Colin was onsite for his 2015 visit this week. We spent the first part of the day fine tuning and troubleshooting why this bus was running so poorly. The fuel in the tank was stale and we found the fuel filter was jammed with crud. Unfortunately a tune-up, fresh fuel, and a new filter did not eliminate the symptoms. I was getting a little worried that it was going to be a very late night. That is until Colin picked up the Temp Sensor II wire connector during a vacuum test and instantly noticed an improvement. I had a spare sensor in my collection of parts so we installed it and then readjusted the AFM.
I was prepared for some type of disappointment however it never occurred. During our first test drive the bus ran better than it has in years! It’s not like we haven’t looked at the Temp Sensor II before. Colin even tested it himself this year and confirmed it was within spec. I also tested it several times in 2012. It was the first time I’ve ever tested a component so I made this post looking for some advice:
After Colin’s visit this year and replacing the Temp Sensor II, I completed a 100 mile test drive and it was smooth driving the entire time. I should say that I’ve only been able to drive my bus 20 miles in 2 years. I barely made it around the block and back to the garage the last time I tried it in November 2013. After 100 miles I’m very optimistic that replacing the Temp Sensor II has resolved the problem.
It’s hard to believe that I’ve been chasing this gremlin for almost 7 years. I was starting to accept the possibility that my bus would always choke and stall on the road. I’m going to nominate Randy in Maine for an award because he was the first to call out the sensor as a possible culprit in his reply to my original 2008 post. I’ll also nominate Colin for his help this year to confirm. I'm so glad to be back on the road again. My bus and I thank you!!!
Here's the full list of our work on 6/9/2015:
- Valve adjustment
- Cleaned valve covers
- Replaced points
- Adjusted timing
- Drained old fuel
- Replaced fuel filter
- Checked fuel pressure
- Adjusted AFM
- Checked vacuum
- Replaced Temp Sensor II
- Fixed horn
- Replaced hub cap
- Resolve heavy oil leak (main seal?)