Rough idle

[98sicklsc]

My 98 mk when it starts it idles up and down till it warms up and also has bank 2 lean code! I have replaced the intake gasket! Whatdo y'all think it could be?

 

[Mark8Murder]

Welcome and you have some Mark VIII Guru's a little ways away from you, drop LaserSVT and Sapperfire a line if your looking for somebody to do the work for you.

 

[slowmkviii]

I hope you have a good reason not to use the search function.
IAC.

 

[LaserSVT]

Iac

 

[philly0420]

Flux capacitor chit the bed. Gettin hard to come by these days

 

[Myco]

Do a vacuum check at a shop. Also, if you haven't done the O2 sensors replace the front 2 sensors.

After that check fuel pressure, and change the fuel filter. (fuel pressure is 30psi with fuel pressure regulators (small circular things on the fuel rails on top of the engine attatched and 39.5 with them off).

Clean your MAF sensor. Check your air filter. umm... do a seafoam treatment.

I'm betting I got it with one of these items. lol

 

[98sicklsc]

Thanks I will try the o2 sensors fuel pump and injectors are new and so is the MAF!

 

[98sicklsc]

IAC is new as well!

 

[LaserSVT]

Then you screwed up on the intake gasket. Did you replace the upper and lower? if so then pull it all apart and check again.
Also check the vac lines.

 

[98sicklsc]

Thanks y'all it was a rotted vac hose!

 

[slowmkviii]

Thanks for coming back on and telling us how you fixed it.