Car started:Not 100% though

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vangj
Posts: 157
Joined: Fri Feb 21, 2003 8:11 pm
Car: Cars, Sports

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I bouth an ignitor chip and put everything back together and my car finally started again. The only problem is that it doesn't idle correctly and my air/fuel ratio gauge (I think it's hooked up correctly) starts out at the middle then makes it's way to the right (I think that's rich I forget?) and stays there, and I could smell gas. When the car first starts, it idles at about 1500 rpm fine, but once it gets hot and I push on the gas a couple times, it doesn't idle correctly and the motor gets shaky. Any suggestions on what might be wrong. I think my battery is messed up because it was getting really hot and smoking up, can the battery cuase this? Maybe spark plugs? Maybe timing?

What is the black box on the right of the valve cover used for? I have a breather there and when I push on the gas, smoke comes out from there. Is that supposed to happen? It seems like it would because it connects down to the manifold.Any suggestions would help.


240_Keyy
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Car: '90 240 Fastback
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sounds like a MAFS problem

unfrgivn
Posts: 264
Joined: Tue Jul 01, 2003 7:21 am

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Black box is an oil catch can and the breather you have is where oil overspill is pushed out of the valve cover and normally back into the intake. It's is equivalent to the hose that comes of the front left side of the KA24DE valve cover. When you step on the gas, it will spew more oil, hence the smoke.

vangj
Posts: 157
Joined: Fri Feb 21, 2003 8:11 pm
Car: Cars, Sports

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Okay, so it should have smoke then. That sounds good. I will check the mafs somehow also to see if that's the problem. Any other suggestions?

BuudWeizErr
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Joined: Tue Sep 24, 2002 11:35 am

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Check the IC piping, may be a leak.

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Movingviolation240
Posts: 1681
Joined: Thu Apr 25, 2002 2:26 pm
Car: '95 Nissan 240SX 400hp SR20DET -SOLD
'93 Lexus SC300 w/ SP66 turbo kit

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dose your AF just show one light or a whole bunch of them jumping around. It sounds like that might be the issue. Try disconnecting the O2 sensor from the harness (grey 3 pin plug in the engine bay near the catch can) If it runs better you screwed up your AF install, I've seen that happen before (of the gauge or one of it's wires gets grounded out and screws up the signal). I'm not sure if this would be it but it could be.

Paul

vangj
Posts: 157
Joined: Fri Feb 21, 2003 8:11 pm
Car: Cars, Sports

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I will try unplugging my O2 sensor to see what happens and I think all of my intercooler pipes are okay.

If I turn up the little screw on the Throttle body up almost all the way and turn the box screw under the manifold up almost all the way, it revs high and it doesn't seem to want to die as much, but the car would be idling high. I can still smell gas though.

I have an oil leek from the front plat where the underdrive pulley is, that wouldn't cause this problem would it? Right now, I'm thining it's either my timing is off, MAFs problem, or fuel pump problem. Any ideas? What is the best way to check my timing?

AznRide
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Joined: Sun Nov 03, 2002 5:36 pm
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Hey vang, are you the guy that's on miacracing.com hosted by seth? Anyways, welcome here. I can smell the sr20 fuel when driving, but i had it dynoed on wideband O2 and I was running a little bit lean. With the help of my SAFCII, it's fine now, but I can still smell the gas...Check yoru sparkplugs. I wish I would be home modding my car. But i'm going to Italy due to deployment of my unit, I will be back next year. If I were you, try to get someone else's mafs and test it out. If it's bad, might as well upgrade it to Z32 and send your ECU to retune with the Z32 mafs. Your A/F gauge most likely not to be correct. Go to the back and smell your exhaust while the car is running...rich or lean, you should be able to smell it in a couple of sniffs. Again, check your intercooler connections.

About yoru oil catch stuff, just take them out. You dont' need it. Put a breather in the other end of the valve cover, and the other end should but connected to the small hose running from the back of the engine (towards the firewall). I wish I could help you since you live in MN. Other than that, keep trying or talk to Ron at Propulshun at midway (pascal and university). He has good understanding about it since he helped me doing my SR. I hope that helps...I also hope your injecter(s) are not stuck open...

vangj
Posts: 157
Joined: Fri Feb 21, 2003 8:11 pm
Car: Cars, Sports

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No, I'm not on miacracing.com. That must be someone else. I will check my sparkplugs and O2 sensor. I might have to get another maf's to try also. My exhaust smells like gas. It didn't smell like that before my car got messed up. Not that I can remember atleast. I will probably leave the oil catch stuff the way it is, unless it's better to remove it??

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RobDET
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my money is on the o2 sensor or the injector O rings. Don't take the injectors out w/o replacing the O rings

vangj
Posts: 157
Joined: Fri Feb 21, 2003 8:11 pm
Car: Cars, Sports

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I've tried unplugging the MAFS while car is on and it didn't seem to make a difference, but I'll check it again to make sure. If I just unplugged th o2 sensor, and if it's the problem, will it rev correctly afterwards? I will have to check the O rings also on the injectors. Which O rings should I get for the SR?

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RobDET
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Joined: Wed May 07, 2003 5:51 pm
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Not sure whitch ones to get... i'm working on that in anohter post right now... as for the O2... my experence was that it ran beautifully w/o the O2 plugged in but crappy with it in.

Also becuase it just happened to me i'm gonna say it again. BE sure to replace the O rigns if you take the injectos out. It's no fun if you don't The motor will fill with gas REALLY fast

vangj
Posts: 157
Joined: Fri Feb 21, 2003 8:11 pm
Car: Cars, Sports

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I unplugged my o2 sensor and it seemed to idle like how it used to. Not 100%, but it idles alot better. It idles at about 1,200 rpm and when you rev it up and let go, it drops pretty low (seems like it's going to die), but it catches itself most of the time. It doesn't idle up and down like I mentioned on my first posting. Does this mean my o2 sensor is bad??? What can I do to fix this?

If I leave this unplugged, then I can't use my air/fuel ratio gauge. Maybe I have it hooked up wrong and that's why it's causing this?? I have a autometer air/fuel ratio gauge. Anyone know which color goes to which?

Question about the vacumm hoses... Does the bigger inlet on top of the TB connect to the BOV? Does the smaller one on top of the TB connect to the Fuel Regulator? Does it matter which one it connects to?


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