Results for "crankshaft sensor"

Woke up to my 2003 Itasca Spirit with Ford E-450 V10 chassis doing something bizarre — engine purrs like a kitten but zero RPM showing on dashboard. The dash doesn't have a factory tachometer, but I'd really like to monitor RPMs when towing and climbing hills.

What are the best aftermarket tachometer options for this setup? Looking for specific mounting solutions and wiring connections that work with the E-450's electrical system. …more

Finally found the starter relay for my 2022 RV's Ford 7.3 Godzilla engine that keeps staying engaged after startup — but will replacing it actually solve this? This has occurred multiple times and appears to be triggering crankshaft sensor errors, putting the vehicle into limp mode.

Diagnostics point to a faulty starter relay or incomplete grounding in the circuit. Need to locate the starter relay in the Ford 7.3 Godzilla to test and replace if necessary. Where exactly is this relay positioned, and what are the typical failure patterns for this specific issue on the 2022 model year? …more

Opened my RV hood this morning and my Ford V10 crate engine is doing that rough idle and power loss thing again — only when it's above 85°F outside. My 2015 Bounder 35K with 27k miles needed a complete engine replacement, so I had a new Ford V10 crate engine installed. Now I'm dealing with really rough idle, loud engine noise, shaking during acceleration, and hardly any power.

The shop said they fixed a misfire by replacing a fuel injector, but the problems are still there. Now they're telling me they've done everything they can with the engine and that it must be a transmission issue causing all these symptoms. Does that sound right to you experienced folks? I'm just having trouble understanding how transmission problems would cause such rough idling and engine noise, but I honestly don't know enough to argue with them. …more

Around 6am yesterday my 2017 Discovery LXE 39g's 360hp Cummins started showing catastrophic metal levels on the oil analysis report. I sent a sample to the lab for analysis, and they reported that aluminum, iron, and copper levels are higher than typical generic Cummins engine averages. The lab suggested this could be due to extended oil change intervals from the previous owner, but without any baseline data or service records, I'm not sure how concerned I should be about these elevated metal readings.

The RV was previously in an accident (shows on CarFax as comprehensive damage) with front-end body work including wheel, steps, fender panel, and front cowling replacement, though a Cummins mechanic spent two hours going over the engine with me and didn't find any obvious mechanical issues. The lab recommended testing again after 2000 miles to see if the numbers improve, but I'm wondering how to properly interpret these initial results when I have no previous data to compare against. What's the best approach for establishing whether these metal levels indicate actual engine wear or just the residual effects of poor maintenance practices? …more

Every time I see that P0339 code pop up on my Ford 7.3 Godzilla, I wonder — would crankshaft position sensor replacement be covered under my extended warranty? My 2022 RV with the 7.3 Godzilla engine (27k miles) threw a P0339 code along with hard starting and poor acceleration. Engine would barely turn over, then when it finally started it ran like garbage with warning lights everywhere. Could barely maintain 10mph before I had to shut it down.

Here's the weird part - I cleared the codes with my scanner and everything went back to normal! Engine starts fine now and runs perfectly. But I'm worried this is just the calm before the storm. What does P0339 actually mean on the Godzilla motor, and should I expect this problem to come back? Really hoping this might still be covered under warranty since the miles are so low. …more

Wondering which ignition component to grab from this auto parts store aisle when my RV engine has zero spark and won't start. engine turns over fine but just won't fire up. I'm pretty sure it's a no-spark situation since I can't get any ignition happening. I've already tried replacing the coil twice, the distributor, and the ignition switch, and I still have 10-11 volts going to the coil but no spark.

Been reading that this could be a few different things - maybe the crank sensor went bad, or possibly the ignition module, or even the coil itself? I'm decent with basic troubleshooting but honestly don't know the best way to test these components systematically. Don't want to just start throwing parts at it and hope something works. What's the smart approach to figure out which component is actually causing the no-spark issue? …more

Standing at the dealership getting quoted $3,200 for a complete fuel system replacement on my 1998 Bounder Ford 550 that cranks but won't start, and this feels like total overkill. I can hear the fuel pump running when I turn the key, so that seems okay. Battery is good, connections are clean.

What are the most common causes when you have good cranking but no start? I need to know the best diagnostic steps to narrow this down quickly. …more