engine dies when braking hard

Bob Malmen · #1 (**permalink**) 08-23-2009, 04:10 PM

Good to hear from you Jerry. I'm having almost the same issue upon hard braking. Also when I come to a stop under normal braking the idle hangs around 1100 and then will come down to 900 after about 30 to 60 seconds.

After your comments my fuel pressure maybe to high at 9.5 psi? I have a holley with a return setup. Any thoughts?

zrayr · #2 (**permalink**) 08-24-2009, 06:19 AM

Quote:

Originally Posted by Bob Malmen

Good to hear from you Jerry. I'm having almost the same issue upon hard braking. Also when I come to a stop under normal braking the idle hangs around 1100 and then will come down to 900 after about 30 to 60 seconds.

After your comments my fuel pressure maybe to high at 9.5 psi? I have a holley with a return setup. Any thoughts?

I have seen 8 lbs as the upper limit for stock Holley needle & seat (non-supercharged application)

Z.

Ron61 · #3 (**permalink**) 08-24-2009, 06:37 AM

Quote:

Originally Posted by Bob Malmen

Good to hear from you Jerry. I'm having almost the same issue upon hard braking. Also when I come to a stop under normal braking the idle hangs around 1100 and then will come down to 900 after about 30 to 60 seconds.

After your comments my fuel pressure maybe to high at 9.5 psi? I have a holley with a return setup. Any thoughts?

I had much the same problem as you do except my idle returned to the normal immediately. After looking at my fuel pressure I saw it was running over 8 pounds and Holly told me to keep it around 6 1/2 to 7 so I set it at 7 and never had another problem after that. Your fast idle would almost sound as if you are still getting fuel for a few seconds before the feed shuts down to idle.

Ron