Scanningr for codes
When I scan the computer where it shows ready to fire and all that, two lines show 025 and H025 not ready. Could this be a problem with the tune ( I am battling P0171 and P0174 codes) or is it something that was deleted? Also, does anyone have the part number for the vacuum port for the brake booster on a 2007 4.8. I would like to replace mine to eliminate a possible cause for my supposed vacuum leak. Thanks, Tbrown
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Re: Scanningr for codes
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Passenger side of intake manifold on side of top chamber is a vacuum port usually used as a blend door vacuum source....
If you dont need it, just plug it... What vacuum ports are you wanting to add? Power brakes ? :chevy::chevy::chevy: |
Re: Scanningr for codes
I am using that port for vacuum wipers. Not trying to add anything, just trying to find vacuum leak or cause for P0171 and P0174 codes. I have power brakes, and just want to make sure the swivel on the booster port isn't leaking vacuum.
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Re: Scanningr for codes
It's rare for the booster port o-ring to leak, Intake gaskets are common & the intake itself being cracked is very common on wreaking yard engines.
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Re: Scanningr for codes
Quote:
As clinebarger said...intake gaskets and intake manifold leaks, especially under the manifold... |
Re: Scanningr for codes
Already changed the intake gaskets, but will block off that port and try it. Thanks for the help.
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Re: Scanningr for codes
If the O-ring is leaking.....There really isn't a way to block it with the quick release mechanism & all.
Though your booster may be leaking.....Clamp/pinch the booster line to confirm. Can you watch live Fuel Trim Data?? A vacuum leak will show as high trim corrections at idle & correct under acceleration. Normal trims at idle & positive corrections under acceleration would be a fueling issue. (MAF, Injectors, Fuel Pressure) |
Re: Scanningr for codes
That is new information to me, I will check it out. Thanks
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Re: Scanningr for codes
Also make sure your pcv on the valve covers are hooked up as this will throw the codes.
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Re: Scanningr for codes
Subbed for new knowledge......
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Re: Scanningr for codes
they do sell a plug that will go into the booster hole(used on trucks with hydro boost) spot no longger sold by gm they are a dimond in the rough if u find one everyone wants good money for them i got lucky and soeone here on the fourm sent me one since im using manaul brakes still
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