Chasing Phantom Leaks

[GSpence2]

2004 CTT

Changed boost pipe seals because they were leaking

Changed diverter valves because they were leaking

New filters plugs & coils but I’m getting behavior like multiple misfires and Durametric codes P2236, 2238, 2225, 2227

Time for O2 sensors?

[GSpence2]

Okay so for anyone following this thread problem solved! Smoked the engine and found big leaks between the MAFs and the intercoolers and again at the plenum before the throttle body. New seals replaced leaky pipes and hoses and voila! No more codes no boost leaks power drops and hesitation and smoother shifting too

Edited April 16, 2020 by GSpence2

[ekstroemtj]

Thank you for updating and information. 

[bigfoot007]

when you smoked the engine where did you introduce the smoke?

[GSpence2]

I apologize for missing your question. We tried a few different ways. I have cold air intakes on with these large 6" come filters the easiest thing to try first was to remove a filter and intro smoke that way. Next we pulled off the bellows at the Y-pipe - I have an IPD plenum on - and put the wand in both sides traveling down to the MAFS and intercoolers.We pulled the IPD plenum off and got the wand through the throttle body to smoke the intake runners. Finally we pulled off the connections to the air injection pumps to see if there were any leaks at the CATS. A bit labor intensive but worth it.

[bigfoot007]

Thanks, I will have a go during lock-down, gives me something to do!

[GSpence2]

Exactly!