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I have a 1985 Nissan 720 kingcab 4*4 and it has hesitation excelerating a lot when cold but after its warmed up does OK. The engine bogs uphill bad. I have changed the fuel pumps replaced all 3 belts and oil/tranny fluid changed. It had been sitting 2 years before I got it I've ran 6tanks of gas trough it so far with carberator injector cleaner through it. But its still boggin out what should I check next

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  • Nissan Master
  • 3,519 Answers

Hi Melissa:
It never hurts to change the spark plugs. When cylinder pressures increase under load, the plugs could be misfiring.

Posted on Mar 28, 2015

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6ya6ya
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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Misfire

One question, have you replaced the ECTS (Electronic Cooling Temperature Sensor)? These cause no end of different seemingly unrelated problems on Saturns. Peice is about ten bucks and is an easy install. Just search on youtube for a how-to video. Even if that's not the problem it is reccommended to replace this peice just the same as they ALL end up going bad at some point.

If that's not a fix, start pulling plugs. Check to see if they're correctly gapped and if they have any damage/corrosion. If you're running Platinum plugs, immediatly change to a copper plug as Platinums have no place in these motors. Most people have the best luck with NGK copper.

Check to make sure that your plug wires haven't been crossed. This sounds like a plug or wire issue most likely so it has to be in that family, if the plugs are good, wires good and not crossed, sensors are fine, then time to replace your coil packs. If you've replaced everything up to the coil packs then that is most likely the cause of your dillema.


Posted on Oct 25, 2008

  • 1861 Answers

SOURCE: 99 tacoma

Still need the codes.
Injectors can go "bad" in a couple of different ways; all they are is an electromagneticaly controlled nozzle. When the ECU "fires" the injector, it pulses a ground circuit for 4-8 milliseconds, the electromagnet powers up, the valve at the bottom of the injector opens, and the fuel shoots out, under pressure. The wire can be bad/chafed/corodded/ The electromagnet may be weak. The nozzle may be stuck. Lots of things. But, to put in an injector for a number 4 cylinder misfire (p-0304 code) would be one of the last things that I would do.

Posted on Nov 21, 2008

pippall
  • 1486 Answers

SOURCE: 1987 chevy S10 engine idle problem

relace the throtle air idle valve.The temp switch will allso cause this problem.

Posted on Jul 19, 2009

honeymokey
  • 3113 Answers

SOURCE: 2004 Isuzu Rodeo 3.5ltr 4X4 hesitation/misfire acceleration

The upper intake gaskets may be leaking. They are made of plastic and metal and will leak air. Do not remove the cover on very top of manifold when changing.

Posted on Jul 24, 2009

roniecon
  • 6826 Answers

SOURCE: 2003 kia # 3 misfire/ runs rough

Replace the coil for number 3 cylinder.

Posted on Nov 11, 2009

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My 1985 Nissan truck turns on and drives for about 1 hour then it dies, I have to wait another day then it will drive again, what can be wrong


How many miles do you have on her,I also have a 85 Nissan 720 4x4.hAD HER FOR 22 YEARS,IN MINT CONDITION,

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Not picking up gas when engine is cold, sputtering, bogging out especially when travelling uphill, Is this some sort of a sensor maybe??,the spark plugs are new. thanks


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Serious timing issues on 1985 nissan king cab z24.


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Apr 18, 2017 | 1985 Nissan King Cab

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Engine bogs down


Whatever your problem is, I would guess that it happened after you began to drive it. I would consider looking for a vacumn leak. Plus, it would be helpful to know how the carb change affected the problem, as it does seem like fuel.

There are inline fuel filters under neather the truck body that may cause a problem, as well.

But I still feel that based on the limited amount of information, I would look for a vacumn leak. For example, if it has power brakes, a leaking hydrobooster can leak vacumn and throw of your air/fuel ratio. Vacumn pressure at idle should be 14.2, and at a higher idle should drop to about 12 or 11 inches of vacumn.
Bill

Nov 13, 2008 | 1985 Nissan King Cab

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