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Nissan truck dies unexpectedly
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bigrickjames
New User
Jun 29, 2009, 10:55 AM
Post #1 of 2
(1546 views)
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Nissan truck dies unexpectedly
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I have a 1983 4-wheel drive Nissan Pick-up truck, 2.8 engine that stops running on me without warning. I have taken it to six different mechanics over the last two years ... none seem to be able to diagnose the problem (though they have no problem charging me for their services).
I have replaced the fuel pump twice, the fuel filter twice, the coils (it has two), and have had a new carburetor installed. I have also "blown" the fuel lines with compressed air, both sides of the fuel pump. I replaced one broken fuse under the dash, and reconnected the braided ground to the engine.
I believe the problem is electrical. I think I have an intermittent open circuit to the fuel pump. (I can't feel or hear it pumping when it acts up. )My gas gauge doesn't work, my temperature gauge doesn't work.
The truck seems most apt to die when (1) in the afternoons, when the air temperature is up; (2) when I fill the tank with gas; and (3) when I'm driving up an incline.
Usually, after about five minutes of sitting, the truck re-starts, but it usually stops again after several more minutes of driving.
None of the mechanics I've consulted has figured it out ... can you?
Thanks.
(This post was edited by bigrickjames on Jun 29, 2009, 11:02 AM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 29, 2009, 11:21 AM
Post #2 of 2
(1541 views)
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Re: Nissan truck dies unexpectedly
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The problem isn't that they can't figure it out, the problem is they can't duplicate the problem. If the problem isn't present, then there is no defect to find at that time. I'm afraid no one is going to be able to tell you what is wrong without being able to troubleshoot it during the failure.
Anything else is just throwing parts at it and that's not the way we repair things.
Here is the normal troubleshooting procedure
Every engine requires spark, fuel and compression to run. That's what we have to look for.
These are the basics that need to be tested and will give us the info required to isolate a cause.
1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.
2) Test for injecter pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injecter with the key on.
3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.
Once you have determined which of these functions has dropped out,
you will know which system is having the problem.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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