feature request - fuel pump priming time

[Yves]

Would it be possible to have the time the fuel pump primes to be set by the user ?

[jsmcortina]

Use the delayed injector priming pulse.

James

[Yves]

Use the delayed injector priming pulse.

James

That only provides up to 3 seconds.

[jsmcortina]

Sounds like something is wrong with your fuel system if you need that much priming. (3 seconds delay + 2.5 seconds pump timeout)

James

[Yves]

http://www.msextra.com/forums/viewtopic ... ve#p459754

[krisr]

I had the exact same problem with my old Aeromotive reg. Getting rid of it fixed my problem

[Yves]

I had the exact same problem with my old Aeromotive reg. Getting rid of it fixed my problem

What did you buy instead ? It's not exactly a cheap part.

[krisr]

I think it was a Magnafuel? I ended up scrapping the fuel system and went with a fuel system from a late model VE Holden commodore / Pontiac G8. Everything is inside the fuel tank (pump, reg, swirl pot) and it only has 1 line going to the rails. Contrary to popular belief, I've not had 1 issue at all with a dead head system, the pump is dead silent and the fuel sender ohms work with an Autometer gauge. The system holds pressure for days aswell so I only use a prime delay of 0.5sec before priming the injectors.

[tpsretard2]

earomotive regulators are absolute s***!!!!! get a fuel labs one.

Unless you are running an all out racecar with e85 and stupid large injectors, you could also convert to a dead head system..

[Yves]

Seems like the machining of the seat of the valve is to blame for this :

http://www.evolutionm.net/forums/evo-en ... lator.html

[slow_hemi6]

Man that is terrible QA from Aeromotive. Cheap manufacturing in action.

[Yves]

Man that is terrible QA from Aeromotive. Cheap manufacturing in action.

I think that's a fake one.

Here is link to another site where I asked a question with a correct Aeromotive one :
http://www.speedtalk.com/forum/viewtopi ... 19#p589019

Anyway, it seems like they are made not to hold pressure.

I haven't opened mine, but unless Summit Racing is selling fake Aeromotive stuff (which seems hard to believe but who knows these days) I have to think I have an original one. Didn't use a one way valve after the pump as I seem to remember the pump (A1000) should be fitted with one inside. Maybe adding one will help some.

[Jeep-Power]

I second a adjustable fuel pressure prime time. I have a Jeep I-6 (4.0l) , on which the vapor lock is almost legendary (not s aying mine is legandary- that alot of jeeps have this issue)

I have been using ASE to help it not run so lean after hot-start. Also, I have made a flow through fuel system, but the problem still exists, to a lesser degree, in the summer. I think having the fuel pump run a few extra seconds will help with the hard starts.

Installing a dash mounted momentary switch in the fuel pump circuit has crossed my mind. It would be really nice if it was automatic. Even nicer if it can optionally be set according to engine and/or manifold temps.

[Yves]

Guys,

After some time dealing with other things I went at this again. The hard starting issue is less because right now my low pressure pump almost always runs with the contact in on position. Not sure why but it does help.

Since I have a FPDM in there to regulate fuel pump speed (which works fine BTW) I noticed that anything below full speed would reduce my fuel pressure.... This surprised me, but I seem to get the hang of why. Namely fuel pressure at the FPR was set at idle with the FP at full speed and the lowest amount of fuel use so the maximum amount of returned fuel.

Looks like I need to set the fuel pressure at idle and run closed loop.

Any ideas.