HELP, must have car running by monday [Archive] - SR20 Forum

: HELP, must have car running by monday


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highspeed
05-16-2009, 04:41 PM
First off please excuse my english, I'm typing from my blackberry.

So yesterday I'm driving outside if atlanta and noticed that my car was kinda jerking, and getting worse, then it started blowing dark smoke(not black). So I pull over into walmarts parking lot. I start looking at everytrhing and notice that that my fuel pressure gauge is reading 0 right after I shut the car off. So I turn the key on, and I hear what sounds like someone peeing in a bucket, I knew something was wrong. I then take all the spark plugs out, crank it, and gas just shoots out of #3 cylinder, every stroke. So I am pretty sure that the injector is stck open. I go down to advance and pick up a reman. Inj, I put it in and just start cranking, thens starts running fine.I drive it home lastnite and again this morning. Then it starts all over again this afternoon! I pull the injector plug, and notice that the two wires on the harness.for that plug, were showing copper right next to each other. I tried putting electric tape around tham, but nothing worked. Has anyone had this problem? Thanks

200SXDRIVER
05-16-2009, 05:46 PM
You sure you didn't tear the o-ring on the injector when you put it in? The rubbed wires are unusual unless they were touching something or you have a rodent problem.

highspeed
05-16-2009, 09:13 PM
No, ill be honest, I think its the wires for the injectors. I don't know of any thing else it could be, unless some one convinces me otherwise

swiss
05-16-2009, 09:23 PM
Unplug that injector so it isn't getting an electrical signal, then see if it still gushes.

highspeed
05-16-2009, 10:20 PM
I tried that and it still seems to be gushing

swiss
05-16-2009, 10:38 PM
Well, it isn't the wiring. Sounds like the orings as 200sx suggested above.

You can unbolt the fuel rail (watch out for the plastic spacers) and put it on a towel, then turn the key on (don't start the car). The fuel pump will prime, and if orings are the issue, fuel will leak out.

misfitdruid
05-17-2009, 06:45 AM
Yep , like 200sxdriver and swiss said , it sounds more like an Injector O-ring or Injector problem , not the wiring . Insulating the exposed wires on the injector harness was a good Idea though , could have caused intermittent or unwanted injector spray .

Taurus45acp
05-17-2009, 06:56 AM
its the 0-rings dude, a notoriously horrible flaw in nearly every older Nissan (even though they wont admit it). My 240 did the same thing a few years back, replaced the injector O-rings and it ran just fine afterwards.

highspeed
05-17-2009, 08:46 AM
Here is the issue. The new injector has new rings on it! So I was sure it was something else, but I will check it out again, see the new injector and o-ring worked fine for about a day, but now its right back to what it was doing.

highspeed
05-17-2009, 01:22 PM
I bought a new set of o-rings, what is the big ring that is flat and hard? I wish I could load a pic of it. I bought the beck arnley oring replacements.

swiss
05-17-2009, 01:31 PM
You can unbolt the fuel rail (watch out for the plastic spacers) and put it on a towel, then turn the key on (don't start the car). The fuel pump will prime, and if orings are the issue, fuel will leak out.

Do that^^^

highspeed
05-17-2009, 03:00 PM
Lol......my bad, I will. Thanks for the info

highspeed
05-17-2009, 05:30 PM
Swiss you were right, thanks

Taurus45acp
05-17-2009, 05:38 PM
this is the 3rd "Bad O-ring" thread this week, im gonna go check mine again :D

swiss
05-17-2009, 05:42 PM
Good, that's an easy fix. They may have gotten stuck in a bad position when you were installing them. Make sure you use some petroleum jelly when you install the next set.

highspeed
05-17-2009, 05:54 PM
I got another problem, I still have no fuel pressure at Key on, ignition off. The pump primes, then shuts off, when this happens the fuel pressure drops off rapidly to zero, I have no more leaks, but I wonder if the fpr is stuck open or something, anyone have a thought on this one?

highspeed
05-17-2009, 05:56 PM
Oh and at idle my wideband never gets above 13.05 and is still smoking!

highspeed
05-17-2009, 06:00 PM
Ok I tapped on the fpr and I think it is sticking. Fuel pressure with pump on is 3.0 kg/cm2, and would immediately fall to 0, now it falls to 2.0 and is slowly falling, is this right?

swiss
05-17-2009, 06:12 PM
Sounds like that could be a fpr problem (especially if you tapped on it and it improved). Stock fuel pressure is 3bar with the vacuum line capped, so it seems like you have healthy pressure. It shouldn't drop to zero immediately though.

highspeed
05-17-2009, 06:16 PM
Ok, I tapped on it again and it held up to 3 after the pump stopped, now afr are in the 14's at idle and no mre smoke, I'm going to get a adjustable fpr soon so that I know what's going on, anyone have a stock one that I can use as a back up? Lol