Results for "spark plug wire"

Engine Medium 2-6 hours 290 👍 1

Onan 5500 Generator Problems: Complete Repair Guide 2024

Spent three hours testing my 2014 Hurricane's Onan 5500 gen getting 11.8 volts output when every manual says it should be 12+ volts! Here's the weird part - when I disconnect the remote harness, the generator fires right up and purrs like a kitten. But the second I plug that remote connection back in, boom - both the remote start light AND the generator start light come on, and then... nothing. Won't start at all.

The really bizarre symptom is this chattering from the fuel pump when the remote is connected. I can literally feel the fuel line jumping around when I put my hand on it. It's like the pump is having some kind of seizure or something!

I'm guessing this has to be some kind of electrical issue between the control board and the remote system, but I've never seen anything quite like this before. Anyone dealt with this specific combo of symptoms on an Onan 5500? Really hoping there's a known fix because pulling this thing out of the RV again would be a major pain! …more

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Engine Medium 2-4 hours 94 👍 0

Ford E450 V10 Spark Plug & Coil Replacement Guide - RV Engine Maintenance Tips

After handling coil swaps on my old Chevy like they were nothing, this Ford E450 V10 setup has me completely intimidated and second-guessing everything. I've heard cylinder #3 is particularly difficult to access and I'm scared I might break something or use the wrong tools.

I tried using a 7mm wrench like some sources suggested, but it doesn't seem to fit properly and I'm afraid of stripping the bolt heads. I'm also concerned about how to safely reach the coils without damaging other components.

Can someone please walk me through the safest approach and tell me exactly what size wrench I should be using? I'd rather ask for help than risk making an expensive mistake. …more

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Solar Batteries Medium 2-3 hours 92 👍 0

Fix Renogy Lithium Battery Charge Percent Differences

Nobody has $200+ laying around for a service call — is there a DIY fix for Renogy lithium batteries showing wildly different charge percentages? About a year ago I installed 3 12v Renogy lithium batteries with a Renogy One Core control panel in my RV. Everything worked beautifully at first - the batteries were supposed to communicate with each other to keep all cells balanced, which is critical for lithium battery health.

Recently though, I've noticed the charge percentages are diverging by as much as 10% between batteries. Even worse, my One Core display keeps going blank and won't show charge percentages until I restart it. I've been through the manuals multiple times but can't find anything about troubleshooting charge percent differences or how to check for software updates on either the batteries or the control panel.

I know this communication/balancing issue could lead to serious problems if not addressed. Has anyone dealt with this before? I'm hoping there's a solution that doesn't involve replacing everything after just one year of use. …more

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Best RV Surge Protectors

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Engine Medium 2 hours 90 👍 0

Onan 5500 Generator Tune-Up Guide: Best Aftermarket Parts & Filters 20

Before my last camping trip when I tried to order replacement parts, I discovered that finding genuine OEM components for my Onan 5500 generator has become nearly impossible. The Cummins website has been showing most tune-up components as out of stock for months now, and when I do find supposedly "official" Onan oil filters online, many retailers are substituting generic filters that may not meet the same specifications.

I've been researching alternatives and I'm particularly concerned about getting the right oil filter and spark plugs. For the oil filter, I've seen conflicting information about whether aftermarket options like Wix filters are truly compatible - some sources mention the 57398 but I've read mixed reviews about fitment issues. For spark plugs, my current ones are NGK BPR4EY, and I've heard the NGK 3432 might be equivalent, but I want to make sure before ordering.

I'm also planning to stick with zinc-containing oil like Rotella T6 15w40 since I know air-cooled engines need the extra protection, but I'd love confirmation that I'm on the right track with quality aftermarket parts that won't compromise my generator's performance. What specific part numbers and brands would you recommend for a reliable tune-up when OEM parts aren't available? …more

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Engine Medium 3-4 hours 89 👍 0

Ford F53 Chassis Misfire Problems: Early Spark Plug & Coil Failure Solutions

Walked out to my 2021 Class A motorhome this morning facing the third Ford F53 chassis misfire this year and I'm done throwing parts at it blindly. We've got less than 20,000 miles on the odometer, but recently experienced rough running and got a check engine light. When I took it to a Ford dealer that services Class A rigs, they diagnosed misfires in two cylinders and recommended servicing the entire fuel system. I ended up having them replace all eight spark plugs, plug wires, and ignition coils since we were already dealing with failures.

The coach now runs better than it ever has since new, which makes me think the original components may have been subpar from the factory. What's really bothering me is that we shouldn't need major ignition system work this early in the vehicle's life. I'm curious if other owners of 2021 or newer F53 chassis motorhomes have experienced similar premature failures with their spark plugs, ignition coils, and plug wires? Is this pointing to some kind of quality control issue with Ford's ignition components on these newer chassis, and should I expect better reliability from aftermarket replacements going forward? …more

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Engine Medium 2-3 hours 86 👍 0

Ford E450 V10 Spark Plug Replacement: Easy Access to Cylinders 1 & 2

The second my wife mentioned that my E450 V10's engine bay "looks like it was designed by someone who hates mechanics," I couldn't stop thinking about these impossible spark plugs. I need to change the spark plugs on cylinders 1 and 2, but it looks like Ford's engineers were having a laugh when they buried these babies behind what appears to be half the engine's wiring harness.

I'm hoping there's some secret RV mechanic wisdom out there before I start disconnecting every wire harness bracket in sight. Please tell me there's a way to get to these plugs without performing major surgery on my engine bay. My back is already protesting just thinking about the contortions required! …more

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Engine Medium 30 minutes 85 👍 0

Ford F53 460 Engine Timing Marks: How to Locate and Check (Step-by-Step Guide)

About to drop serious cash on a used Class A motorhome with a Ford F53 460 engine — should I check those timing marks myself or am I asking for trouble? Where exactly are the timing marks located? I can see the harmonic balancer but having trouble spotting the marks and pointer. What's the best way to make them visible and actually read them with a timing light? …more

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Appliances Medium 90 minutes 82 👍 0

RV Water Heater Popping Noise: Causes & How to Fix

I found myself replacing the heating element, flushing the tank, checking every connection — but my RV water heater still makes these loud popping and crackling noises whenever it's heating up. It's got me a bit worried since I'm not sure what's normal and what isn't with these systems.

Is this something I should be concerned about? Could it be dangerous or cause damage if I don't address it? I've heard people mention draining water heaters but I'm not really sure when that's necessary or how to tell if that's what mine needs. Any guidance would be really appreciated! …more

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Engine Medium 30-60 minutes 80 👍 0

Onan 4KY Generator Starts Then Dies: Oil Pressure Sensor Troubleshooting Guide

About to sound like a total newbie here, but why does my 2018 Winnebago Spirit's Onan 4KY-26100R generator start perfectly then instantly die when I release the start switch? I suspect it's the oil pressure sensor based on what I've read, but want to confirm this diagnosis before ordering parts. Oil level appears normal. I've tried locating the oil sensor near the oil filler tube on the crankcase, but it's difficult to see or reach. Is there a way to test if the oil pressure sensor is actually the problem? Can I bypass it temporarily to verify that's the issue? …more

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Engine Medium 1-2 hours 79 👍 0

How to Fix Generac RV Generator Oil Leaks After Breather Hose Replacement Guide

Looked like a simple breather hose replacement on my Generac RV generator, but ever since I finished the job, oil has been leaking everywhere. I replaced the cracked original-style breather hose with a new version that now includes an elbow and short extension inside the air filter housing. While the hose replacement definitely helped reduce the oil drip, I'm still seeing some persistent leakage underneath the unit.

The new hose design appears to be an upgrade from Generac, with the uphill extension meant to help oil sucked from the crankcase run back down into the engine. I'm hoping this will further minimize the drip issue. I want to make sure I'm not missing something obvious before I take it to a repair shop. Has anyone else experienced similar issues with their Generac generator's breather tube? Any guidance on troubleshooting would be really appreciated. …more

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Engine Medium Decision process 77 👍 0

Onan Generator Won't Stay Running: Complete Repair vs Replace Guide 20

Three distinct sputtering sounds keep coming from my Onan generator that fires up perfectly but dies out after running for a while. Multiple service calls and repairs have been attempted, but the problems persist intermittently, making diagnosis challenging.

The repair costs are accumulating significantly, and I'm reaching a decision point regarding whether to continue troubleshooting or consider replacement options. What criteria should I use to determine when total repair investment justifies switching to a replacement unit? Are refurbished Onan generators a viable alternative, and what factors should guide this repair-versus-replace analysis for intermittent generator failures?

(Note: This is specifically about my RV's Onan generator, which I'm referring to as my 'Jenny'.) …more

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Solar Batteries Medium 1-2 hours 77 👍 0

How to Prevent LiFePO4 Battery Over-Discharge in RVs: Low Voltage Disconnect Guide

Planning a cross-country RV trip, but my Ecoflow Delta Pro keeps shutting down unexpectedly when running our AC, despite our 400ah LiFePO4 house batteries showing plenty of charge. Problem is the system drains our house batteries to 0% until the BMS shuts everything down.

Need a way to automatically cut power to the Ecoflow charger before the LiFePO4 batteries get too low. What's the best voltage cutoff point and what type of relay or disconnect device works for this application? …more

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Engine Medium 1-2 hours 75 👍 0

Ford F53 Motorhome Won't Start: Complete Troubleshooting Guide

Opened up my Allegro Bay 46 ft motorhome on a Ford F53 chassis after winter storage and now it won't turn over, dashboard lights are going crazy, AND the engine makes weird clicking sounds. When I turn the key, the warning lights cycle normally (except the check engine light, which does not turn on), and the engine turns over fine when I hit the starter. However, beyond that cranking action, absolutely nothing happens - no fuel delivery, no spark.

What I really need is a systematic approach to troubleshooting this F53 no-start condition. I want to make sure I check the most likely culprits first rather than randomly replacing parts. What are the common failure points on these F53 engines that cause this exact symptom pattern where it cranks perfectly but won't fire up at all? …more

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Electrical Medium 1-2 hours 74 👍 0

How to Locate Your Intellitec BD-0 Disconnect Switch Latching Relay in Your RV

Last month what seemed like a simple electrical hiccup in my 2005 Ford E450 Isata 250SL has spiraled into a complete system meltdown. My Intellitec BD-0 disconnect switch isn't working properly and I suspect the latching relay might be the culprit, but I'm honestly afraid I'm going to damage something if I start poking around blindly.

I've been searching everywhere but I just cannot locate this latching relay! I don't want to accidentally disconnect the wrong thing or cause any electrical damage to my coach batteries. Where exactly should I be looking for this relay? I'm being very cautious because I know RV electrical systems can be dangerous if you mess with the wrong components. …more

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Engine Medium 30-45 minutes to locate and replace 72 👍 0

Ford V-10 Temperature Sending Unit Location on Engine Block

I'm planning my next move after replacing the thermostat, flushing the coolant system, and checking all hoses — but I still can't locate Ford's hidden temperature sending unit on my V-10 engine block. Where exactly is this sensor positioned on the engine block? Looking for the specific location and what it looks like so I can identify it. …more

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