496 Fuel Pressure
09-03-2007, 10:36 PM
#21
Registered
Thread Starter
Join Date: Aug 2005
Location: Sandusky, OH
Posts: 225
Likes: 0
Received 0 Likes
on
0 Posts
Am still trying to figure out where my fuel pressure is going after the the ignition is turned on and the pump cyles off.
I replaced the boost pump, not it.
I pulled the fuel rail and injectors out of the intake manifold to make sure one wasn't leaking and they are all dry as a bone under presure as the pumps are running.
No fuel leaks anywhere. I did notice that under closer inspection the pressure actually goes up to like 47 or so while the pumps are running. Once they cycle off it drops fast.
Can hear no signs of an air leak once the pumps shut off.
has perfect 43 psi at idle on hose and runs good. Just starts hard occasionally when hot.
What else is left? Pressure regulator on top of the fuel cooler?
I replaced the boost pump, not it.
I pulled the fuel rail and injectors out of the intake manifold to make sure one wasn't leaking and they are all dry as a bone under presure as the pumps are running.
No fuel leaks anywhere. I did notice that under closer inspection the pressure actually goes up to like 47 or so while the pumps are running. Once they cycle off it drops fast.
Can hear no signs of an air leak once the pumps shut off.
has perfect 43 psi at idle on hose and runs good. Just starts hard occasionally when hot.
What else is left? Pressure regulator on top of the fuel cooler?
09-04-2007, 02:40 PM
#23
Registered
Join Date: Aug 2007
Location: duncan, ok
Posts: 12
Likes: 0
Received 0 Likes
on
0 Posts
had the same problems and it was the crank sensor. changed it 2 weeks ago and all is running good now. I went ahead and purchased the cam sensor but will have to disassemble some seats to get to it.
09-04-2007, 10:27 PM
#25
Gold Member
Gold Member
Join Date: Sep 2005
Location: Missouri
Posts: 1,987
Likes: 0
Received 0 Likes
on
0 Posts
I have no clue if the fuel pressure leak down id related to the hard start issue but the fast leak down is not normal and may be indicative of other maladies with the system that is. The fuel pressure regulator could be the faulty item as suggested.
09-10-2007, 07:17 PM
#28
Registered
Thread Starter
Join Date: Aug 2005
Location: Sandusky, OH
Posts: 225
Likes: 0
Received 0 Likes
on
0 Posts
Did you get your oil pressure problem figured out?
09-10-2007, 08:36 PM
#29
Registered
Join Date: Jul 2005
Location: evansville In
Posts: 482
Likes: 0
Received 0 Likes
on
0 Posts
Turnernd, Yes just loosen the two nuts that hold the cool fuel to the block and it will pull out enough to get that cover off. You can change out the reg. without taking it all the way out . ..Yes figured out loss of oil press. on 496?....Motors where not "pickeled" as said they were. Alot of junk on pickup screen.
09-10-2007, 10:08 PM
#30
Gold Member
Gold Member
Join Date: Sep 2005
Location: Missouri
Posts: 1,987
Likes: 0
Received 0 Likes
on
0 Posts
What kind of junk?
Turnernd, Yes just loosen the two nuts that hold the cool fuel to the block and it will pull out enough to get that cover off. You can change out the reg. without taking it all the way out . ..Yes figured out loss of oil press. on 496?....Motors where not "pickeled" as said they were. Alot of junk on pickup screen.
