takes about 6 seconds to actually start up and im like wut the ***?? anyway i didnt notice until later that when idling my rpms are jumping from 500-800 and my car shakes enough to feel it. and see my legs shake. i have no idea what this is, is it a timing problem? any1 please help?

oh also i just got 2 hi flo cats, and a mid muffler delete, could this cause a problem? this didnt start to occur until about a week after my install.

thanx guys any comments appreciated im very concerned!

oh and its for a b5 2.8

 

oh and when i let it idle and step outside to hear the exhaust it sounds like its about to stall cause the rpms are moving so much

 

Try and clean your MAF. I'd check for exhaust leaks too.

 

Could be a vac line leak...(yes i know its 2.8.) Best thing to do first without getting your hands dirty is to get your ecu scanned for fault codes, just because you dont have a CEL doesnt mean there arent bad things going on. Take about 10 mins. and check around under the hood to make sure all hoses are connected. MAF is a good possibility, do you have a K&N filter by chance? Sometimes they get over oiled and mess up the MAF. Check all hoses going to airbox.

 

ok im gonna check the MAF i already looked for any lose/disconnected hoses everything seems good. im pretty sure its the timing but im not positive after i check the MAF if thats not it im gonna take it to my garage and see wut they think. maybe iot just needs a tune up