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I have a 98 V70/ NA /163k miles that stalls about once per 1 week when at idle. When it stalls, it just slowly dies, no backfiring or stumbling. On one occasion, it was difficult start after sitting about 3 hours after a normal shut down. All other times it has stalled while at idle.
This has been going on for about 5 months. When stalling occurs, the engine just slowly dies, the check engine light comes on, as does the winter drive mode arrow, but no codes are set. It takes 1 ~2 mins. to restart, then runs fine.
It has been pretty well maintained (I’m orig. owner and repair guy with help from brickboard). At 140k, all timing, fluid, wires, dist. components were changed. PCV (crank ventilation) is regularly maintained, as are vacuum hoses. The fuel filter was changed at ~110k (assuming clogged filter would show up at higher speeds?). It has the original MAF and TPS, both of which I’ve measured as best I can with no obvious problems found. Trans fluid is changed regularly and has never indicated a problem. ABS module was rebuilt by Victor at about 90k.
The problem had not occurred for about 10 days while weather was hot and dry. Then it stalled again this morning after sitting out in cool rain overnight and being driven for about 15 minutes in slow traffic. Anyway, I hate shot-gunning car repairs and thought someone might have a suggestion. My next step is to replace the fuel filter and add fuel treatment.
Thanks for any ideas,
kcarl
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