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#1 |
UYFBR
Join Date: Sep 2008
Location: Okanagan Valley - Canada, eh?!
Posts: 1,500
Vehicle: 1994 Hardbody
Thanks: 0
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(QUESTION for Admin: Should this be in Electrical, or Engine & Drivetrain? - It's an electrical problem, but it's related to Engine and Drivetrain. Please move (or cross post??) as you see fit.)
PROBLEM: Erratic idle, missfire, driveability issue, possible stalling. My truck would sometimes idle at 1500 rpm for no reason. It would also sometimes surge/buck/fart at low speed cruise. Sometimes a re-start would fix it. Sometimes a quick rev in neutral would fix it. It seemed to be returning more frequently, and getting worse. The Snap-On MODIS at work suggests ripping into the wiring harness, near the back of the valve cover near the firewall. It says there is a crimp connection in there that runs the injectors. The connection may ~look~ good, but cut it apart and resolder it. So I did. FIX: ![]() Remove the air filter.* This connection was previously "tweaked" by me with a couple zap straps.* That's the bundle I'm going into. ![]() Unsheath everything.* You will find two connections taped up.* I opened up both. ![]() There five white wires are crimped together near the top.* Below them, you can see some green wires crimped together. ![]() I cut the connection out, and wrapped the wires all together after sliding some heat-shrink tubing up and out of the way (not shown). ![]() Then soldered. ![]() Then heat-shrink tubing. ![]() The white wires are next - vice-grips holding the heat-shrink tubing out of the way. ![]() And heat-shrunk. ![]() And then re-wrapped. Here's what the wires actually do: ![]() RESULT: Smoother idle, no return of the weird cruise issues or 1500 rpm idle. Cold-start fast-idle works much happier.
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Last edited by SkinnyG; 03-14-2018 at 11:59 PM. |
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#2 |
ChrisXer92
Join Date: Dec 2012
Location: Atlanta, Georgia
Age: 25
Posts: 161
Vehicle: (RIP)1992 Nissan Hardbody & 1996 Nissan 240sx S14
Thanks: 12
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This is what I referred to in the pictures posted to this forum!
http://www.infamousnissan.com/forum/...ad.php?t=25108 ![]() |
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Thanked by: | 00whitexe (02-28-2013) |
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#3 |
UYFBR
Join Date: Sep 2008
Location: Okanagan Valley - Canada, eh?!
Posts: 1,500
Vehicle: 1994 Hardbody
Thanks: 0
Thanked 205 Times in 147 Posts
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OH SWEET MOTHER OF NISSAN!
THAT is super helpful! Makes TOTAL sense now, now that I know what the wires DO. AWESOME!
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#4 |
my pen is huge
Join Date: Nov 2012
Location: Edmonton, AB
Posts: 1,155
Vehicle: 1988 D21
Thanks: 18
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anything for Z24i? i checked at work and found nothing. ive got the same problem, it will buck bad once if i accelerate hard or when i cruise at around 2000rpm. so to accelerate, i have to short shift to make it not jerk. it only happens every 3 or 4 months for a week at a time which is odd
a couple of days ago it started happening again, and yesterday i gave every wiring harness connector in the engine bay a tap and went for a drive after and immediately the problem went away.
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ex
1992 Nissan Maxima GXE VG30E auto- retired at 429k 1988 Nissan D21 KingCab Z24i 5spd- retired at 248k current 1979 Toyota Supra 4ME 5spd 1981 Toyota Hilux longbox 22R 4x4 4spd 1991 Toyota Crown Royal Saloon 7MGE auto imported from Tokyo 2000 Chev Silverado 2500 6.0 4x4 |
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#5 |
UYFBR
Join Date: Sep 2008
Location: Okanagan Valley - Canada, eh?!
Posts: 1,500
Vehicle: 1994 Hardbody
Thanks: 0
Thanked 205 Times in 147 Posts
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In searching, I found the same sort of thing for the early Z24 - the harness issues were (in the forum I found) on the passenger side of the engine compartment, near the fuel filter sort of thing.
Linkie: http://forums.nicoclub.com/86-5-z24i...d-t491625.html Imagery (not mine): ![]() ![]()
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#6 |
my pen is huge
Join Date: Nov 2012
Location: Edmonton, AB
Posts: 1,155
Vehicle: 1988 D21
Thanks: 18
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thanks for the info, gonna check those harnesses tomorrow. i usually nudge some wires changing the oil filter in that area so that might be causing it
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ex
1992 Nissan Maxima GXE VG30E auto- retired at 429k 1988 Nissan D21 KingCab Z24i 5spd- retired at 248k current 1979 Toyota Supra 4ME 5spd 1981 Toyota Hilux longbox 22R 4x4 4spd 1991 Toyota Crown Royal Saloon 7MGE auto imported from Tokyo 2000 Chev Silverado 2500 6.0 4x4 |
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#7 |
UYFBR
Join Date: Sep 2008
Location: Okanagan Valley - Canada, eh?!
Posts: 1,500
Vehicle: 1994 Hardbody
Thanks: 0
Thanked 205 Times in 147 Posts
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Switched pictures to Photobucket for the time being.
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#8 |
Join Date: Nov 2010
Location: SanAntonio Tx
Age: 35
Posts: 1,483
Vehicle: 1993 D21 Reg. Cab
Thanks: 164
Thanked 150 Times in 139 Posts
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i just saw this bulletin from a link dvdswan posted the other day, basiclly the full img of what cbohannan posted
thanks for doing the real work and pics skinnyg i love this forum! ![]() ![]() ![]() ![]() |
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#9 |
Super Moderator
Join Date: Mar 2009
Location: Port Orchard, WA
Posts: 4,538
Vehicle: 96 HB
Thanks: 154
Thanked 597 Times in 527 Posts
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they also have answered it on http://www.nissanforums.com/hb-truck...ut-solved.html
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Thanked by: | 00whitexe (02-28-2013) |
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#10 |
ChrisXer92
Join Date: Dec 2012
Location: Atlanta, Georgia
Age: 25
Posts: 161
Vehicle: (RIP)1992 Nissan Hardbody & 1996 Nissan 240sx S14
Thanks: 12
Thanked 11 Times in 11 Posts
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If I could figure out how to post more I would! My shop's data software is a straight a-hole when it comes to sharing.
I can post any of the diagrams, but i cant get any words to save or even give me options related to saving... Anyway, glad you got some good info Skinny G. |
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