86 300zc will idle but dies

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J D - 10 Jun 2005 02:53 GMT

I have an 86 300zx non turbo MT which had been running great. Parked it in
the garage, went to drive it about a week later and it was hard starting.
Got it to idle but as soon as I touch the gas it would die. If I pump the
gas pedal really fast, it will rev higher but it's rough. Cant drive it, any
load at all, even turning on the fan and it dies. Replaced the fuel filter
but didn't help.I checked the throttle position switch with an ohm meter and
it seems to be ok. Any ideas to try next? Thanks

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Steve T - 10 Jun 2005 06:35 GMT

> I have an 86 300zx non turbo MT which had been running great. Parked it in
> the garage, went to drive it about a week later and it was hard starting.
[quoted text clipped - 3 lines]
> filter but didn't help.I checked the throttle position switch with an ohm
> meter and it seems to be ok. Any ideas to try next?

Unplug the MAS and see if it reponds to throttle input. It won't rev past
2200 with it unplugged but might be a clue that the MAS is the problem if
it seems better with it unplugged.

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Steve

http://www.atlantaracing.com

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J D - 10 Jun 2005 20:51 GMT

Ok, I tried that and it did seem to be better and you are right, it wont rev
past 2000. I will have to get
a new MAS and see if that fixes it. Cant afford one right now but in the
next couple weeks I should be able
to.

Thanks

JD

> > I have an 86 300zx non turbo MT which had been running great. Parked it in
> > the garage, went to drive it about a week later and it was hard starting.
[quoted text clipped - 7 lines]
> 2200 with it unplugged but might be a clue that the MAS is the problem if
> it seems better with it unplugged.

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Steve T - 12 Jun 2005 00:29 GMT

> Ok, I tried that and it did seem to be better and you are right, it wont
> rev past 2000. I will have to get
> a new MAS and see if that fixes it.

It most likely will. Seems like at least 50% of the time this part is the
cause of running problems on those cars. Also check the AIV valve and use a
nissan air filter to avoid future problems.

http://www.autoforumz.com/Z-Cars-86-300x-problem-ftopict8642.html

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Steve

http://www.atlantaracing.com

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