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We have a 1994 E350 Class C motorhome,
460 engine. Hesitates/jerks while driving along,this does not seem to happen when pulling hard. Could it be fuel filter,fuel pump, transmission, shifting problems? This happens in all types of weather. Another problem..in hot weather truck won't run, have been told it is vapor lock, when we let it cool off problem seems solved. Any suggestions to the above questions.
Marcel
Marcel here once again..just got back from an 1,800 mile road trip and our motorhome with the Ford 460 engine worked great..not a hesitation or sputter or burp the entire trip. Our problem is fixed,see my post of:7-14-09
Good luck to all...hope this helps.
I have an 88 Winnebago with 460 w/4bbl carb. Most of the time I go to start it and it cranks good but no start. Sometimes it starts, but I don't see a pattern to it. Put my timing light on tonight and there is no spark while cranking. Replaced the wires, cap, rotor, plugs. What's next? Module? Pickup?
Also, when I go to look for parts online (e.g. Autozone) the latest 460/4bbl listed is 1986, then they only list the fuel injected engines. Should I be looking for parts for a 1986 to fit my 88?
I just posted a very similar issue with my 90 Ford E350 with a FI 460 / C6 driveline. Where you able to resolve the issue? Please share your findings with me, thanks.
OK to diagnose: find the fuel pump relay and figure out how to bypass it. Second figure out how to do an easy check for spark. I have been left the dog house loose so I could yank it in a hurry for this. When it quits, Check for spark. If it has spark hot wire the fuel pump and see if it runs. If no spark you have a bad pick up, module or if its all integrated into the engine computer perhaps one of those. The pickup and module are most likely as they take the most heat punishment. The fuel pump relay should not be run hot wired as it is an important safety item! The computer controls that, and you will need to figure out if the control system (Computer and wiring) works or the relay is bad. (Cheap and Easy fix) The Fuel pump itself may be bad. Look at all the Dodge Mini vans sitting beside the road first really warm day of summer. My freind in the parts buisness sells out almost every spring. Good luck
Marcel here again. Just picked up the motorhome this AM and this is what the mechanic did:
Diagnosis engine"miss and hesitation"...performed a lab scope test on MAP sensor. Check spout and PIP signals, scope pattern showed A/C circuit spikes on MLP sensor circuit.Replaced the MLP sensor and had his friendly TV repairman fix the leaking capacitor. Works great on the trip home. Going on a long road trip and that will be the test.
Have a good feeling about this, hope this helps others.... Marcel
1987 e 350 motorhome with a 460,i loose power going up hills i've replaced both fuel pumps ignition coil ignition modual spark plugs fuel diverter valve thats just before the carb, new one has a smaller orfice for the return of fuel to the tank, new filter, rebuilt the 7 year old carb, it will run fine if i floor it and then about 8 seconds i loose power, when i let off the gas and lightly touch the gas peddal i can resume but if i put my foot into it again i can stall the engine, its so bad now that i can only get to about 40 miles an hour if i push it the engine acts like its running out of gas,thank you
I have an 1987 Minnie Winnie motorhome with the Ford carberated 460 and it starts after pumping the gas 5-10 time, runs for 5-10 seconds and stalls, I pump it again 5-10 times and starts again...I have replaced the carb, plugs, wires, coil, fuel filter seems good...any ideas would be really appreciated as it is stuck in a campground with winter knocking on the door....
I have fought the fuel wars with my coach for 10 years. I think the design is a poor one.
There is a sock filter on the fuel pump in the tank that gets dirty and can cause the problem. It only comes with a new fuel pump. So drop your tank, pull the pump and clean the sock with some kind of solvent and blow clean.
Mike
I have a 1990 Ford 460fi Cobra Motorhome, F-53 chassis. 54,000 miles. It runs great except for a slight speed increase with slight pressure on the accel, or going up a slight incline. It is as if it is changing a half gear between O/D and Drive hardly noticeable.(not a gear change) It does need a new thermostat, would that make a difference? Also it has a new c-6 tranny. When I let up the speed lowers slightly. What would you suggest I check? Thanks.
Also on this 87 on my motorhome when its sit in the driveway it runs great when i put it under a load it drives for a while then act if it starving for fuel but if i pull of the raod let it sit for a min it goes for a while and does it again. i replaced the map sensor and cked vac hoses its a fuel injected 460 motor and replaced both fuel pumps too and filters twice. i need help..mike
I have 87 e350 motorhome w fuel injection i have replace both fuel pump and presured tested it 45 lbs.when key on 35 when running when i test drive it it looses power when i put foot in it i back off & it will go for a bet replaced fuel filter 2 times and the black fuel canister on frame rail what else can do ???
I have a 1993 Ford Minnie Winnie DL (460). Never had a problem with it starting and running until today (30 days after i drove it 30 miles). Now it will start good, but only run for 2-3 seconds and then die. If i manually push the gas pedal it will run, but it has a loping about it (up and down) on the down side it dies.
Just put a fuel pump on 2000 miles ago, replaced fuel filter, plugs, wires, dist. cap/rotor and still the same problem. Can you please help give some suggestions.
I spent hundreds of dollars at Mieneki trying to resolve this very same issue with 1987 Coachmen with 460. I found an inline fuel filter along the frame rail. Replaced and issue is resolved.
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