I had what appeared to be a dead number 1 cylinder. Tried swapping coil packs but it made no difference. Let me back up a bit and just say I did a plenum pull originally because of a substantial valve cover oil leak. Prior to the pull, the car ran fine, but after getting it back together, it would only run on 3-4 cyls. I finally ohmed out the injectors and found only two in spec. One (#1) was completely open and the other three were in the 140-180 ohm range....so, I bit the bullet and replaced the injectors. After reassembly, it fired right up and except for a high idle issue, it ran great. I restarted the car 3-4 times and on the last try, nothing. It didn't even try to fire on ANY cyl. After chasing ghosts, going through an ECU diagnosis, checking #1 coil pack for spark (good, BTW), nothing worked. Out of desperation, I took the drivers side kick panel back off to see if the fuel pump relay had somehow become disconnected. All this time I sensed that I could smell gas fumes, so for the last try, I left the pump relay disconnected, and low and behold, the car fired right up. Instead of letting the car die from lack of fuel, I shut it off, reconnected the pump relay, and wouldn't know, it wouldn't fire at all just like before. SO, disconnect the pump relay once again, and it fired right up, only this time I got the relay reconnected before the engine died of fuel starvation. It has started every time since (over a dozen start attempts) and I took it out for a road test and it ran perfect except for that still high idle issue. My question is could the fuel press. regulator be going bad, allowing TOO much press. to the injectors, causing flooding problems?
And, how about that idle issue. I did the recommended idle adjustment, but it's still too high....any ideas?
Thanks, Steve
Seems to be Excessive Fuel Pressure?
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evildky
- Posts: 14225
- Joined: Sat Jan 31, 2004 9:23 pm
- Car: 71 Datsun 240ZT
87 Nissan 300ZX N/A-T
06 Nissan 350Z GT
Toyota Tundra TRD RW - Location: Louisville, KY
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Re: Seems to be Excessive Fuel Pressure?
Sounds like maybe you hooked up the fpr backwards causing the pressure to build, the higher the pressure the higher the volume of fuel that comes through during the injector open time. also possible you buggered an o ring when you did the injectors causing one or more cylinders to flood with fuel.
Re: Seems to be Excessive Fuel Pressure?
Thanks for your thoughts but because of the orientation of the FPR, I don't think I could have hooked it up backwards and as far as installing the injectors, I was very careful to lube the O-rings and they all slid into the sockets of the fuel rails with no excess resistance, just finger pressure was all that was needed to seat them.
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evildky
- Posts: 14225
- Joined: Sat Jan 31, 2004 9:23 pm
- Car: 71 Datsun 240ZT
87 Nissan 300ZX N/A-T
06 Nissan 350Z GT
Toyota Tundra TRD RW - Location: Louisville, KY
- Contact:
Re: Seems to be Excessive Fuel Pressure?
The 2 soft lines that come from the drivers fender to the cross rail are very easy to hook up backwards.
Re: Seems to be Excessive Fuel Pressure?
[quote=" Out of desperation, I took the drivers side kick panel back off to see if the fuel pump relay had somehow become disconnected. All this time I sensed that I could smell gas fumes, so for the last try, I left the pump relay disconnected, and low and behold, the car fired right up. Instead of letting the car die from lack of fuel, I shut it off, reconnected the pump relay, and wouldn't know, it wouldn't fire at all just like before. SO, disconnect the pump relay once again, and it fired right up, only this time I got the relay reconnected before the engine died of fuel starvation. It has started every time since (over a dozen start attempts) and I took it out for a road test and it ran perfect except for that still high idle issue. My question is could the fuel press. regulator be going bad, allowing TOO much press. to the injectors, causing flooding problems?"
I really need some expert advice, please. For the third time, I've gotten the car to run just fine, fires up every time.....until I button up the fuel pump relay and reinstall the kick panel. Each time I do this, it floods out (I say this because I can smell gas fumes almost immediately, and the car won't fire on even one cylinder let alone six). I remove the kick panel (again), unscrew the relay mount screws, disconnect the relay plug, and damn if it doesn't fire right up. If I reconnect the relay plug before it quits, I don't have any problem with it restarting EVERY TIME. Do I need to run around with the kick panel off and the relay just laying there on the floor board?? REALLY frustrated here????
BTW, I know my fuel lines are connected properly because I took some before pix before even attempting to tear down the intake plenum and I used those pix to reassemble everything......
Thanx in advance, Steve
I really need some expert advice, please. For the third time, I've gotten the car to run just fine, fires up every time.....until I button up the fuel pump relay and reinstall the kick panel. Each time I do this, it floods out (I say this because I can smell gas fumes almost immediately, and the car won't fire on even one cylinder let alone six). I remove the kick panel (again), unscrew the relay mount screws, disconnect the relay plug, and damn if it doesn't fire right up. If I reconnect the relay plug before it quits, I don't have any problem with it restarting EVERY TIME. Do I need to run around with the kick panel off and the relay just laying there on the floor board?? REALLY frustrated here????
BTW, I know my fuel lines are connected properly because I took some before pix before even attempting to tear down the intake plenum and I used those pix to reassemble everything......Thanx in advance, Steve