7.4l stalling at stop signs. Fuel pump?

[Captanmactavish]

My 98 big block started stalling at stop signs. Runs mint any other time and only stalls half the time. What could be the problem be? Fuel pump? Injectors? Could a fuel system cleaner help?

 

[454cid]

Any codes?

 

[Captanmactavish]

Engine light was on when I picked it up from the shop the other day, went away at some point and stayed off. I'll plug a computer in this afternoon. And last night I found I was leaking trans fluid, pretty bad too. Don't think it could be related though.

 

[thegtwyo86]

Check your egr valve my 5.7 was doing the exact same thing you can either replace it but go with a dealer part. Or remove it all together an block it off.

 

[Captanmactavish]

Just got the tranny fixed in my truck. Once I start driving again I'll see if it still stalls and look back into it.

 

[someotherguy]

I yard-drove a '96 with Vortec 7.4 with a fuel pump so bad it was only making 30 psi. It wouldn't stall. It would fall on its face if you didn't ease into the pedal, but I could drive it around the yard fine in order to move it around. So in other words, unlikely to be the fuel pump. The Vortec 7.4 will run on pressure far below spec because the factory injectors will still operate; they're totally different from the central injector and poppet valve setup original to the small block Vortecs.

Richard