car wont stay idling after new pump and turbo
Sep 26, 2013, 01:14 AM
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car wont stay idling after new pump and turbo
Hey everyone, I just finished installing my 25g turbo and 400lph fuel pump. I ordered the STM re-wire kit for the pump, but was hoping to be able to drive it to and from work before the wiring kit gets here. I started it today and it ran fine for 30 minutes or so, then started dying and cutting out (even when pressing on the gas pedal). I am currently at work and can't go look at the car, but I believe the pump has failed due to e85? I have checked couplers and vacuum, and fuses. Any help and advice is appreciated.
*Here is what I know:*
* It starts right up, but will not stay alive
* When the MAF was disconnected, it idled rough, but did NOT die
* Even if rolling down a hill and attempt to put it in gear to keep it alive and "push start" it, will not keep it alive.
*My short term solution:
Put in the stock (or last pump I had) in for now
*Here is what I know:*
* It starts right up, but will not stay alive
* When the MAF was disconnected, it idled rough, but did NOT die
* Even if rolling down a hill and attempt to put it in gear to keep it alive and "push start" it, will not keep it alive.
*My short term solution:
Put in the stock (or last pump I had) in for now
Last edited by b00stah0lic; Sep 26, 2013 at 05:14 AM.
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Sep 27, 2013, 09:30 AM
#8
The Wally 400 (part number ending in 262) is not E85 compatible and does have a tendency to die EXTREMELY quickly in high ethanol content.
The Wally 400, a.k.a. 450 or 467 or 475 or whatever else people call it, (PN ending in 267) is designed for E85, is smaller than the 400, yet puts out more volume.
Both of these pumps have a tendency to overwhelm stock returns and cause fuel pressure to spike up to 53+psi or more at idle causing a rather "crappy idle" but will run just fine off idle when the fuel consumption goes up enough that base fuel pressure will be regulated at the standard 43psi.
Since you had no fuel in your return, either your regulator was stuck shut from the excess pressure (which doesn't seem very likely) or your pump was just plain shot from the Ethanol.
If you're going to be on a DD setup and don't want to experience these issues, either run a larger return line (-6AN) so the regulator can return the amount of fuel it's required to, or get a double pumper like the Buschur unit.
If you have any further questions or need to get a replacement pump, return line, or a double pumper setup of your choice (there are at least 3 that I know of), give us a call or PM and we'll get you sorted out.
The Wally 400, a.k.a. 450 or 467 or 475 or whatever else people call it, (PN ending in 267) is designed for E85, is smaller than the 400, yet puts out more volume.
Both of these pumps have a tendency to overwhelm stock returns and cause fuel pressure to spike up to 53+psi or more at idle causing a rather "crappy idle" but will run just fine off idle when the fuel consumption goes up enough that base fuel pressure will be regulated at the standard 43psi.
Since you had no fuel in your return, either your regulator was stuck shut from the excess pressure (which doesn't seem very likely) or your pump was just plain shot from the Ethanol.
If you're going to be on a DD setup and don't want to experience these issues, either run a larger return line (-6AN) so the regulator can return the amount of fuel it's required to, or get a double pumper like the Buschur unit.
If you have any further questions or need to get a replacement pump, return line, or a double pumper setup of your choice (there are at least 3 that I know of), give us a call or PM and we'll get you sorted out.
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