Tom,
This sounds exactly like a problem I had with my car about a month ago. I
thought it was fuel lines, pump, etc. What concerns me is that you say you
picked up a fuel filter at NAPA. Was it the one they list for our car? If
so, try a Nissan/Datsun one for our car or early Z. It took me forever to
figure out my problem because I put in the new Napa filter, etc. as well so
I figured filter couldn't be at issue. Car ran fine at idle or on flats.
Any type of hill or any real load casued car to stumble. I put in a Nissan
fuel filter and car runs just fine. Anyway, that filter was the problem
with mine. It may not be yor problem, but I do note that my fuel pump
couldn't fill up the NAPA filter but fills up the Datsun one just fine.
My amatuer advice.
Allen
1970 2000
Wenatchee, WA
>From: "Tom Hendricksen" <tom@fransfancies.com>
>Reply-To: "Tom Hendricksen" <tom@fransfancies.com>
>To: "Roadsters E-Mail List" <Datsun-roadsters@autox.team.net>
>Subject: Stumbling Problem
>Date: Tue, 10 Jun 2003 13:58:12 -0700
>
>Today while I was driving my 2000 it started missing in 4th and 5th gear on
>the freeway. As I continued to drive the miss became a stumble and started
>noticeably effecting lower gears as well.
>
>I figured it might be a fuel problem and stopped at NAPA and installed a
>new
>fuel filter. The car seemed to run better for a little while, but not
>long.
>
>Next I stopped for gas because the gauge was below 1/4 tank. That seemed
>to
>help for a few miles, and then the stumble began to return a little faster
>than before.
>
>I got the car home and let it sit for 45 minutes or so. It had seemed to
>run better after sitting before. Not this time. I knew before I was out
>of
>the driveway (150') in reverse that it would not run well. It seems to
>start and idle very nicely, but will not deliver power when needed.
>
>I think I know it is not the fuel filter, so that leaves the fuel pump and
>crud in the tank. Maybe the coil? I had the tank steam cleaned last year.
>The fuel line is original. There was a layer of mud in the bottom of the
>fuel filter I removed, so that was a good move. The fuel filter NAPA sold
>me is a metal inline, so I can't see inside of it. I will locate a correct
>filter soon.
>
>My question is about the stock fuel pump. Will it go away slowly like
>that,
>or does it just die. I don't remember loosing a fuel pump before, so I
>don't know what to expect. Is there a filter screen in the tank that is
>getting filled up with crud?
>
>Tom
>69 2000 "Mr.. Hyde"
>Portland, OR
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