blufke

I have a 93 cx and i have the 255lph walbro pump in my car and within the time ive owned it,m about 3 weeks, its done this twice. Ill be coming to a stop and the car will die, and then when i try to start it, it will crank over and over(studder until fuel is used up) and then only crank. during these times when i put the key to the ON position i dont hear the pump priming.

If i try to start it while giving it gas, that will get it to go and then i will hear the pump. i dont know what is wrong. I do not want it to do that sort of thing(lose pressure,stop pumping), while im boosting, which i will be doing soon.

any thoughts?

blufke

anyone?

b16ahybrid

Is it the high pressure fuel pump?

blufke

im not sure, would that make a difference? im checking to find out(was in the car when i bought it), but im going to assume for now that it is not.

wickedxboi

did you check the connections? make sure its all plugged up nice and snug.

racer4200

My car does the same thing when I I have around 1/4 tank of gas. It pisses me off. I have the same fuel pump. I've been dealing with it for years so i am kinda used to it.

Tom

tony1

Check the PGM FI main relay. They have a tendency to go bad intermittently and cause the fuel pump to shut off. You can temporarily bypass it by jumping the blk/yel wire to the yel/grn wire at the relay. This will give 12v to the pump whenever the ignition is on rather than relying on the input from the ecu to prime and run the pump. I've bypassed it quite a few times and never had a problem running it that way.

blufke

is that relay under the hood in the black fuse box(by battery)?

tony1

No, it's under the drivers side of the dash. I think it's an 8 wire plug if i remember right...

nsxmatt

Yeah, I have had that problem before on almost every EF and EG i've owned. I guess it's a Honda defect but the main relay does tend to act up. Mine would only do it when it's been running for a while. Also I think the walbro will not pick up fuel if you run low unlike the stock fuel pump.

Jason kiDD

If you need a main relay I have on available..

But if I were you I would check the pump itself. Sometimes you get a bad one..

sporkcrx

While we are on this subject, I have a walbro too.....but I'm just curious why the wires in the fuel tank would never spark? I mean, what if one got loose and started touching the post...wouldn't that cause a spark in the gas tank???

Bseries

all these guys with 1/4 tank probelms are most likely getting the wrong fuel pump. I know there are some on here who are selling those pumps for cheap but i think they are giving the wrong kit. I ran into this before and I had the company i bought it from correct it. the install kit is incorrect.

JRSCCivic98

Because gasoline is not a conductor of electricity. I've had a Bosch pump in my tank with the wires posts exposed and it didn't conduct or blow.

jmm96gsr

iTrader: (1)

do the install kits have different part numbers? can you list them so everyone knows if their getting the right install kit with the fuel pump.

sporkcrx

but what about the fumes? can't there be a spark and ignite the fumes?

blufke

its the high pressure pump.

blufke

anyone else have this problem? bringing it back from the dead because it does it once in a while. ill start driving and feel it studder, so i step on the gas to try and keep my speed/revs up and it will fight its way through it(2-3 secs) and then work fine again. worst time it did it was when i was in line to race at our local drags and i was only 3-4 cars back when it quit on me and didnt want to start for quite a while. and it wasnt that low of a tank because i put in about 2 gallons right before racing and it probably had about 1.5-2 in it at that point. any ideas?

oh, and it does sound cool when priming(nice and loud).

raene

That's not a fuel pump problem... that's a problem with the tune. I actually have the same problem except the car's never died on me.

blufke

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by raene &raquo;</TD></TR><TR><TD CLASS="quote">That's not a fuel pump problem... that's a problem with the tune. I actually have the same problem except the car's never died on me. </TD></TR></TABLE>

with the tune? its a totally stock rom on the ecu. im not boosted yet(still waiting on the drop shop)

oh, and now this wonderful adventure too:
https://honda-tech.com/zerothread?id=604289

raene

I'm on a stock ECU too. I mean that there's a problem with a sensor going out or being maladjusted. For me, I'm pretty sure it's the TPS needing to be set correctly but I'm lacking a multimeter that can read 0.45V accurately so I haven't done it yet.

Cyphear

I'm also having the same problem. I'm using the high pressure, but not running high pressure, is there anything wrong with that? It only seems to happen until the car gets warm. My car seems to idle 100rpm higher now too (850RPM), maybe it learned it needs a little more to keep from dying... maybe.

tegmech

It is alright if you dont run high pressure on that pump. However, the higher rpm is caused by a bump up in fuel pressure from the stock one. Only a couple psi. If you want to put it back to the stock pressure then get a fpr. I even bet that Chad would install it for you if you ask. I can get you his phone # if you want. He does awesome work on integras!