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John at Prevost Jax Saves the Day – Again
Just when I thought all was right in the world, I get a “check engine message on the display” followed by a slight derate and my boost gauge going to zero. It happened several times and my concern was it getting worse and could it shut me down somewhere on I-70 near BFE. No orange check engine light, just the message center.
So I talked to PASS, Detroit, Jon, Ken and everyone else I could think of to try to sort it out and everyone tried to help. Got to KC and parked at Big Al’s and he got me an appointment at a Detroit shop near KC. Got to give Al credit, if you’re in need, he’s the guy to help.
Then I called John at Jacksonville. He’s seen this on 10+ buses and it has to do with the wiring harness and a recall for the Barometric Pressure Sensor and harness. He walked me through how to bypass the sensor/harness, expaining that I would get the check engine light, but I would have full boost to get me to Nashville. Made the plug swap in about 3 minutes, tested the bus and good to go. It appears the amber check engine light on the Telltale is not working or has been intentionaly disabled or tampered with. There was a stored code as Inactive for pressure boost.
There is no alternative for experience and John at Prevost Jacksonville took the time to help me out and got me on the road and even e-mailed Nashville to tell them what I needed. This is service beyond the norm and unless you’ve been on the road and facing a problem with no clear solution, you can’t appreicate this man’s help and expertise.
I’m sure glad he’s there……
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10 Replies
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That’s great news, glad you got the issue resolved.
Ken
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John is the best for Prevost service! He took the time to explain to me how to replace my fan clutch.
He has helped me with several issues.
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Speaking of fan clutch changes. Prevost in Richmond, BC installed a new clutch in my 2004 H3. Turns out the old style has been superseded. The new one is a slightly larger dimension and required repositioning the entire fan pivot braket (the part that get’s cinched down by the inflatable air bags). I’m still not pleased with the fan’s orientation in the shrouding. It’s canted over such that the bottom edge of the fan is out from the shrouding around and inch while the upper end is complete inside the shrouding. I suppose a smaller circumference set of fan belts might solve this problem. Has anyone here experimented with this?
Thanks
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David,
Is that because your clutch support assembly is tipped towards the radiator?
If that is the case I’ll agree a shorter belt would likely cure it. Just make sure that with the belt off the travel towards the radiator is limited so the fan cannot contact the radiator so if the belt breaks it will not damage the radiator and the fan. Mine has a physical limit on travel that prevents contact, but it sounds like yours has changed dimensionally with the new clutch.
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Tom and Nancy back on the road again in there new Marathon H out of KC to Nashville, Wednesday morning.
Just a little drama over a check engine light coming into KC.
The engine boost is fixed and back at 100% turning out to be a wiring issue with a harness recall. Nashville will cure it permanently… Truk’s next stop.
A replacement of the A-35 A/C compressor belt which Tom found had a cut. A quick trip to our local NAPA store had one in stock. Crossed my fingers calling for a stock check, they had one. Never would of heard the end of that conversation had NAPA been a zero count. Out came the heavy duty 1/2 drive sockets and wrenches for replacement.
Also Tom and Nancy had a little boost themselves at our favorite local Mexican restaurant. Oh… did I mention margaritas, getting our nose into a couple of them.
Great visit
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Tom,
Glad you got it all sorted out… yesterday on the way to Colberg to get some stuff fixed before we head to Canada and Alaska… I got the check engine light on the telltale and in the LCD display got check engine at next stop… I checked it all out and everything looked and sounded fine to me… Turbo pressure was showing normal but it seemed a bit sluggish… if I let off the pedal light would go out… as soon as I pressed the gas light came on again… Not sure what the deal was but PASS wasn’t working last night… kept getting a recording… tried calling Nashville same deal… even had my mother in law call from a land line… Spent the night in a rest stop and fired it back up this morning… no problem… lots of power and drove 700 miles to colberg and the light never came on again… was able to get PASS and they said to have it checked out… but driving was OK… When I couldn’t get PASS… I called Al… he was a great help as always…
Bill
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Not sure if it’s the same issue Bill, but anythings possible. Use your information center and go to “diagnostics” then select “engine” and it should tell you what code was stored. It will be either text or numberic depending on how your information center is setup. If it’s numeric, just look that number up in your engine book to see what code got stored.
I seem to have a dead check engine light in the Telltale, but it does come up on the information center. Going to get that checked out as well in Nashville.
Herman Service – You can’t beat the service at Iron Horse Storage in Peculiar, MO. Big Al will help turn wrenches then drive you to the local Mexican joint for vittles. We could have had steak, but this bus trip is putting a real strain on the trukman wallet. I tried to get Al to buy, but no way, I got him greasey and one of his hairs was out of place, so dinner was on me.
Jon – Send money….
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Money? What’s that?
I’m so poor I have to grow my own food.
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I’m so poor, I can’t pay attention ! George
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Bill,
That probably stored a code.
In my case was a defective EGR valve, we have 2 per engine.
Lots of early problems with that part. Piece of carbon keeps valve open on de-acceleration, thus the on and off light with throttle operation.
Rebuilt EGR valves were better then new EGR valves I was told.
AL
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