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Topic: plugged exhaust (Read 607 times) previous topic - next topic

plugged exhaust

96 U280 C8.3 anyone ever have a plugged exhaust. I am getting high exhaust temps ( 800 degree on flat and 1300 on a hill. max boost is 26) and its fall on its face up hills. Air filter is new and no restrictions on the intake
1996 U280 36 ft. With C8.3 Allison 6 speed With retarder. Purchased from Jimmy Fraytag
Previous  1990 Grand Villa 36 ft. with Cat 3208

Re: plugged exhaust

Reply #1 –
26 psi boost is about 5 psi above stock specs. Does that have the banks kit Installed?
Seems to me you would not be getting those boost numbers with plugged exhaust are you sure your brakes aren't dragging...
Doug W.
96 36' U270 CSGI #4946
04 Toyota Tacoma 4x4
PNW

Re: plugged exhaust

Reply #2 –
Fuel lines go bad and may be leaning out the motor? Leaks in my 320's Winn system also causes issues.

"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: plugged exhaust

Reply #3 –
You may have an issue with the muffler. 

When muffler grows old occasionally the internal baffle's break down
(come loose) and fall into the exhaust stream, restricting flow..

No way to check it (that I'm aware of) other than replacing the muffler.  pc
S/W Houston 95" U320C SE/40' 
Build #4778  Cummins M11
Repairs & Covered RV Parking (BAO)
PPL is close..

Re: plugged exhaust

Reply #4 –
My Banks on the 8.3 goes up to 34lbs on a good climb so those numbers are low for a Banks. I would say take that exhaust off and put in Resonator and see the light of day. As P change said your muffler has collapsed.
JohnH
Coachless, now use aircraft. 2003 Ford Travelair TC280 class C. Super shape. Just for 1 yr .
1994 Ford E350 ClassC,total renovation inside and out. Now sold.
2000 U295  36' Cummins 350 c/w Banks Stinger, Resonator upgrade,Solar, LED lites.Residential fridge with slide out pantry. Build 5674. Sold
ex 92 GV 022C ored Cummins. Sold
ex 95 GV240 cat 3116. Sold
2017 Mini cooper s & 2016 land Rover LR2 HSE  LUX.
jhaygarth@aol.com    SKP #130098
treat everyone as you would like to be.

Re: plugged exhaust

Reply #5 –
Quote from: John Haygarth –
My Banks on the 8.3 goes up to 34lbs on a good climb so those numbers are low for a Banks. I would say take that exhaust off and put in Resonator and see the light of day. As P change said your muffler has collapsed.
JohnH

John, You have electronic fuel delivery system on your 8.3 vs a 1996 8.3  mechanical. Totally different Banks System.
Takes boost to add fuel on the mechanical and surely he's doing that with his exhaust temperatures....Not sure he could achieve the boost that he's seeing with restriction in the exhaust. No doubt a resonator is an easy and cheap upgrade.
Doug W.
96 36' U270 CSGI #4946
04 Toyota Tacoma 4x4
PNW

Re: plugged exhaust

Reply #6 –
Have you had your valves adjusted and injection pump timing done?  Incorrect timing could lead to the symptoms you are describing. 

Also, are you sure that you are getting the correct fuel pressure to the injection pump, as a lack of fuel pressure will lead the engine to drop off when the it starts spinning fast. 
Robert
Build # 5304
1998 34' U270 Cummins 6CTA8.3
 

Re: plugged exhaust

Reply #7 –
Check the lift pump,can be had for under $100.
96 U270 BUILD 4810
85 380SL
Drummonds TN.