| Re: putting together my 355 LT1, questions |
Subject: Re: putting together my 355 LT1, questions by bam on 2012/7/24 22:20:58 Yes, thanks for asking. All back together and running, have driven it about 800 mi. The power improvement is really great. But I am having what I think is a tuning problem. From idle to 2000rpm it you are crusing the car jerks. It is especially bad in 1st thru 4th gears, still noticeable in 5th, not at all in 6th. Step on the gas even a little and it goes away or off the gas and it goes away, the jerking is very annoying at steady cruise below 2000rpm. I pulled the plugs and they are carboned up with a black soot that looks like it is running rich. My tuner has tried to tune this out, this is his 3rd try and not much better. At idle the lope of the cam sounds like something much bigger that a hot cam and the smell at the back end of the car is horrible and burns your eyes. Something else I noticed is that when I remove the filler cap for the gas tank there is no whoosh of air coming out anymore. No pressure at all. Today I checked the charcoal canister valve back by the tank, it holds pressure and air can be blown thru it like the FSM says. Also when I first turn the key on the fuel pump runs for over a minute before it shuts off, used to run only a couple of seconds. Fuel pressure is 42 and holds steady after you shut the key off. Any thoughts appreeciated. |
