Hey guys,

I am experiencing the P0171, 172 codes along with P2195 and 97. can hear pretty substantial vacuum leak, cannot pinpoint. RPM increases when I spray the back side of bank 1. still cant pinpoint difinitively. is there a vacuum port back there, or is my fear of a bad intake gasket coming true ?

 

How's the PCV elbow at the back of the intake under the throttle body?

 

glc,

I think my elbow is on the side of my TB. (Bank 1) could be wrong. will check behind the TB tomorrow. Thanks.
________
04 5.4

 

glc,
I experienced one of those no start hissing backfires you read about here alot. Does that lead you to think of any other possible leaks? I am spraying areas with carb cleaner but wondering if the overspray is effecting other areas. wont idle on its own long enough to do a lot of searching. Thanks for any ideas.

 

Check all the connections/hoses between the MAF and the Throttle Body.