Alright Zilvia, in desperate need of some knowledge.

[240sxowner]

Ok so to make a long story short. I need my car to run, it is now my dd, it did run just yesterday but died on me at a stop light (kinda sputtered then died) wouldnt start back up. left if over night, still wouldnt start in the morning, tried push starting it but would catch for a sec then die. when key starting it just cranks. what could be wrong? I need this thing up and running asap. Thanks in advance.

[nismo 240sx]

check your spark plugs cables dizzy..fuel filter FUEL PUMP!...now go have some fun..lol gl

[240sxowner]

and and btw, its a stock blacktop SR

[240sxowner]

thanks, I was thinkin maybe fuel pump as well.

[240sxowner]

when ignition key is in on position my fpr should be around 42 right?

[Swifty]

Yes try checking the fuel pump

[240sxowner]

Ok when ignition is in on position i have no fuel pressure, but how can i check to see if its not the pump, but maybe the relay.

[copmagnet]

check the fuel pump wire at the pump for 12v with key on. Yes? Pump sucks. No? Check the fuses and relay.

And I know personally I keep about 15 spare relays of all types for Nissans on hand, so its an easy check to just swap a good one and and see if it works.

[Goldeneye9mm]

lol yeah check the fuel fump after you make sure there IS indeed fuel in the tank. put a gallon in it and try to start it. if no start have someone pound on the fuel tank with the palm of their hand HARD while you're trying to start it. if it didn't stard before and it starts then it's a fuel pump. good luck.

[krappy]

had similar problem, turned out to be the ignition switch

[240sxowner]

will an oem fuel pump work for the sr?

[c-los13]

before somebody says this.........................
GET A WALBRO AND FORGET ABOUT THE FUEL PUMP FOR A WHILE!!!!

[cotbu]

How mechanically inclined are you, will you be able to perform all the test required to find and repair the issue? If not and you try to tackle this you could end up spending moneys on random parts, that you should have but may not need just yet!

Ok It does sound like fuel, but it is a lot to the fuel system for one to say it's just the pump. check the line make sure they are correct, disconnect the rail feed line, place it in a bottle to test flow and maybe debris. If you've gotten this far you should know if the fuel pump relay and ecu are working correctly. put the feed line back disconnect the return line and place it in the bottle, there should be little or no flow. if you have full flow you may have a faulty fpr. Put the return line back. get some vise grips and place them on the return line, you don't need to full clamp down, but you could. turn the ignition to on pause a sec then turn to start. what happens doe the car start and run? if it runs remove the vice grips. I kinda got caught up in the fpr thing, but you get the point. testing and diagnosing could cost or shouldn't cost any money. They're more thing to check like injectors and whatnot so get to testing. comeback with you findings.

[240sxowner]

I took off a Walbro gss 341 and ordered an OE replacement (Airtex E8235) through a parts shop cuz i needed one fast, got the replacement this morning, only problem is, its a whole lot bigger and it doesnt have the quick disconnect for the terminals. I just need to know if it will still work lol.

[240sxowner]

Alright, here is what ive found. The fuel pump isnt getting any volts, so i checked the fuse and the replaced the relay. still isnt getting volts. so am i looking at a wiring problem? maybe the ignition switch? ECU? I checked with 20 DC current with a digi multimeter.

[cotbu]

s13 or s14? sr,ka,rb or ls?
I can get you started if it's s13...?

[240sxowner]

s13 sr20det blacktop

[cotbu]

remove egi pump relay, looking into the relay socket jump pins 2 and 4
[1] [2]
[3][4]

Turn the key to on, if the pump primes it's the relay trigger from the ecu or the ecu that is bad.
The pump will run till you turn the key to off so this is a temp fix but you could run your car like this, but the trigger is also used for the iacv i think.
http://i18.photobucket.com/albums/b142/COTBU/jumpedsocket.jpg

Do not send 12v down pin 1 ever. even by accident.
for pin 1 test continuity to the ecu pin 104 should have constant tone, no breaking up.
I think that would tell you that you need to either have the ecu repaired, replaced or do a temp fix such as triggering the relay via a switch or jumper the pins or whatever till the ecu is repaired or replaced

[240sxowner]

alright thanks, imma try this real quick, if it doesnt work then im gonna call it a day and fuck with when its not 95 degrees out.

[cotbu]

ok, but post your findings

[240sxowner]

jumped the relay, still claimed i had no volts, and the pump didnt kick on when connected.

[cotbu]

key on? check the voltage on pins 2 and 4 of relay socket should be 12v or battery voltage.
doesn't seem like the pump is the issue.

[KiLLeR2001]

You put the jumper wire on [3] and [4]. When you turn the key to ON position it should trigger the pump.

[Goldeneye9mm]

lol yeah check the fuel fump after you make sure there IS indeed fuel in the tank. put a gallon in it and try to start it. if no start have someone pound on the fuel tank with the palm of their hand HARD while you're trying to start it. if it didn't stard before and it starts then it's a fuel pump. good luck.
if you jumped the relay and still got no volts try this. if the brushes of the fuel pump motor are not making contact you will get no voltage. i've been a mechanic a long time. takes 2 ppl and 20 seconds. low post count does not mean you should dismiss me. geez

[240sxowner]

Sorry man, wasnt dismissing you, just had plenty of fuel in the tank, and since the pump isnt even getting initial voltage from the quick disconnect im kinda figuring it isnt the pump

Also, is it pin 3 and 4 or 2 and 4?

And one more thing

for pin 1 test continuity to the ecu pin 104 should have constant tone, no breaking up.
I think that would tell you that you need to either have the ecu repaired, replaced or do a temp fix such as triggering the relay via a switch or jumper the pins or whatever till the ecu is repaired or replaced[/QUOTE]

how do i go about testing the continuity?

[cotbu]

If you use my diagram, lol. The pins 2 and 4 are tied together so it doesn't matter.
2 or 4 to pin 3

how do i go about testing the continuity?
Multimeter or test light a multimeter would give you a tone, and you could test if it is grounding out on the chassis. The test light may not be accurate and you would have to disconnect the ecu, if you use power on that line.

You could make a self powered unit with like a AA battery.

[240sxowner]

Ok so i tested pin 2 and 4 and no voltage, I tested pins 3 and 4 and got close to 12v but it only happened once, tried testing it again and got no reading. Also tried jumping 3 to 4 but to no avail. still havnt ever got any volts back to the pump.

[240sxowner]

Also, I have not tested continuity to pin 1, reason being is that my fuse box is near the front of my engine bay and the ecu is on the passenger side floor board, thus the meter will not stretch that far.

[cotbu]

You have wiring problems, but to eliminate the fuel pump, let's run a jumper wire from the battery to pin 3, of the fuelpump relay socket ur pump should run. Or you could check all the harness plugs and grounds, make sure they're good:-)

Sent from my highly tuned vibrant!

[FaLKoN240]

Could be a fried ECU.

[240sxowner]

battery is relocated in the rear, is it possible to just run 2 wires from the battery directly to the pump, then just add a switch?

[SoCalDrifter]

this happened to my RB rip your fuel pump out and make sure everything is still wired good if youve replaced it or still good to just check anyways then put it back in try to start it up if that doesnt work its your MAF make sure the plug is plugged it snug and rap a zip tie around it to make sure it is then make sure your MAF and air filter and connected to the silicon hose that runs to your motor... those were my problems with my RB and SR

[240sxowner]

the ground wire on the fuel pump housing is disconnected, but with all the testing that doesnt seem like it would be the problem would it?

[240sxowner]

so i got the car running by hooking the quick disconnect through a switch to the battery, will this be ok for a temp fix, or could it be damaging?