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Old 07-08-2014, 06:18 PM   #1
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Default Sputtering issue??

I let my truck sit over the weekend and fixed an exhaust leak. Went to test drive to see how it sounded and when I hit 3rd gear and pressed the gas the truck started sputtering and acting strange at highway speed. As if it was starving of fuel. Went back home and parked it and it idled just fine and would rev with no problem while in neutral. So I decided to go ahead and change the fuel filter. The next day I drove it to work and back home and it ran fine. No sputtering at all. Today on my way to work it does it again at highway speed in 5th. Sputtering and stalling. It would run fine if I just barely let out of the gas and also acted weird on the way home today. So my question is could this be a sign that my fuel pump is going out? If so is there a way I can test it? What are some other issues it could be? Please help. It's a 93 hardbody 2.4 5 speed
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Old 07-08-2014, 07:45 PM   #2
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My first guess would be ignition related like a ground somewhere. There is a little tab on the distributer and I knocked that loose once and it caused my truck to run crappy. That is a pretty tough issue to diagnose though.
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Old 07-08-2014, 07:53 PM   #3
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was it back firing when it was sputtering?
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Old 07-08-2014, 11:51 PM   #4
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No it was not backfiring.it was just shaking and kind of stalling. And when I let out of the gas it would act normal.it idles just fine. And while in neutral I can rev it just fine. But sometime it will act like this while driving. Not always though.
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Old 07-09-2014, 01:24 AM   #5
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Are you getting a check engine light? Also when is the last time you did a tune up? It could be so many different things,so your going to have to narrow it down. If the plugs,wires,cap,rotor are old than that's where to start.
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Old 07-09-2014, 02:08 AM   #6
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No I'm not getting check engine light! And I've been meaning to do a tune up on it just trying to find the extra funds. It has 167000 on it.
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Old 08-04-2014, 01:48 AM   #7
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clean and check your MAF sensor voltages... ecm cant properly ground the injectors to get a stoichiometric air fuel ratio... might be running to rich or lean depending on which way the sensors skewed....

may be a defective fuel pressure regulator....

clogged fuel filter....

leaky injectors....

worn cap, rotors, cap, and wires....

stuck open egr valve...

or the notorious bad crimp in the harness near the firewall that affects the grounds to the fuel injectors...
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Old 08-04-2014, 02:19 AM   #8
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jdowney......read this thread http://www.infamousnissan.com/forum/...ad.php?t=25332
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Old 08-04-2014, 02:30 AM   #9
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When you rev it in neutral, are you reving it past 3 grand? If it sputters around 2.5 to 3 grand I would definitely check the MAF sensor. Not sure about the '93s, but my '96 did something similar, some days it would run fine, others it couldn't get out of it's own way... Come to find out, inside the MAF sensor the wires were split, sometime they would connect so the truck would run normally, other times the wires would separate and make the truck run like crap...
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Old 08-04-2014, 04:11 AM   #10
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Yeah make sure there's good tension on the connector at the Maf... Wiggle it whilst idling...
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