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R34 Gtt Wont Idle

Ry_R34GTT
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Ry_R34GTT Apprentice

Ry_R34GTT

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Hey so i have googled and searched through the forums quite a bit and would still like a second opinion. For a while my 34 was having coil pack issues, one cylinder not firing occasionally and sounding like a truck/loss of power. The other day i was driving as per normal and all of a sudden under throttle i was losing all power and felt like MASSIVE drag so i pulled over. At this point it was idling fine and would rev through the rev range perfectly but once in first gear id take off normally and after about 2 meters it would have a huge power loss and drag. I managed to get the car home 2 meters at a time as i didn't want to leave it on the street (really bad area) and then had to reverse up my drive way as it was the only way i could get it up there ( too much power loss in first but not in reverse). I let it sit for a bit and now when i start it it starts perfectly and then dies straight out. If i giver it some throttle it is fine but is spitting out black soot and will stall once it hits idle.

After hours of research i came up with the either AFM was not working, vacuum leak or faulty idle switch. So i pulled it apart the AFM and re soldered it and still no good. My question remains is the AFM faulty or is the idle switch faulty? any ideas? :D

Kinda losing my mind haha

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SE skyline Rookie

SE skyline

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So were 5 wet?

Was it running than you removed them so they could have gotten wet. Plugs that work will not be wet because they burn the fuel. If it was running rough than you pulled plugs than they could have a chance to get fuel on them on the cylinders that are not firing.

SE skyline Rookie

SE skyline

Posted
Posted

I had one stuffed coil pack and it made my car miss fire intermittently. One spark plug looked a little different in the fouling. Because it was only sometimes it had not changed the plugs appearance a lot. I changed all coil packs as my car has done 185000km and I just bought it so I don't know when they were last changed. Either they have done a great amount of KMs or they have been changed once before as they normally last about 100000km.

Ry_R34GTT Apprentice

Ry_R34GTT

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sorry for the late reply i have been away. All the other plugs looked perfectly fine as i replaced them maybe 4 months ago or so but one was black and dry none were wet. Just before i went away i found a rather big split in one of the main intake hoses and i have just replaced that but the battery is dead so i have to wait for it to charge to see if it changed anything. :)

Ry_R34GTT Apprentice

Ry_R34GTT

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So i started her up and she started fine and went to die. Gave a little bit of throttle and she settled on idle so i let her warm up for a bit. Revs through the rev range beautifully but now at idle she sounds like shes missing occasionally so i disconnected each coil pack one by one and it sounded worse every time so the coil packs arent the problem. This problem is unrelated btw it was doing this for a week or so before she died.

Ry_R34GTT Apprentice

Ry_R34GTT

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Went for a drive and she is pulling harder than she ever has been and my boost gauge was only hitting 7 psi instead of 10? Then i popped a hose that i must not have tightened properly but i lovely lady with a 200 sx came running out of her house with tools so could get it home haha

Ry_R34GTT Apprentice

Ry_R34GTT

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I know im just a little slow haha :)

I believe all my problems have gone away now after i fixed the boost leak and cleaned the IAC Valve. No weird idle and car has alot more power but kinda feels like it pulls back slightly once it hits boost. Thanks for the advice tho Hadouken was very helpful :)

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