2001 s60 !---Totally Stumped on Engine Misfire

Post by **volvolugnut** » 28 Jan 2026, 14:20

As financial firms are required to state: "past performance is not indicative of future results".
This time the situation may be different and your changes have not solved the problem.
Try some of the suggestions and tests given here.
volvolugnut

OliPhant · Post by **OliPhant** » 07 Mar 2026, 14:50

'07 V70 I had misfire turned out to be a combination of 1 bad injector and a coil failing intermittently. Replaced the injector and all coils - running good for now.

Post by **abscate** » 08 Mar 2026, 01:41

vtl wrote: 28 Jan 2026, 14:18
yabadabadoo1026 wrote: 28 Jan 2026, 14:15 im no certified mechanic but wouldnt seem to me that would entered into misfire???????--------and why would i check any cylinder other than the one the code is suggesting????? Thanks
When my #1 blew, I had misfires detected in two cylinders. Forgot which ones, but #1 was not among them.

You want all cylinders compression tested.

Yep. The misfire algorithm works well for a constant miss, but ot can misread the cylinder if it’s rough running or an occasional miss, in my experience

Post by **vtl** » 08 Mar 2026, 14:53

abscate wrote: 08 Mar 2026, 01:41 Yep. The misfire algorithm works well for a constant miss, but ot can misread the cylinder if it’s rough running or an occasional miss, in my experience

This was with 0 PSI in #1... Misfire counters were like #2 and #4. Contrary, a dying fuel injector in #3 that was missing the mark sporadically, but it was correctly diagnosed by ECU. Maybe with #1 it goes south because it is the first cylinder in firing order.