zlow6869

I just bought a 94 z28 with a lt1, the car sat for a long time due to a weak fuel pump, so I I had the a new one put in (trap door) car started good, and ran decent until I got out on the road and hit the gas pedal it would spudder but come right out of it, now here is where the problems start; drove the car 15 miles and it died, it fired back up, but it had a low coolant light on(coolant is full) so I had the codes ran and it showed code #43,42,36 so it was leading me to a new opti spark, so I took the car to my mechanic to have him look at it and 2 blocks from his shop it dies, so we towed it back and it sat for a week and he went to look at it and it fired right up and ran fine, well I went to get it, I could rev it up and it would still spudder and died again now its reading 0 fuel psi pump is cutting out for some reason...... any ideas? the car has a full tank of gas and new plugs and wires

djjab57

iTrader: (17)

Coolant light is no big deal, Just get a new one if you want mine has been on for years.I just did a head gasket job and it was running fine and then spuddering. I think it was do to still having air in the fuel line.

piotrekusa

Same thing happened to me.the problem was bad fuel pressure reg.

zlow6869

is there any way to test the fpr?

Lgoldtop

Check the fuel pump ground. Mine did that for a while only to find out the ground was corroded

ZFreie

Fuel filter might be wanna be changed as well, while your fiddling with the fuel system.

Here you go, talks about it all.

Fuel Pressure Testing http://shbox.com/1/4th_gen_tech2.htm...essure_testing

Also talked about how to check fpr here. https://ls1tech.com/forums/lt1-lt4-m...regulator.html