CHEVRACER83

Have You Checked The Fuel Pump Relay?

Formula350

iTrader: (3)

I'm not sure, but I think relays work, or don't. Much like fuses. I don't think there is a "half ***" with them.

Like I said for fuel related, I think it'd have to be the regulator, if not that, a rrrrrreaaaaaaaallllllllllllyyyyyyyyyyy plugged up fuel filter.

BTW you ever stuck a fuel pressure gauge on it and turned the key forward (just before starting)? Do that, see if it brings it up to 43psi and holds.

CHEVRACER83

Could Also Be The Check Valve In The Pump.... Allowing Fuel To Flow Back Into The Tank.....

Formula350

iTrader: (3)

Yea, that's kinda why I mentioned the regulator. If it's torn, or what have you, it won't keep pressure like a bad fuel pump.

It just could be so many things

F8L LT1 Z28

I would say bad opti + bad coil. Also clean the MAFS and when they fixed the fuel pump did they put a new fuel filter on the car? that is all I can think of

F8L LT1 Z28

this is the opti, Well a new one

Formula350

iTrader: (3)

But keep in mind, you can't see it. If you remove the intake elbow, you can see part of the top though lol

That_guy

iTrader: (1)

Ok are yall sure its the opti , and the fuel pump is brand new but there mite be something wrong wit it.

dhdenney

iTrader: (53)

NO! This is not a garage, everyone is just speculating. Go ahead and take it to your mechanic friend and maybe mention those couple things as potential problems but there's no way we can know for sure.

Formula350

iTrader: (3)

+1. No one here an say for sure what someone elses problem is. We can have an educated guess, or we can just toss out theories. If someone here gives a possible solution, and you pursue it, and the **** hits the fan, you can't blame anyone here.

All we can do is offer ideas and wish you luck.

That_guy

iTrader: (1)

im not goin to blame any of you but i do think its the filter tho but imma take it to him and explain everything.

Formula350

iTrader: (3)

Filter is easy enough that you can do it. Assuming you have at least 2 wrenches or 1 and a crescent It's just under the car towards the back. Follow the fuel lines and it'll lead you right to it. Being so easy, that's not worth paying someone, even a friend But if he's willing to do it free, then by all means lol

That_guy

iTrader: (1)

ok i need to get some jackstands man. BTW do you think its wise to mod a 259.000 mile motor

Formula350

iTrader: (3)

As long as you keep enough money to rebuild it when it goes. You'll have the upgraded parts already then. If it's highway miles it's not AS bad, but still even if they were all highway that still equates to around 200K.

That_guy

iTrader: (1)

yea its mostly highway.

dhdenney

iTrader: (53)

Well put it like this. If it's got that many miles on it, and you decide to do heads and cam, might as well pull the whole damn thing and just have it all fresh. If it's just bolt ons, sure. But if you're going real far in, might as well go all the way.

Young_Z28_Racer

i bet its the opti but just liek everyone else is saying take it to someone and they'll find out for ya... when i first got my car i was driving it and parked it, walked out and wouldn't start anymore. bought a fuel pump, regulator. and that **** and still nothing... then a friend said dude change your opti and i said why! its still has spark and he said jsut change it. so i did and it fixed it! crazy huh!

Young_Z28_Racer

holy **** bat man! thats alot of miles! isn't that some kind of record for having a LT1 last that long! good hell!!!! mine lasted till 90,000 and i thought that was good hahahaha...

(in other words take it out and refresh it before you mod it, if not i'm sure you'll spin a bearing or something)

Formula350

iTrader: (3)

Dude, I BOUGHT my car with 94K because that's still fairly NEW for an LT1. People still put NOS on theirs @ 150K. 200K is the old 100K for the SBC

Young_Z28_Racer

lol it was more as a joke more then anything else lol... mine blew up becasue i through to big of a shot on it lol... but here in utah LT1's don't last very long??????