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Fine . Rough running /stalling after 1/4 mile . Fine 200

posted by  someone claiming to be TJ Traver on  Sun Jul 14 08:54 CST 2013 [RELATED]

Has anyone encountered this problem ? Looking for ideas ...
1993 Volvo 240 , which 99.9% of the time runs flawlessly .
But sometimes after sitting on damp / humid days ... after starting just fine , after 1/4 mile when I come to my first stop and start to accelerate , it stumbles badly , to the point of stalling . It restarts hard and runs raggy , but if I put it into low gear and nurse it from the start up to road speed , it clears up then runs 100% again , with no further issues.

It does not log error messages . I've replaced the cap / wires / plugs / coil but the problem persists.

It seems to occur at the cold --> warm transition . Is there a thermal switch that may be going wonky ? Or what else ?

Appreciate any ideas or diagnostic questions .

Thanks, Todd






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