Can't Figure this one out.

[Brimark8]

Last night out of the blue my 97 MK8 started to idle funny. It his hesitating when you try to give it gas. There were two hoses that come off the intake that were rotted and I changed them but still doing the same thing. There is a funny sound coming from the air intake like a air sound or a sucking sound. Anyone have any ideas??????

 

[NoLimit95]

Take the air intake box off and look and while you have it off, clean the MAF with MAF cleaner.

 

[twinbopilot]

Check the IAC valve. If its sticky, you can clean it as opposed to replacing it.

 

[kustomizingkid]

Check for other vacuum leaks...

 

[slowmkviii]

Check for other vacuum leaks...

+1
or intake leaks or injector leaks

 

[lincolnboy]

Spray some carb cleaner on any vac lines see if the idle changes if it does that line Is leaking. But he did say he has a 97 pull the COP cover over and check each one for cracks replace if cracked

 

[Sapperfire]

All of the above

 

[BAD97LSC]

bet its a misfiring coil.

 

[Lownslowlsc]

All of the above

i agree

 

[Lownslowlsc]

bet its a misfiring coil.

had this problem happen a month or 2 ago and it was a coil...#7 was dead..didnt even have a cel wich was weird.

 

[Brimark8]

Jamie, you were right, #7 cylinder coil was gone. The good thing is I changed all the plugs and fixed a couple of other small things so it's running great now.

 

[ripped camel]

Great, glad you posted up what the result was.

 

[Sapperfire]

However, you mentioned a sucking sound, if this is a gen 1, they make noise due to a vacuum port in the throttle body, check near the front right of the intake manifold and see if there is black around behind the alternator where the intake gasket would be leaking