Results for "E350"

Engine Medium 2 hours 97 👍 0

Ford V-10 Misfire Codes P0305 & P0307: Complete RV Engine Repair Guide for Motorhomes

Turned my compression tester on cylinders 5 and 7 and got 150 PSI readings, but I'm still pulling P0305 and P0307 misfire codes on my 2001 Ford E350 V-10. The engine runs smoothly overall, but the diagnostic codes are persistent.

I have replacement spark plugs and ignition coils available but want to ensure I'm following the proper troubleshooting sequence before investing time and effort. What is the recommended diagnostic approach for simultaneous misfires on cylinders 5 and 7?

Given that multiple cylinders are affected, should I prioritize certain components over others, or is there a systematic order that typically yields the most efficient resolution for this engine configuration? …more

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Chassis Easy 30 minutes 90 👍 0

Ford E350 Dually Wheel Center Hole Size Guide: Front vs Rear Differences Explained

According to my mechanic, my Ford E350 dually has mismatched wheel fitments, center holes that don't align properly, AND different sizing between front and rear wheels all at once. I have a 2001 Ford E350 Class C motorhome with dual rear wheels, and I desperately need to get a spare tire sorted out.

I found what I thought was the perfect rim - same bolt pattern as my existing wheels - but when I got home and really looked at it, the center hole is noticeably smaller than the ones currently on my RV. I've been assuming all six rims on a dually setup would be identical, but now I'm second-guessing everything.

Could it be that Ford actually uses different center hole sizes between the front wheels and rear dually wheels on the E350? I'm really hoping someone can clarify this because I need to know if I bought the wrong type of rim or if there's something else I'm missing here. …more

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Electrical Easy 30 minutes 86 👍 0

1988 Fleetwood Tioga Ford E350 Ignition Relay Location Guide

Last weekend I bought my first RV, a '88 Fleetwood Tioga Arrow (Ford E350 chassis, 460 V8), and I'm completely clueless why it won't start. I've already swapped out the starter solenoid on the fender, but now I'm being told there's also an ignition relay that could be the culprit.

Problem is, I can't for the life of me find this thing! I've been crawling around the engine bay for what feels like hours. Anyone know the typical spots where Ford hid the ignition relay on these E350s? Really don't want to start randomly pulling relays until I find the right one... …more

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Electrical Medium 1-2 hours 84 👍 0

1991 Ford E350 Winnebago Battery Ground Wire Location: Complete Troubleshooting Guide

Wondering if anyone else has dealt with corroded battery cables on their Class A before — replaced them easily last time, but this 1991 Ford E350 Winnebago's ground wire location has me completely stumped. I've traced the ground cable to a tie strap on the fender, but that's obviously just a routing point, not the actual termination.

Where does the battery ground cable actually terminate on these E350 chassis? Need to find the real connection point so I can clean it properly and install the replacement cable with a solid ground connection. …more

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Engine Medium 1-2 hours 81 👍 0

RV Wireless Air Suspension Problems: Complete Troubleshooting Guide

Wireless air suspension controller stopped communicating with the compressor module last week. Bags inflate manually at the valve but the wireless remote and dash controls do nothing. System worked perfectly for two years and just quit. …more

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Solar Batteries Medium 2 hours 76 👍 0

Ford E350 RV 20 Amp Charging Limit: DC-DC Charger Solution for LiFePO4

Noticed the Ford manual shows standard charging rates for my E350, but after upgrading to LiFePO4 batteries I'm only getting 20 amps max. Expected to see crazy high charging rates when I first tested it, but nope - stuck at exactly 20 amps whether I'm idling or revving to 2500 rpm.

I ended up installing a DC-DC charger anyway (heard too many horror stories about frying alternators), but I'm still curious - is there something from the factory that's limiting me to 20 amps? Like maybe Ford built in some kind of isolator or something to keep the original lead-acid batteries happy? Just seems weird that it's such a consistent number regardless of RPM. …more

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Engine Hard 3-4 hours 75 👍 0

1988 E350 Class C 460 EFI Won't Start - Advanced Fix

Got stuck with this 1988 E350 Class C 460 EFI that the previous owner left me — thing absolutely refuses to start. My 1988 E350 Class C with the 460 EFI decided to throw the ultimate tantrum right as we were heading out for a trip - just completely died and refuses to start.

Here's where it gets fun (and by fun, I mean expensive): I've got spark, I've got 40 psi fuel pressure at the rail, timing looks good, and I've already thrown money at fuel pumps, filters, plugs, wires, TFI module, distributor, and even the inertia switch. The thing will occasionally act like it wants to fire but never actually starts. The real kicker? Even when I give it a shot of ether, absolutely nothing happens - not even a sputter!

At this point I'm wondering if there's something more advanced going on that I'm missing. When you have spark, fuel pressure, and timing but even ether won't make it fire, what else could be the culprit on these 460 EFI engines? …more

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Engine Easy Informational 74 👍 0

Ford 7.3L Godzilla V8 Engine Lifter Failure: 70K Mile Analysis & Prevention Guide

Somewhere between shock and disbelief, I'm questioning my Ford dealer who insists my 2023 E350's 7.3L Godzilla V8 needs a complete rebuild after lifter failure at just 70,000 miles. The engine had one bad lifter and two scored piston walls, which seems pretty severe for a relatively new motor with what should be considered moderate mileage for a commercial-grade engine.

This has me concerned since I'm considering a similar setup for my Class C motorhome build. The 7.3L Godzilla has been marketed as Ford's heavy-duty solution, so seeing this kind of failure relatively early is troubling. Is this an isolated incident or are there patterns of lifter problems emerging with these engines? What should potential buyers be watching for, and are there any preventive measures or early warning signs that could help avoid this kind of expensive failure?

I'd appreciate any insights on whether this represents a broader reliability concern with the 7.3L platform or if it's just an unfortunate one-off situation that shouldn't influence purchasing decisions. …more

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Engine Easy 1 hour 71 👍 0

Ford V10 Lower Radiator Hose Replacement: Complete RV Repair Guide

Standing next to my Ford V10 E350 staring at this lower radiator hose that's clearly shot and needs replacing before my next trip. The complex multi-segment design of the V10's lower hose system has me a bit concerned about the replacement process, especially since I've heard these can be tricky to install properly.

Specifically, I need to understand the complete procedure from start to finish. What's the proper way to drain the coolant system before starting? Are there any special considerations for hose selection or clamp replacement that I should know about? Most importantly, what's the correct bleeding procedure afterward - I've heard air pockets can be a real problem with the V10 cooling system if not done properly.

I'm planning to tackle this myself in my driveway, so I want to be fully prepared with the right steps and any tips that will help ensure the job goes smoothly without any cooling system issues down the road. …more

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Engine Easy 30 minutes 67 👍 0

2005 Rusty Spare Rim on 2001 E350 RV: Safety Guide and Inspection Tips

Before I do anything else with my 2001 E350 RV, this rusty spare rim is eating through my confidence way faster than it should. The rim currently holds air pressure with an old 2005 tire mounted, indicating the bead seat may still be functional. However, I'm concerned about the safety implications of using a rim with visible rust damage on a 13,000-pound RV.

Specifically, I need to determine: Is surface rust on the outer rim area a structural concern or merely cosmetic? What's the proper inspection protocol when having a new tire mounted? The rim appears to seal properly at the bead, but I want to ensure this spare is roadworthy before installation. …more

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Electrical Medium 2-3 hours 67 👍 0

How to Fix 2001 Ford E350 RV Cruise Control Brake Light Circuit Problems

Every time I mention my 2001 Ford E350 RV's cruise control issues with brake light circuit resistance, I feel stupid asking, but why does this keep happening? According to the service manual, I should be reading less than 20 ohms between pin 4 and ground, but my multimeter shows 50 ohms consistently.

The cruise control system monitors the brake light circuit through the light filaments to detect brake application. With this higher-than-spec resistance reading, the cruise control will not engage properly. I've already replaced the brake pedal switch and master cylinder switch, but the resistance remains at 50 ohms when measured at the pedal switch.

What typically causes this excessive resistance in the brake light circuit, and what is the complete wiring path from the brake switch to the rear lights that I need to inspect? The brake lights themselves function normally, but this out-of-spec resistance is preventing cruise control operation. …more

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Engine Medium 2-3 hours for diagnostic testing 66 👍 0

1991 Ford E350 460 Engine Oil Pump Issues - Diagnosis Help

Somewhere between last month's slightly low oil pressure reading on my '91 Ford E350 460 engine and today's complete engine knocking, I'm thinking this oil pump is finally dying.

Here's the weird part - oil pressure gauge sits really low (like concerningly low) but the temp gauge never even hits the middle, stays cool as a cucumber. She runs like a total champ though, starts every time, smooth as butter, pulls hills no problem. Just hit 99k miles and put about 7k on her this year with zero issues performance-wise.

Everything I'm reading online says oil pump problems usually show up as low pressure AND high temps together. But I've got low pressure with low temps, which seems backwards? Had one moment recently where the oil pressure suddenly jumped to normal mid-range after smelling some hot oil at a gas stop. Is this actually pointing to oil pump failure, or am I maybe looking at faulty gauges or sending units instead? …more

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