Need some help again here folks. Car now at 416,000kms and doing alright for being 20yrs old with the exception being the following.
This happens only when its colder and rainy
Symptom Summary:
- Runs fine for about 20min of driving but I begin to notice that additional throttle does nothing. Flooring it on the other hand will provide acceleration, but very little. Idles somewhat ok at this point.
- Within minutes it will start to stutter if I try to maintain speed. Will run smooth if I floor it, but now even less acceleration. Now idles very rough will occasionally, and you can smell it running rich.
- Minutes after that, flooring it barely has any impact other than keeping it running. Will restart, but have to floor it.
EVERYTIME this happens, if I shut the car off for 3-5min, it will start up great and run fine again until the cycle repeats.
What I've ruled out during an episode:
- Choke plate is wide open
- Hot Air door is wide open
- No part of the ignition system appears to have gotten wet
What I've replaced:
- Fuel Filters, both
- Fuel Pump
- Various other bits
I know the distributor is headed out anyway since I do have the jumping tach needle from time to time, BUT, its done that for at least a year now on rare occasions and still runs fine unless it happens to be cold and rainy.
Feedback is much appreciated as usual.
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