93 300zx misfiring - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

nate29 · 04-04-2010, 05:21 PM

Ok got a problem with my 300zx i put a new timing belt on and the hole 9 yards with it.Timing marks set perfect.but now that its all done its missfiring started up fine any ideas of what this could be.

daxnizmo · 04-27-2010, 07:25 AM

Have you checked your connectors on the injectors? Or maybe the PTU? I had the same issue and found the connectors had a lot of corrosion. Cleaned the up with a pick set and electric motor cleaner, then put some dielectric grease on after.

240sxxs · 07-29-2010, 03:06 AM

wat PTU ...

txq45 · 07-29-2010, 11:45 AM

Run codes .....?
Wiggle the wires on the PTU

Two-One-Six · 10-11-2010, 09:56 PM

It may be bad injectors...O-rings tend to go bad after awhile..Relatively easy fix. Z32's are notorious for having injector problems. I agree with daxnismo on the injector ends. I would check those first, and if any or some or bad it's not hard to install new connectors.

04-04-2010, 05:21 PM	#1
nate29 Join Date: Mar 2009 Location: VA Age: 31 Posts: 31 Trader Rating: (0) Feedback Score: 0 reviews	93 300zx misfiring Ok got a problem with my 300zx i put a new timing belt on and the hole 9 yards with it.Timing marks set perfect.but now that its all done its missfiring started up fine any ideas of what this could be.

07-29-2010, 03:06 AM	#3
240sxxs Zilvia Member Join Date: Aug 2008 Location: o were Posts: 277 Trader Rating: (0) Feedback Score: 0 reviews	wat PTU ... __________________ The pretty one Arn't free and the free one Arn't pretty

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04-27-2010, 07:25 AM	#2
daxnizmo Leaky Injector Join Date: Feb 2010 Location: west monroe, LA Age: 40 Posts: 99 Trader Rating: (0) Feedback Score: 0 reviews	Have you checked your connectors on the injectors? Or maybe the PTU? I had the same issue and found the connectors had a lot of corrosion. Cleaned the up with a pick set and electric motor cleaner, then put some dielectric grease on after.

07-29-2010, 11:45 AM	#4
txq45 Join Date: Feb 2010 Location: Plano TX Posts: 21 Trader Rating: (0) Feedback Score: 0 reviews	Run codes .....? Wiggle the wires on the PTU

10-11-2010, 09:56 PM	#5
Two-One-Six Join Date: Sep 2010 Location: Tampa, Fl Age: 39 Posts: 3 Trader Rating: (0) Feedback Score: 0 reviews	It may be bad injectors...O-rings tend to go bad after awhile..Relatively easy fix. Z32's are notorious for having injector problems. I agree with daxnismo on the injector ends. I would check those first, and if any or some or bad it's not hard to install new connectors.