At the shop trying to get the Cobra running again (long story, basically intercooler cracked).
Related Mods:
Whipple 03-03 Cobra kit w/ 3.0 pulley
60# injectors
Diablosport MAF
PPRV Delete
Kenne Bell Boost-a-Pump @ 50%
Details:
- Everything is hooked back up
- I can hear the pumps prime when key in on position
- We see a small surge in pressure but drops off
- If we cycle on/off quickly we can get the fuel pressure to spike pretty high but then instantly drops
- no leaks
- when cranking there is no fuel pressure
- I do have a BAP and it seems to be ok
- fuses and relay seem fine
- Tried swapping FRPP just to be sure
Update:
- checked the relay by the FPDM and it's getting 12v
- getting code P0193, but not sure the FRPS is blown as there is no gas in the vacum line
- all fuses are fine
- vacuum lines all seem fine
- no leaks anywhere
- with pressure guage connected to the fuel rail, I'm seeing little to no pressure when priming (key in on position and I can hear the pumps prime), if I cycle on/off, on/off I can get the pressure to build but instantly drops to zero.
- when cranking there is zero fuel pressure
Current plan is to drop the fuel tank Monday and see what we can find there.
Update #2:
- Dropped tank
- All hoses are fine
- Pumps prime when car keyed on
- Pumps are NOT running when car is cranking
Update #3
- Confirmed we are getting 17v out of the FPDM (with BAP set to 50%) and 17v at the fuel hat connector.
So the only thing I can think of now is that the pumps are shot. But how do 2 pumps die after sitting for a year?
Update #4
- We powered pin 10 and grounded pin 3 on the unplugged FPDM connector, the pumps ran fine and held 60psi.
Update #5
- replaced the FPDM, still doesn't work (see latest thread post for more details)
Update #6
- Replaced the FRPS (again), the code is now cleared (no longer getting P0193), but still not getting fuel pressure at all.
Update #7
Dropped the tank, re-inspected the hoses, replaced the two pumps and still nothing.
One thing that has be baffled is that I kept getting the code P0193 which is for the FRPS, I've replaced it twice now. And last night after tinkering with the car it started throwing the code again. I don't understand why though, that code is for when you blow the FRPS because of a spike in fuel pressure that pops the FRPS but I'm certainly not getting that.
What we did last night:
- Replaced the two pumps with OEM ones (nothing happened, still no fuel pressure at cranking)
- To test the pumps again we pulled the connector from the FPDM and powered pin 10 from the battery and grounded pin 3
- pumps ran, and we saw > 60psi of pressure in the rails
- with the pumps running (but the FPDM disconnected) we tried to crank the car but got nothing not even a cough or sputter (almost like there was zero spark)
I'm going back to the shop later today to do some data logging after the battery has been recharged (was pretty much dead after all this). Any advice on what to log? (I'm trying to log most fuel related PID's, guess I'll add spark).
Marc.
Related Mods:
Whipple 03-03 Cobra kit w/ 3.0 pulley
60# injectors
Diablosport MAF
PPRV Delete
Kenne Bell Boost-a-Pump @ 50%
Details:
- Everything is hooked back up
- I can hear the pumps prime when key in on position
- We see a small surge in pressure but drops off
- If we cycle on/off quickly we can get the fuel pressure to spike pretty high but then instantly drops
- no leaks
- when cranking there is no fuel pressure
- I do have a BAP and it seems to be ok
- fuses and relay seem fine
- Tried swapping FRPP just to be sure
Update:
- checked the relay by the FPDM and it's getting 12v
- getting code P0193, but not sure the FRPS is blown as there is no gas in the vacum line
- all fuses are fine
- vacuum lines all seem fine
- no leaks anywhere
- with pressure guage connected to the fuel rail, I'm seeing little to no pressure when priming (key in on position and I can hear the pumps prime), if I cycle on/off, on/off I can get the pressure to build but instantly drops to zero.
- when cranking there is zero fuel pressure
Current plan is to drop the fuel tank Monday and see what we can find there.
Update #2:
- Dropped tank
- All hoses are fine
- Pumps prime when car keyed on
- Pumps are NOT running when car is cranking
Update #3
- Confirmed we are getting 17v out of the FPDM (with BAP set to 50%) and 17v at the fuel hat connector.
So the only thing I can think of now is that the pumps are shot. But how do 2 pumps die after sitting for a year?
Update #4
- We powered pin 10 and grounded pin 3 on the unplugged FPDM connector, the pumps ran fine and held 60psi.
Update #5
- replaced the FPDM, still doesn't work (see latest thread post for more details)
Update #6
- Replaced the FRPS (again), the code is now cleared (no longer getting P0193), but still not getting fuel pressure at all.
Update #7
Dropped the tank, re-inspected the hoses, replaced the two pumps and still nothing.
One thing that has be baffled is that I kept getting the code P0193 which is for the FRPS, I've replaced it twice now. And last night after tinkering with the car it started throwing the code again. I don't understand why though, that code is for when you blow the FRPS because of a spike in fuel pressure that pops the FRPS but I'm certainly not getting that.
What we did last night:
- Replaced the two pumps with OEM ones (nothing happened, still no fuel pressure at cranking)
- To test the pumps again we pulled the connector from the FPDM and powered pin 10 from the battery and grounded pin 3
- pumps ran, and we saw > 60psi of pressure in the rails
- with the pumps running (but the FPDM disconnected) we tried to crank the car but got nothing not even a cough or sputter (almost like there was zero spark)
I'm going back to the shop later today to do some data logging after the battery has been recharged (was pretty much dead after all this). Any advice on what to log? (I'm trying to log most fuel related PID's, guess I'll add spark).
Marc.
Last edited:
