Please help stat!! Pics inside!!!

ONLY for ADVANCED technical discussion about the 240sx!
ianae86
Posts: 60
Joined: Mon May 28, 2007 2:09 pm

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Alright, there are plenty of topics on firing order etc, etc, but I've read them all and my car still won't run right. Decided to change plugs/wires today and after one of the old wires snapped off in the plug hole I had to remove the valve cover to fish it out. Put it all back together and even though I was sure I did it right, the car just didn't want to run. It would sputter and idle at roughly 300 RPMs. So I took it all apart and can't figure it out. Here's what I've got. Then here are two diagrams. If you could match them up for me, I'll love you forever, haha. I have to work in the morning and need help. If I've got it right, then what else could it be. I only didn't change the fifth center wire because the new one wouldn't fit right but the old one did. Only unhooked the necessary tube on the air intake tube to remove the valve cover. Nothing else tampered with. Help please! Plus if we figure this out, these diagrams might help all the other noobs


ianae86
Posts: 60
Joined: Mon May 28, 2007 2:09 pm

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And can attempting to start your car with it in the wrong firing order cause any damage? I feel like i've tried it a million different ways now :crook:

VeloceDrift
Posts: 300
Joined: Thu Nov 02, 2006 12:52 pm
Car: 1993 Nissan 240SX S13 coupe
1995 Nissan KA24DET

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i just ran out and checked my car and that is right.. it could be a hundred things. could be bad coil, bad coil wire (center one), MAF not pluged in, Bad MAF. i would make sure that everything is plugged in all the way the MAF and the plugs that go to the coil would be what i would check first

ianae86
Posts: 60
Joined: Mon May 28, 2007 2:09 pm

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Thanks, I'll re-set it to how it is in the picture and check those things. It ran fine before I decided (like a jackass) to change stuff around ,haha. Thanks for the reply. I'll get back with you asap.

VeloceDrift
Posts: 300
Joined: Thu Nov 02, 2006 12:52 pm
Car: 1993 Nissan 240SX S13 coupe
1995 Nissan KA24DET

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also are you sure that your plugs are gapped right and torqued to spec

ianae86
Posts: 60
Joined: Mon May 28, 2007 2:09 pm

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VeloceDrift wrote:also are you sure that your plugs are gapped right and torqued to spec
Alright, it was an electrical connection. There is a plug right around the intake manifold that slides onto a metal clip. It apparently lost connection when I was disconnecting hoses to get the valve cover off. Seems to be alright now. Plus I always buy pre-gapped plugs and I don't have a torque wrench so I just have to go by feeling It still has funky idle drops when i come to a stop but as soon as I figure a way to get to it, I'm gonna clean the throttle body Thanks again for your help/support. And since my last thread never saw any action, do you have any clue what a metallic grinding when I turn left might be? Stock car except for a 3" exhaust the guy before me put on it. I just have no idea where to start looking. Thanks again! :

VeloceDrift
Posts: 300
Joined: Thu Nov 02, 2006 12:52 pm
Car: 1993 Nissan 240SX S13 coupe
1995 Nissan KA24DET

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lol yeah these nissan engines are really picky.. does the idel rise and fall when you are stopped?? if it does then your intake piping might be loose somewhere and causing a leak and your MAF to read funny, i also had that problem once. as for the grinding i would probably check the tow hook in the rear by the exhaust. every 240 i have owned with aftermarket exhaust always hits that so i cut mine off. that would be where to look first.

captainclutchkick
Posts: 96
Joined: Wed May 24, 2006 11:43 am
Car: 1990 nissan 240sx coupe with rb25det

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you might want to put the bolt back into your distributer mount so your timing doesnt get f'd.

ianae86
Posts: 60
Joined: Mon May 28, 2007 2:09 pm

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captainclutchkick wrote:you might want to put the bolt back into your distributer mount so your timing doesnt get f'd.
Haha, thats actually how I bought the car. I'm not sure where the bolt it, and I actually think the guy advanced it a little bit before I got it. All in due time I'll get it fixed. Thanks for pointing that out though, hadn't even noticed.
VeloceDrift wrote:lol yeah these nissan engines are really picky.. does the idel rise and fall when you are stopped?? if it does then your intake piping might be loose somewhere and causing a leak and your MAF to read funny, i also had that problem once. as for the grinding i would probably check the tow hook in the rear by the exhaust. every 240 i have owned with aftermarket exhaust always hits that so i cut mine off. that would be where to look first.
Thanks man, I'll check those things out today. The intake piping all looks good though. I was trying to get it all unhooked to clean the throttle body but it was dark and I really didn't feel like unhooking a bunch of stuff to get to it. I might try to not if I have time. I'll be sure to post my findings. Thanks a ton guys!

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rn240sx
Posts: 891
Joined: Mon Jan 05, 2004 6:15 pm
Car: 12 Frontier V6 (supercharged)
98 240sx ka-t (fully built)
09 Ninja 650R
06 Suzuki S40
15 Hyundai Santa-Fe 2.0T
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looks like ur plug wires are not in the right order..A should be 1D should be 3C should be 4B should be 2

Correct me if im wrong here...

ianae86
Posts: 60
Joined: Mon May 28, 2007 2:09 pm

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rn240sx wrote:looks like ur plug wires are not in the right order..A should be 1D should be 3C should be 4B should be 2

Correct me if im wrong here...
Actually they wound up being right. I figured out that when I had to remove the valve cover to fish out the wire end, I knocked a connection loose. Specifically this one I believe: Not sure what this connection does but without it, the car ran like crap. I think this might be the one Sport Compact Car's S13 buyer's guide said sometimes caused rough idle and could be fixed by establishing an extra ground(?) I don't really understand that but I'm pretty sure its the same thing.

vancouverbc
Posts: 3197
Joined: Thu Oct 30, 2003 1:30 am
Car: 1991 240sx

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that looks like the tps connection. look up throttle postion sensor in tutorials in my signature. extra ground just means wire between metal part of component and engine chasis. ground is just the connection between negative battery terminal and metal parts of car. many components are grounded simply by being in contact with engine chasis. the interface can become oxidized and not be a good contact.

ianae86
Posts: 60
Joined: Mon May 28, 2007 2:09 pm

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Thanks man! You guys have been super helpful. This site doesn't get as much traffic as Honda-Tech did, but there's definitely not as much hate and more of car brotherhood here. Thanks again!


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