We drove our coach 255 miles, about five hours of driving, from Cummins Coach Care in Coburg, Oregon to our home base near Shelton, Washington.

Here’s a map showing our route, heading north:

An interactive map, with potential stops pinned:

Our coach parked at Cummins:

Helpful tip:

Preparing to leave:

Heading to I-5 North:

Roadworks:

Exit to I-205:

Entering Washington:

Closed rest area:

Bump:

Fuel stop:

Soon after the fuel stop, about three hours (200 miles) after leaving Cummins, the Check Engine and Malfunction Indicator lights came back on, with the same SPN 102 FMI 18 fault:

At that point, we decided to just continue home. The exit to Shelton:

City limits of Shelton:

Welcome to Shelton:

The SPN 102 FMI 18 fault code on the dash:

Back to Cummins after the weekend!

Jenn drove our coach just 13 miles, about 20 minutes of driving, with me following in our truck, from Oregon Motorcoach Center in Eugene to Cummins Coach Care in Coburg, Oregon.

Since OMC didn’t have any luck figuring out the check engine fault issue, and I noticed that Oregon’s only Cummins Coach Care facility was just across town, we decided to take our coach there. Cummins is the manufacturer of the engine (and generator), and they have better diagnostic tools. If they couldn’t solve it, nobody could.

An interactive map:

Following the coach:

Arriving at Cummins:

A tech reading the codes from the diagnostic port in the engine bay:

They couldn’t investigate the issue(s) for a few days, so once again we left the coach and headed home. Fortunately, they have electrical hookups available:

Our site:

The place was practically deserted at the time, with no other RVs parked outside (there may have been some inside their shop, though).

We drove our coach just 47 miles, about an hour of driving, from Blue Ox RV Park in Albany to Oregon Motorcoach Center in Eugene, Oregon. Yes, again.

Here’s a map showing our route, heading south:

An interactive map:

The evening before, we had an issue with the electrical pedestal; one of the 50 amp legs dropped to just 42 volts, which is potentially damaging to a coach. Fortunately my Power Watchdog caught it, but not before the heat from low voltage and high amperage partially melted the plug:

I switched to the neighboring site’s pedestal, since that site was empty. In the morning, I notified the RV park, so they could fix the pedestal.

Leaving Blue Ox, again:

Arriving at Oregon Motorcoach Center… again:

This time we spent the day in their customer lounge while they investigated the things they broke:

One of the issues was the entry step, which was always retracting when the entry door was closed, even with the step switch off (and key off), which is supposed to keep it out. Something it didn’t do until they worked on the coach. They didn’t find the cause of that, but found a workaround, moving an entry step wire in the front electrical bay; fortunately there haven’t been any unexpected side effects of that change:

They also cleared the check engine fault code, on some implausible theory that they triggered it when fixing the accelerator pedal (the control to move it in and out wasn’t working, and the pedal was squeaking).

A tech took the coach for a long drive, and didn’t make the code come back. So we toaded up and left… but of course as soon as we got on the freeway, the fault code came back.

So we turned around and headed back to OMC:

They didn’t have any luck in tracing the issue (and may have triggered some new codes too).

We spent the night there, with the idea that they’d try again the next day:

Not entirely pleased with how things went. I used to like OMC, now I’m not sure I’d trust them with chassis stuff again.

We were on our way home after staying a night at Blue Ox RV Park in Albany, Oregon, when a check engine light and malfunction indicator light (MIL) came on the dash. Uh oh!

The fault was ECM SPN 102 FMI 18: “Engine – Engine Intake Manifold #1 Pressure. Data Below Normal Operating Range – Moderate”.

So we stopped at the next rest area, and I followed ChatGPT’s instructions on what I could see in the engine bay, but the fault was apparently likely somewhere that I couldn’t reach (and probably wouldn’t have been able to fix anyway). It was a Saturday, and Oregon Motorcoach Center was closed until Monday, so I made a reservation at Blue Ox again for the weekend, and we headed back. Sigh.

An interactive map:

Passing our site (the first empty one), and the site we came back to (the next one):

Soccer:

Joining I-5 North:

Canola fields:

BlueFire faults screen for ECM SPN 102 FMI 18:

Road works:

45th Parallel; we had stopped at a sign for the southern 45th Parallel in New Zealand, so it was fun to see a sign for the northern one:

More road works:

Rest area:

Looking at the engine:

Heading back to I-5, South:

Exit:

Back to Blue Ox; at least we didn’t need to check in at the office; they called us and said they’d check us in:

Our site, #145; we asked for one site over to give space to the neighbor, and for better Starlink signal (there was a tree partially obscuring our Starlink in the previous site):

I flew my drone:

Coming back here was not what we had planned to do with our weekend, but I’m glad we weren’t too far away, and Blue Ox had availability.