Fuel pouring out of Intake, Power FC Failure!!!
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Fuel pouring out of Intake, Power FC Failure!!!
Hello,
I just recently purchased a 93 FD not running with a new rebuild that had never been started. The person I bought it from said it had a fuel leak and that he couldn't figure out where it was coming from.
I get the car home and go ahead and try to start it. The car runs for about 6 seconds then dies. I decide to locate and fix the fuel leak before I start it again just for safety reasons. I jumper the fuel pump on and start looking for leaks. I had the intercooler off at the time and I smelled a HORRIBLE gas smell, but I didn't see anything leaking! All the sudden gas started POURING OUT OF THE UPPER INTAKE!!! It turns out it was a damaged o ring on a secondary injector. Once that was fixed, the car ran great.
I had just completed a full non sequential conversion and was planning to install a
Power FC once I got the car in good running condition.
Since it was running great, last night I installed the PFC exactly per the diagrams on the forum. I turned the key on, and the screen on the PFC never displayed anything. I thought that was odd, so I went ahead and tried to crank it. It sounded hydrolocked as the starter was having a hell of a time turning the motor over.
I took off the intercooler and it was FULL OF GAS AGAIN.
What the hell!
To sum it up:
Car was running perfect.
Installed the power fc, screen never displayed with the ignition on.
Tried to crank it but engine was full of fuel again.
Why would the power fc turn on the fuel pump and open the injectors?
Screwed Power FC? If so, to run with just the stock ECU would I have to reconnect the wires I cut for the PFC?
I previously owned an LT1 FC and wanted to get back into the rotary game. This isn't a good way to treat an ex V8 guy. I'd hate to put an ls1 in it... :p
Thanks,
Brando
I just recently purchased a 93 FD not running with a new rebuild that had never been started. The person I bought it from said it had a fuel leak and that he couldn't figure out where it was coming from.
I get the car home and go ahead and try to start it. The car runs for about 6 seconds then dies. I decide to locate and fix the fuel leak before I start it again just for safety reasons. I jumper the fuel pump on and start looking for leaks. I had the intercooler off at the time and I smelled a HORRIBLE gas smell, but I didn't see anything leaking! All the sudden gas started POURING OUT OF THE UPPER INTAKE!!! It turns out it was a damaged o ring on a secondary injector. Once that was fixed, the car ran great.
I had just completed a full non sequential conversion and was planning to install a
Power FC once I got the car in good running condition.
Since it was running great, last night I installed the PFC exactly per the diagrams on the forum. I turned the key on, and the screen on the PFC never displayed anything. I thought that was odd, so I went ahead and tried to crank it. It sounded hydrolocked as the starter was having a hell of a time turning the motor over.
I took off the intercooler and it was FULL OF GAS AGAIN.
What the hell!
To sum it up:
Car was running perfect.
Installed the power fc, screen never displayed with the ignition on.
Tried to crank it but engine was full of fuel again.
Why would the power fc turn on the fuel pump and open the injectors?
Screwed Power FC? If so, to run with just the stock ECU would I have to reconnect the wires I cut for the PFC?
I previously owned an LT1 FC and wanted to get back into the rotary game. This isn't a good way to treat an ex V8 guy. I'd hate to put an ls1 in it... :p
Thanks,
Brando
#2
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Originally Posted by brando
I previously owned an LT1 FC and wanted to get back into the rotary game. This isn't a good way to treat an ex V8 guy.
I have no clue what your issue could be...if it worked without the PFC, I'd start there.
#3
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Sounds like you shorted your power fc. Take it apart and look for a burnt section on the printed board. The short may be keeping one or more of the injectors stuck open.
Unfortunately powerfc's only come with a 30-day warranty so you're sol as far as that's concerned. The stock ecu for a while until you get a replacement would work, the powerfc may be repairable if you can find someone local who can repair that burnt segment.
Unfortunately powerfc's only come with a 30-day warranty so you're sol as far as that's concerned. The stock ecu for a while until you get a replacement would work, the powerfc may be repairable if you can find someone local who can repair that burnt segment.
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I figured it was probably a toasted PFC.
Soooo.... the question is, do I have to re solder the wires I cut to install the PFC if I were to reinstall the stock ecu? It was just emissions crap, right?
I'm not concerned about the check engine light being on, I'm just worried about the stock ECU going into limp mode.
I'm planning on buying the resistors for the solinoids I removed tonight since I got rid of the 33 feet of bastard vacuum lines....and now I have to put the frekin stock ECU back in.... grrrrr
Thanks,
Brando
Soooo.... the question is, do I have to re solder the wires I cut to install the PFC if I were to reinstall the stock ecu? It was just emissions crap, right?
I'm not concerned about the check engine light being on, I'm just worried about the stock ECU going into limp mode.
I'm planning on buying the resistors for the solinoids I removed tonight since I got rid of the 33 feet of bastard vacuum lines....and now I have to put the frekin stock ECU back in.... grrrrr
Thanks,
Brando
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Thanks the responses!
The only question I have left is if I have to reconnect the wires I cut to install the PFC in order to reconnect my stock ecu, and if I don't reconnect the wires, will it go into limp mode.
Thanks!
Brando
The only question I have left is if I have to reconnect the wires I cut to install the PFC in order to reconnect my stock ecu, and if I don't reconnect the wires, will it go into limp mode.
Thanks!
Brando
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why did it short out? if you dont figure that out, why isnt it going to fry the stock ecu too?
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Originally Posted by j9fd3s
why did it short out? if you dont figure that out, why isnt it going to fry the stock ecu too?
I think the PFC was shorted out before I installed it. The car was running PERFECT when I removed the stock ecu and installed the PFC.
Here is the wiring diagram I used to install it:
https://www.rx7club.com/attachment.p...d=179938&stc=1
The question of the day is:
The only question I have left is if I have to reconnect the wires I cut to install the PFC in order to reconnect my stock ecu, and if I don't reconnect the wires, will it go into limp mode.
Thanks,
Brando
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Originally Posted by reza
you will just get check engine light when connecting back the stock ECU. Not going to prevent your car from running properly.
Reza
Reza
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On the Diagram it shows a pinout 4C and a 3M, those are for the Knock sensor(white wire) and I believe the black wire is for your injectors. Those shouldn't be cut. Maybe this is where your problem is. I would re-splice those two connections and see if your PFC comes on. If it does then there was your problem. You then will probably have to clean your plugs and crank over the engine to relieve it of the excess fuel before you try to start it again.
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I'm gonna throw a big thanks to the ******** that made that diagram.
Thanks to everyone else to noticing this error for me!!!
I'll let you know what happens tonight after I reconnect the wires..
Thanks!
Brando
Thanks to everyone else to noticing this error for me!!!
I'll let you know what happens tonight after I reconnect the wires..
Thanks!
Brando
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