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PT & WB (Twin Axle Pusher Unique Issues) If you have a unique issue with your PT or WB model coach and it can't be answered in one of the other forums here, then this is where you can list it....list your PT Parts here too.

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  #1  
Old 02-02-2020
Clueless Clueless is online now
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Default 96 S60 Intermittent Check Engine Light

My Check Engine Light has been flicking on and off since Texas and we are now in Pahrump, Nv.. It started as occasional, two days ago it was on for the first 40 miles then off for the rest of the day. Yesterday it was on after about 10 minutes, off for a 10 mile 6% pull, then on most of the day until coasting down a long hill near the end of the trip.

Silverleaf diagnostic shows a fuel temp high voltage on initial engine start, but this doesn't come in and out like the check engine light. That's the only code.

Temps and oil pressure are normal.

Noticed the racor reading to be quite low even during pulls indicating maybe a plugging primary fuel filter. Is there a sensor on that which is pinging the alarm?

Can't seem to find the right print to quit going in circles.

Does this check engine light get triggered by the DDEC or is it a Bluebird monitoring setup that triggers this light?

Thanks in advance for your suggestions or clarification.
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David Styf
82 FC 33 SB SOLD
89 SP 36 Silver Edition SOLD
96 WB
Valparaiso, In./Baldwin, Mi.
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  #2  
Old 02-03-2020
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Shahin Shahin is offline
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Hi David,

Hope you and Tina are doing well despite a bit of engine issues! As you know I know nothing about engines and mechanical stuff. But I know a great mechanic in Fresno CA in case you think it’s worth while to call him.

The shop name is:
Diesel Diagnostic Tech.
The owner's Name is Rami Fayad

(559) 264-2891 shop
(510) 688-2465 cell
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1991 PT40WB
sskhosravi@gmail.com
www.coddiwomplers.org
650.653.1539
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Old 02-03-2020
Flyfisher Flyfisher is offline
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The DDEC sends the signals to check and stop engine lights. Did BB get involved too, hard to say, but I don't believe so. If they did chassis wiring diagram 1729813 will show it. In the blue box and thumb drive.

The DD service manual section 2 Fuel System page 2-99 describes the DDEC III sensor input signals to the module. Since your only flash code is for fuel temperature high voltage, I would begin there. The sensor is located in the secondary fuel filter head (manual section 2 page 2-153). Try disconnecting and cleaning the harness connector. The sensor is getting old, replace it, that'll be one less sensor to worry about.

There is no electronic signal sensor input to the DDEC from the Racor and low dP across the filter is good. The most accurate input due to filter plugging is from the gauge on the Racor filter cover, it will read slightly higher than the dash gauge. If the needle is in the red 10" or greater I recall, then you've got a problem.

Sorry to read about your luck, call me if I can help,,,I'll be fishing.....
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Dakota (our Aussie traveling buddy)
Beverly Hills, FL
1996 WB42 (SOLD)
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Old 02-03-2020
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While Andy may be correct,i would check the coolant level first,its easy to check and needs checking anyway.
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Old 02-03-2020
Flyfisher Flyfisher is offline
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Quote:
While Andy may be correct,i would check the coolant level first,its easy to check and needs checking anyway.
The Silverleaf coolant level gage will go to 0% and back to 100% if the level switch is becoming intermittently uncovered. It's been replaced and is new also, but its just a switch, there is no actual level indication like the Silverleaf would lead you to believe. But, if you fill the expansion tank until the sight glass shows coolant when cold, that bus will just puke it right out when it gets hot until it reaches its happy point. I waisted a lot of coolant refilling until I figured that out and just left it alone. Just watch the Silverleaf for a 100% reading. Now if it goes to 0% and stays there when hot, the DDEC will generate a flash code because the switch is uncovered and it needs coolant.

Come by and we'll fix it, I'm getting bored anyway!
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Dakota (our Aussie traveling buddy)
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1996 WB42 (SOLD)
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Old 02-03-2020
Clueless Clueless is online now
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Thanks guys, I was in the DDEC manual reading about troubleshooting that fuel temp sensor and it’s wiring. Stuff I hesitate to do in the desert or a campground so I was hoping for an add headlight fluid or piece of tape over the light solution.

And I’m looking for a place to be from mid March to early April including St. Patty’s day so be careful what you offer.
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82 FC 33 SB SOLD
89 SP 36 Silver Edition SOLD
96 WB
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Old 02-03-2020
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Theres lot of places to park in Nevada.
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Old 02-03-2020
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Quote:
Originally Posted by Randy Dupree View Post
Theres lot of places to park in Nevada.
And John Hall is here to show me how to get to them!
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82 FC 33 SB SOLD
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96 WB
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Old 4 Weeks Ago
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Finally back on the road with a new fuel temperature sender and the check engine light has not come on for about 500 miles. A 10 minute job to change it. I could see it or touch it but not both at the same time so the job was done by feel.
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82 FC 33 SB SOLD
89 SP 36 Silver Edition SOLD
96 WB
Valparaiso, In./Baldwin, Mi.
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Quote:
Originally Posted by Clueless View Post
Finally back on the road with a new fuel temperature sender and the check engine light has not come on for about 500 miles. A 10 minute job to change it. I could see it or touch it but not both at the same time so the job was done by feel.
where is it located?
got pics?
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