Poor idle ONLY when driving
#21
Racer
Thread Starter
Yessir. Thanks for all the help man, much appreciated. I'll post an update when everything gets installed.
#22
Racer
Thread Starter
Well... New FPR diaphragm installed along with new Delco fuel pump and pressure/idle issues persist. Reads 35psi at idle and as it revs, drops down to 30psi and wants to choke out on idle. Don't smell gas in the vac line going to the FPR. After running, Pressure begins to drop quick, about 15 psi in a minute and by 5 minutes pressure is on 10, settles down on about 4-5 at 20 mins. All those readings are with the new regulator and pump. It has a brand new set of rebuilt Bosch D3 32lb injectors from FIC, so I hate to think one of them is leaking. At this point, i'm fresh out of ideas and need some help. I hate to take it down to the local speed shop to get sorted out, but figure one more shake before that happens. Thoughts?
#23
Well... New FPR diaphragm installed along with new Delco fuel pump and pressure/idle issues persist. Reads 35psi at idle and as it revs, drops down to 30psi and wants to choke out on idle. Don't smell gas in the vac line going to the FPR. After running, Pressure begins to drop quick, about 15 psi in a minute and by 5 minutes pressure is on 10, settles down on about 4-5 at 20 mins. All those readings are with the new regulator and pump. It has a brand new set of rebuilt Bosch D3 32lb injectors from FIC, so I hate to think one of them is leaking. At this point, i'm fresh out of ideas and need some help. I hate to take it down to the local speed shop to get sorted out, but figure one more shake before that happens. Thoughts?
you could blow the lines out towards the fuel filter after its been removed in case you have a blockage.
what happens to fuel pressure after you turn key band pump primes but you do not start.
#24
Racer
Thread Starter
was the sock replaced? and when is the last time the fuel filter was replaced.
you could blow the lines out towards the fuel filter after its been removed in case you have a blockage.
what happens to fuel pressure after you turn key band pump primes but you do not start.
you could blow the lines out towards the fuel filter after its been removed in case you have a blockage.
what happens to fuel pressure after you turn key band pump primes but you do not start.
#25
Racer
Thread Starter
Fuel pressure issues are resolved. Bought a new FP gauge and between installing a new pump and FPR diaphragm, pressure will hold at 35 on idle, 44 idle with vac line removed. Pressures will rise appropriately on rev and hold steady on constant throttle. Still have some pressure bleed down when I key off, but at least the car runs well and won't stall out under minimal loads.
Thank you all for the time in reading this as well as all the tips you've offered. It is much appreciated
Thank you all for the time in reading this as well as all the tips you've offered. It is much appreciated
#27
Team Owner
I think he was trying to compensate for the mods but I would think 24pph would have cut it although, if he has it adjusted in his EPROM, would it matter much?
#28
Racer
Thread Starter
Just like the the above reply, the engine is a 383 build. It's a mild 383 at the moment but I plan on new heads and intake in the near future. It has the PCM flashed for the current configuration and runs clean. Who knows what else I'll throw at it in the future. Just wanted the peace of mind that I had plenty of injector as I progress
#29
Team Owner
I'm running 42 phone on my 383.
#30
Racer
Thread Starter