1998 S90 hesitates at low RPM

Ethan Rode · Post by **Ethan Rode** » 07 Jun 2014, 12:43

Check this out for the ignition harness:
http://www.davebarton.com/volvoharnesses-960.html

bloodrootfc · Post by **bloodrootfc** » 10 Jun 2014, 09:03

So here is the latest update: I went to the Midas again because they have done so much for my car (brakes/struts/some sensors to chase the above problem) that they do a lot for me for free. I told them to smoke test the gas tank (which no one had done before - amazing) on suspicion that my intermittent problem was related to fuel vapor buildup that should have been returned to the tank from the canister but there was insufficient vacuum. Sure enough there was a leak over the gas tank. They used the access panel in the floor of the trunk to diagnose that a four inch length of vent valve hose was leaking. Replaced the hose and will update again after a few days of driving if the problem is solved, but so far so good after ~20 miles.

bloodrootfc · Post by **bloodrootfc** » 10 Jun 2014, 09:14

Photo of the leaking hose attached:

93Regina · Post by **93Regina** » 10 Jun 2014, 21:56

bloodrootfc wrote:The codes are P0455 and P0172.

P0172 Solutions

P0455 Evaporative Emission Control System Leak Detected

bloodrootfc · Post by **bloodrootfc** » 16 Jun 2014, 10:13

SOLVED! After a couple hundred miles and a dozen drive cycles, still no codes. No stumbling. It was a vacuum leak on the gas tank end of business.

1998 S90 hesitates at low RPM

Re: 1998 S90 hesitates at low RPM