shutzero

so i posted a couple weeks ago about having a sputtering startup...
so i would prime the engine twice and it would start up fine, but if i dont prime it or sometimes only prime it once it sputters or something...im thinking its either the fuel pump regulator or the fuel pump...does anyone know if this is a specific problem for either or if its something else?

RamAir95TA

iTrader: (2)

Have you gotten a fuel pressure gauge on the rail and checked for fuel pressure, both key-on engine-off and with the engine running?

Have you pulled the vacuum line off of the regulator and checked for fuel?

shutzero

havent had a chance to yet, i was hoping maybe they were symptoms of something common...what would the pressures be with key on engine off and engine running?

RamAir95TA

iTrader: (2)

Approximately 43.5psi with the KOEO. Pressure should drop a few psi with the engine running and slowly increase with throttle position.

shutzero

like i know it primes it and gets fuel from the gas tank but im thinking maybe its not priming the right amount or something?

RamAir95TA

iTrader: (2)

The only way to tell is to get a fuel pressure gauge on the fuel rail. It's a priceless tool that every LT1 owner should have in their toolbox.

doug1105

Yep- check the pressure at idle and when you drive.
Mine did the slow die-off and would look okay at idle, but would eventually shut off while driving.

shutzero

Once I get the car started itn runs fine ithink it has something to do with the pressure at start up

ThoR294

iTrader: (6)

check valve in fuel pump could be bad... that is normally the cause of quick pressure loss

shutzero

all the pressures are fine, i think its actually the starter. when i let the car prime i hear something clanking under the car likes it almost the starter engaging...is this possible? it sounds like the starter gear is getting stripped or something on the flexplate

RamAir95TA

iTrader: (2)

Pull the inspection/converter cover and find out.