i got a 99 nbs sierra and swapped a 6.0 into it. since the swap it starts hard and it getting way to much gas. only starts when i hold the throttle wide open. and then smells like gas. no codes thrown but also have cats deleated and tune shuts the light off so not sure if code would be thrown for 02 sensors etc... and getting 10 to 11 mpg driving daily.
check the fuel pressure regulator to see if its leaking. Pull the vacuum hose off the intake while it's idling and see if it's pushing any fuel out of it. You could also try replacing the cam sensor to see if that's the issue with the hard starts.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
It's way to rich and when you hold it wide open on start it goes into "flood clear" mode or whatever it's called and shuts off the injectors.
01 Silverado
True. Also, when you go WOT the pcm reverts to the open loop tune and pays no attention to the 02 sensor feedback.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
i dont have any fuel leaks and have good pressure. when you said to pull the vaccum line which one on there did you mean?? so a good start would be to try cam sensor, then maybe 02 sensors??
Disconnect the vacuum line that is running from the intake manifold to the fuel pressure regulator. Start the engine and and let it run and go out and see if fuel is leaking out of the vacuum port that is on the fuel pressure regulator. I guess I need to write a tech article for this and have it stickied.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
i owe you big time!!! havent beenable to figure this problem ou fr over a month> brought it to a dealership an a few smallshops an no one culd figure it out. but i just checked that and the fuel pisses right out of it. swaped it with the one off my 5.3 i swaped out and fires right up! is there any damage done by having fuel rn into there for so long??? or anything else i should o or just run it????
THANKS AGAIN REDHEARTBEAT!!!!
Id probly swap in some new plugs now that prob fuxed as the old ones prob gas fouled
Change your oil because all that fuel has gone down there and diluted it.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
x2 on the oil change
Posting Permissions
Reply With Quote