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Top Speed 10 mph
My Newell was parked in my shop for about a month after running great on our last trip. It started great and ran fine as I moved it around the driveway. Once I turned onto the road it would not go above 1000 rpm. I turned around and limped home. I replaced both the primary and secondary fuel filters. It will start...sometimes readily but sometimes it cranks a bit . Altogether I have had it running for approximately 1 hour since changing the filters. At first I had to hold the accelerator pedal wide open just to keep it running at 1000 rpm. It would not go on fast idle at all. After a while I could get it to idle at 500 rpm and fast idle at 750 rpm. After running on fast idle for about 10 minutes it just died. It re-started and idled after that. I filled the filters with fuel before installing and I think it has run enough to work the air out of the system. I have visually checked the air intake. It has been suggested that the computer may be limiting it because of a code. The "check engine" and "stop engine" lights come on momentarily at start-up as normal. I think it is a DDEC 3 engine operating system (1993). Can anybody guide me on how to retrieve engine codes? Or offer any ideas as to why it is limited to 900-1000 rpm .
1993 Newell 45' 8V92,towing an Imperial open trailer. FMCA#232958 '67 Airstream Overlander 27' '67GTO,'76TransAm,'52Chevy panel, 2000 Corvette "Lingenfelter"modified, '13 Grand Cherokee.
you will need a code reader or a vmspc silverleaf to read it. no other way.

if you are going into limp mode, you should most likely have had a check engine light. what you are describing is exactly what i have seen in the derating mode

2002 45'8" Newell Coach 608  Series 60 DDEC4/Allison World 6 Speed HD4000MH

Not sure if this helps but when I bought mine the seller had the same problem

Turns out it was one of the two DDec fuses was bad.

Changed the fuse and was good to go
I had the same problem on the way home from buying my coach in Kansas. We made it to Waco tx. and it lost power. The circuit breakers felt crunchy when I tried to reset them.
I bypassed the circuit breakers with 20 amp fuses and have not had any further problems. ( It did feel like it was running on 4 cylinders when it was happening).  Paul
Paul and Sherry Schneider
1994 newell coach 366, 38 ft with a 8v92 ddec 2

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