Fuel Pressure Issue
10-26-2005, 07:28 PM
#11
Senior Member
Join Date: Jan 2003
Location: union, new jersey
Posts: 8,079
wait, since i cant open the video, what kind of car is this we're talkin about again?
i doubt its the regulator, as previously suggested, even if you take the screw off the regulartor, pressure will not go down to 20psi.
martin
i doubt its the regulator, as previously suggested, even if you take the screw off the regulartor, pressure will not go down to 20psi.
martin
10-26-2005, 09:25 PM
#12
Senior Member
Thread Starter
Join Date: Jul 2002
Location: Fayetteville, Georgia
Posts: 2,483
Originally Posted by j9fd3s' post='773009' date='Oct 26 2005, 07:30 PM
you need a fuel filter thats meant for fuel injection on the car. efi runs at 50psi and a carb setup runs at 5psi... try a fuel filter for say an fc, or something fuel injected
Wow, that's a pretty ignorant mistake for me to make! I bet that's exactly what the issue is.
Fikse this is my Cosmo -> FB swap.
10-27-2005, 11:05 AM
#15
Senior Member
Join Date: Jan 2003
Location: union, new jersey
Posts: 8,079
i helped my friend install a TII motor into an 82, and we used a gsl-se fuel filter in the car. fuel pressure was at 40 (before other issues came along, rusty fuel tank). so you might want to take a look inside your tank too, make sure that the thing is not rusting and clogging your pickup filter, and eventually ******* up your injectors and eventually your motor.(tahts what happenned to his car).
10-27-2005, 05:39 PM
#16
Senior Member
Join Date: Dec 2002
Location: Wayne, NJ
Posts: 4,837
Originally Posted by FikseRxSeven' post='773185' date='Oct 27 2005, 12:05 PM
i helped my friend install a TII motor into an 82, and we used a gsl-se fuel filter in the car. fuel pressure was at 40 (before other issues came along, rusty fuel tank). so you might want to take a look inside your tank too, make sure that the thing is not rusting and clogging your pickup filter, and eventually ******* up your injectors and eventually your motor.(tahts what happenned to his car).
and it was definitely carbed before hand? i dont remember when the carbs went away
kevin.
10-30-2005, 11:37 AM
#17
Senior Member
Join Date: Oct 2003
Posts: 352
At least one of Aeromotive's regualators comes with two springs. One for low, carb pressures and another for high, FI pressures. If your's came with two springs and it has the wrong one in you may have the carb spring bottomed out and it simply just won't make any more pressure. Also, is it possible you just bought the wrong regulator? What is the model number?
10-31-2005, 09:23 AM
#18
Senior Member
Thread Starter
Join Date: Jul 2002
Location: Fayetteville, Georgia
Posts: 2,483
Thanks for the advice guys. I installed a fuel filter from a TII and was able to adjust the fuel pressure just fine.
It idles a lot better with lower fuel pressure...I actually have to put my foot on the throttle to keep it idling with 50psi of pressure. Does that sound right at all?
It still doesn't like to rev but it needs some tuning I'm positive haha. I'll work on getting it rolling now and then getting it to a dyno.
It idles a lot better with lower fuel pressure...I actually have to put my foot on the throttle to keep it idling with 50psi of pressure. Does that sound right at all?
It still doesn't like to rev but it needs some tuning I'm positive haha. I'll work on getting it rolling now and then getting it to a dyno.
10-31-2005, 05:40 PM
#19
Senior Member
Join Date: May 2002
Location: California
Posts: 22,465
Originally Posted by Dysfnctnl85' post='774200' date='Oct 31 2005, 07:23 AM
Thanks for the advice guys. I installed a fuel filter from a TII and was able to adjust the fuel pressure just fine.
It idles a lot better with lower fuel pressure...I actually have to put my foot on the throttle to keep it idling with 50psi of pressure. Does that sound right at all?
It still doesn't like to rev but it needs some tuning I'm positive haha. I'll work on getting it rolling now and then getting it to a dyno.
if it ran "ok" with 20psi of fuel pressure, and then it doesnt with 50psi, its prolly too rich with 50psi.
10-31-2005, 05:41 PM
#20
Senior Member
Join Date: Oct 2003
Location: Canada
Posts: 3,502
Fuel injectors work the same no matter the fuel pressure, so if your pressure is lower, and the injector opens for a millisecond, it's just squirting in less fuel than if the pressure was doubled
Sounds to me like you should increase the pressure and back off the injectors. You base map for idling is too rich at the proper pressure. So, if the pressure drops, and you haven't touched the fuel map, it will be closer to the proper ratio, so it idles better.
Sounds to me like you should increase the pressure and back off the injectors. You base map for idling is too rich at the proper pressure. So, if the pressure drops, and you haven't touched the fuel map, it will be closer to the proper ratio, so it idles better.