Re: 1986 Nissan D21 Hardbody Sunrader - intermittent Cold NO START - Fuel Feeding Problem?
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I saw Julia recently and had a chance to check her rv out. I have checked codes and found a 24 and a 31 which resolve to 25 = throttle valve switch (tps) and 31=? ECM. I found a very loose ECM case ground wire, which had noticable electrolysis corrosion. That suggested that at some points there was power flowing via this bad connection. I also found A new TPS sensor at the throttle valve. So looks like old codes were not cleared and the tps sensor was replaced. The ECM code is most likely the new code. The empirical data is that 1. she was getting firing when using starter fluid, 2. She was not starting when both cold ( most common) and when hot., 3. This is only a starting problem, 4. Very intermittent, and lastly,? 5. it runs perfectly with good condition ignition components...when it starts.
I repaired the bad ecm ground.?
The data suggests that it is a fuel problem. Because this is a centralized injector, most likely issue is a ecm failure to call for injection. Also possible is a wiring or other fault in fuel system. Because we had a ground fault in ecm case and knowing the inconsistencies of body grounds on old, rusting, and consistantly shaken vehicles, I concluded at this point that it is 30% probability that the loose ecm ground was the issue...and called it done. Until the next episode, if there is one, proves otherwise ?. The occurance inconsistencies make it unlikely to be common issues.
Julia, I hope it keeps starting well for you. But let us know when the next no start occurs
No that's the filter location on a 720. Hers is a D21. Don't think a clogged filter has anything to do with it or it would start with starter fluid. Most likely a sensor and a bad sensor will throw a code. Have the codes checked please
Linda S
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