kman456

OK thanks Scotty and 18psi I will check all of that today.
My injectors are denso injectors brand new only 200 miles on them

But when I pull intake I will check them

kman456

Turbo compressor and turbine are clear.
manifold has normal sludge build up nothing overly excessive

18psi

iTrader: (76)

is it lean when its stumbling at idle too or just when you rev it/

kman456

Its weird sometimes it will idle fine at 14:1 and then I rev it barely and it will go lean.

If I ease into throttle it will stay 14:1 not in gear until I hit 2k rpm

And then sometimes it will go lean right when I start it. Gets worse the warmer engine gets

18psi

iTrader: (76)

might be a malfunctioning tps or maf sensor too, but with the crappy fic I dunno

kman456

Fix has tips sensor output percentage and it shows it to be working.

kman456

FIC*

kman456

And my MAF voltage isn't spiking or diving. I did notice my voltage drops to 12.1 when it wants to die at idle

kman456

I'm pretty set on the intake manifold leaking somwhere

18psi

iTrader: (76)

Possible, but a vacuum leak past maf normally makes the rpm jump up, not dip down. although if its big enough to cause the car to run uber lean I guess it could dip town too

this goes back to my suggestion of doing a boost leak test

kman456

What's best way to do boost leak test I've seen it done couple ways

18psi

iTrader: (76)

there is only one way to do a boost leak test properly.

what ways did you see?

kman456

Seen one guy blow smoke into engine bay and smoke migrated to leak. Didn't work as well as pressurizing pipes with air and capped off coupler on turbo inlet.

18psi

iTrader: (76)

Well ideally a smoke test is best. You pressurise the piping with smoke and its ez-pz. or just pressurise with air and listen/feel for the leaks. or pressurise with air and spray all places that can potentially leak with water or soapy/bubbly water.

either way

kman456

OK I think its a combo of problems
Thanks guys gave me good basis to go from

kman456

Pulled the head and I think it was head gasket car had 140k on it and head gasket looked pretty rough and I didn't even have to pry head of as soon as I loosened head bolts it came loose

fooger03

iTrader: (2)