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Preston
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Posted: Tue Apr 27, 2010 12:52 pm |
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Joined: Tue Jun 24, 2008 7:25 pm Posts: 74 Location: Sun Prairie / Madison, WI
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So I asked SJ about this at the last meet in Milwaukee. Here is the problem: When I run my car for a bit then park it, it usually runs fine, when I start it again it will start running really shitty until I have driven around for a bit. When it starts up it sounds like it is missing. First thing that was suggested by SJ was replacing the fuel pump relay, right now I have one being ordered and it should be here tomorrow. However, I am having trouble locating where it goes or where the old one is. I checked here on Stealth316 http://www.stealth316.com/0-frames.htm (garage/Fuel Pump Relay/Resistor Bypass under step-by-step instructions) and tried to compare to my engine bay. Problem is I can't find it. So I took some pictures... Here is where I though it should be, but it isn't... The arrow is to something but I don't know what and it doesn't look like what I'm looking for.  Here is something I found and I'm not sure what it is, but it looks like something should be plugged into it    This looks like what I'm looking for but I want to make sure. Here is an shot of the area I am looking for, please let me know if you see what I am looking for or if you have any other ideas on what my overall issue may be.  Car is a 1994 VR-4
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G-ELL
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Posted: Tue Apr 27, 2010 5:36 pm |
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Joined: Wed Aug 13, 2003 1:18 am Posts: 3153 Location: Lehigh Valley, PA
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You're looking in the wrong spots. Remove your MAF. It's under there.
btw, bypassing the relay won't fix your problem. If anything, it'll probably make it worse.
Leaky throttle body seals, dirty throttle body, bad ISC or your fuel injectors (assuming they're still stock) not flowing within spec will cause that issue.
_________________ 06 Blue EVO 9

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Preston
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Posted: Tue Apr 27, 2010 7:23 pm |
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Joined: Tue Jun 24, 2008 7:25 pm Posts: 74 Location: Sun Prairie / Madison, WI
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G-ELL wrote: You're looking in the wrong spots. Remove your MAF. It's under there.
btw, bypassing the relay won't fix your problem. If anything, it'll probably make it worse.
Leaky throttle body seals, dirty throttle body, bad ISC or your fuel injectors (assuming they're still stock) not flowing within spec will cause that issue. Ok, I'll remove that tonight (sorry for the dumb question, but it is right in front of where I am looking, correct?). Wasn't looking to bypass it, I was just using that as a point of reference. Thanks for the extra advice.
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SJ
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Posted: Wed Apr 28, 2010 8:00 am |
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Joined: Sun Mar 06, 2005 9:48 pm Posts: 2973
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Hey Preston:
Under the MAS, bolted to the frame, mine was in a black rubber boot.
Typical looking relay.
I simply slide mine out of the existing mount and rubber boot and slide the new one in.
Changing this $6 part fixed my car with the symptoms you described.
However, as we talked and ol' hand tight has pointed out, your actual mileage may vary...
_________________ Racing is life. Everything else is just waiting. http://umg.mn3s.orghttp://ummo.boards.net
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G-ELL
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Posted: Wed Apr 28, 2010 11:13 am |
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Joined: Wed Aug 13, 2003 1:18 am Posts: 3153 Location: Lehigh Valley, PA
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SJ wrote: Changing this $6 part fixed my car with the symptoms you described.
However, as we talked and ol' hand tight has pointed out, your actual mileage may vary... I could see it causing this issue if the relay failed in the position where it's constantly bypassing fuel pump resistor.
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Preston
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Posted: Wed Apr 28, 2010 12:11 pm |
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Joined: Tue Jun 24, 2008 7:25 pm Posts: 74 Location: Sun Prairie / Madison, WI
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Ok so I found it and replaced it. May have helped a bit but it still did not solve my issue. Car is still running like crap.
I took a little spin in it after replacing the relay and I can drive it fine but if I get on it a little it will hesitate and feel like its not getting enough fuel then go like crazy.
I don't know if this would make a difference but it started doing all of this after running it for about 15 minutes at shawno lapping days. My dad was driving an didn't freaking realize that the bpv wasn't working and kept running it. Turns out the Y-pipe popped off a bit.
Also, one of the things my dad suggested was that running it hard like that through corners could have dislodged debris that may have been in the gas tank and might clog up the fuel filter. Would replacing the fuel filter/injectors/pump help my issue? I have a Walbro 255 ready to go in.
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SJ
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Posted: Wed Apr 28, 2010 1:25 pm |
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Joined: Sun Mar 06, 2005 9:48 pm Posts: 2973
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Preston
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Posted: Wed Apr 28, 2010 1:59 pm |
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Joined: Tue Jun 24, 2008 7:25 pm Posts: 74 Location: Sun Prairie / Madison, WI
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SJ wrote: When was the last time you did plugs and wires? I haven't since I had the car. that would be roughly 30k miles. Time to replace? Oh yea what is the plug gap supposed to be for these cars?
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SJ
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Posted: Wed Apr 28, 2010 3:58 pm |
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Joined: Sun Mar 06, 2005 9:48 pm Posts: 2973
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Preston wrote: SJ wrote: When was the last time you did plugs and wires? I haven't since I had the car. that would be roughly 30k miles. Time to replace? Oh yea what is the plug gap supposed to be for these cars? Oh, my bad, I would start there then. Depends on mods and boost, but I think most of us run 0.034-32.
_________________ Racing is life. Everything else is just waiting. http://umg.mn3s.orghttp://ummo.boards.net
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G-ELL
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Posted: Wed Apr 28, 2010 4:07 pm |
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Joined: Wed Aug 13, 2003 1:18 am Posts: 3153 Location: Lehigh Valley, PA
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Might as well run a compression test while you're doing the plugs/wires.
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Preston
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Posted: Wed Apr 28, 2010 4:23 pm |
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Joined: Tue Jun 24, 2008 7:25 pm Posts: 74 Location: Sun Prairie / Madison, WI
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G-ELL wrote: Might as well run a compression test while you're doing the plugs/wires. Alright I'll find someone with the stuff to do that.
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ttangel
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Posted: Fri Apr 30, 2010 11:21 am |
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Joined: Fri Jul 23, 2004 2:25 pm Posts: 2502 Location: Green Bay
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A compression tester is pretty cheap at any parts store... 15 bucks-ish.
Also, I cannot believe that no one told you to CHECK FOR BOOST LEAKS!
Build a pressure tester. Or buy one.
If your y-pipe blew off, from a faulty BOV (I assume you mean by-pass vavle with BPV, same part different term) the throttle body would have blocked the engine from ingesting huge amounts of extra air, and the basic problem with a faulty BOV is wrecking the turbos... so if the car makes healthy boost I don't think that your problem came from that... Also, I cannot believe the car stayed running with the Y-pipe blown off, even a bit. With draw-thru they usually fall on there face and die.
woot.
_________________ Bad decisions make good stories.
Look at it! LOOK AT MY @SS AND TELL ME IT'S PRETTY!
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Preston
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Posted: Fri Apr 30, 2010 11:40 am |
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Joined: Tue Jun 24, 2008 7:25 pm Posts: 74 Location: Sun Prairie / Madison, WI
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ttangel wrote: A compression tester is pretty cheap at any parts store... 15 bucks-ish.
Also, I cannot believe that no one told you to CHECK FOR BOOST LEAKS!
Build a pressure tester. Or buy one.
If your y-pipe blew off, from a faulty BOV (I assume you mean by-pass vavle with BPV, same part different term) the throttle body would have blocked the engine from ingesting huge amounts of extra air, and the basic problem with a faulty BOV is wrecking the turbos... so if the car makes healthy boost I don't think that your problem came from that... Also, I cannot believe the car stayed running with the Y-pipe blown off, even a bit. With draw-thru they usually fall on there face and die.
woot. Yea that was the other thing I was going to check for. One thing I really need to do is fix the bpv, ever since that the coupler hose from the bpv to the y-pipe keeps popping off. It's kind of a ghetto setup from the previous owner. I can keep it running if I stay on the gas a little but yea it will die just about every time it attempts to idle haha.
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Preston
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Posted: Sun May 23, 2010 11:39 pm |
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Joined: Tue Jun 24, 2008 7:25 pm Posts: 74 Location: Sun Prairie / Madison, WI
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Update on this, got back from the UMG today and started to plug away on the VR-4 (everyone made me so jealous). Got my plugs and wires from slimsunny (justin) and got them installed. After a bit of research I went with .036 for the gap on coppers. Cars runs MUCH smoother and is back to boosting over 5 psi. I found a little hose that was going to nothing and couldn't see anywhere near it that was missing anything so I just plugged it with a big screw in case it was a boost leak. One thing that popped up after install of plugs it my idle increased to about 1400 rpm. Is that ok? I think it might just be because of where I bolted the throttle cable (the bracket can be moved back and forth). Is that it or could my idle have been that shitty the whole time? Input appreciated 
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2004formula
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Posted: Sun May 23, 2010 11:55 pm |
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Joined: Wed Nov 21, 2007 10:08 pm Posts: 204
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meh, just move the bracket back a bit to lower it. actually, it might not be too bad; i never pay attention to start up idle vs. warm idle.
and next year, bring your damn car.
_________________ 
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