Question 2007 E450 V-10 loss of power

[Olddawg]

You might look here. FORD Technical Service Bulletins (TSBs) - Ford Truck Enthusiasts Forums

Thanks I looked through all of them ,but nothing pertained to my citation

 

[Olddawg]

Just to verify throttle sensor you can test it easy enough

I check throttle sensor..it’s working properly

 

[Olddawg]

Just to verify throttle sensor you can test it easy enough

I tested it..looks good

 

[offroader09]

I think your going to have to put a scanner on it and get some live data. The Autel MX808 MaxiCheck is a good mid priced scanner at about $380.00. It is not a $90.00 code reader but a true diagnostic scanner. Current shop rate in my neck of the woods is now $195-$220 so does not take long to justify the cost.

 

[Olddawg]

I think your going to have to put a scanner on it and get some live data. The Autel MX808 MaxiCheck is a good mid priced scanner at about $380.00. It is not a $90.00 code reader but a true diagnostic scanner. Current shop rate in my neck of the woods is now $195-$220 so does not take long to justify the cost.

I have a scanner that shows live data..but I’m in Bay Area California and the shops I would trust to actually find the problem won’t take motorhomes..there are shops who would offer to try to diagnose my problem, but I don’t fell like paying for nothing…what I need is a Ford mechanic with tools and experience..where I’m at I haven’t found one..I would absolutely pay for someone to diagnose my problem…

 

[offroader09]

I have a scanner that shows live data..but I’m in Bay Area California and the shops I would trust to actually find the problem won’t take motorhomes..there are shops who would offer to try to diagnose my problem, but I don’t fell like paying for nothing…what I need is a Ford mechanic with tools and experience..where I’m at I haven’t found one..I would absolutely pay for someone to diagnose my problem…

Finding good mechanics is getting harder and harder. Not a lot info on your issue. But no check engine light so probably no codes. Has it been sitting long enough to have bad gas? Sounds like you have spark and fuel could be a timing issue, like it is not advancing due to a cam sensor. Early V-10s had issues with blowing out spark plugs. Maybe one or more plugs is not seated causing low compression. Maybe not engine related, but transmission? Just throwing spit balls. Can you drive it with the scanner and watch the O2 sensors, fuel pressure, timing advance, TPS, and look for torque convertor fully locked up. Using the scanner you can shut off one coil or fuel injector at a time and see if you have a dead cylinder. Unplug the EGR valve see if any change.

 

[Kevin D Pem]

How do I check ping sensor?

Google it! All I know is it is a detune measure!

 

[Kevin D Pem]

I have a scanner that shows live data..but I’m in Bay Area California and the shops I would trust to actually find the problem won’t take motorhomes..there are shops who would offer to try to diagnose my problem, but I don’t fell like paying for nothing…what I need is a Ford mechanic with tools and experience..where I’m at I haven’t found one..I would absolutely pay for someone to diagnose my problem…

You can be the best wrench mechanic in the world! But in a world of electronics that hides much of the old way of diagnosis, you are held impotent. The diagnosis from a competent technician is worth every penny you will spend on them!!! And everyone deserves a wage!!!

 

[Olddawg]

Finding good mechanics is getting harder and harder. Not a lot info on your issue. But no check engine light so probably no codes. Has it been sitting long enough to have bad gas? Sounds like you have spark and fuel could be a timing issue, like it is not advancing due to a cam sensor. Early V-10s had issues with blowing out spark plugs. Maybe one or more plugs is not seated causing low compression. Maybe not engine related, but transmission? Just throwing spit balls. Can you drive it with the scanner and watch the O2 sensors, fuel pressure, timing advance, TPS, and look for torque convertor fully locked up. Using the scanner you can shut off one coil or fuel injector at a time and see if you have a dead cylinder. Unplug the EGR valve see if any change.

I’ve replaced all the gas and filter fuel pressure is good and doesn’t leak down sparks plugs are new coils were just replaced I actually had new ones on my shelf lucky me! I drove with scanner hooked up along with fuel pressure gauge and everything checks out thought I was missing something so I had another reputable mechanic I know ride with me he says the same just one of those tough jobs but I’m sure it will be something stupid easy

 

[Kevin D Pem]

Finding good mechanics is getting harder and harder. Not a lot info on your issue. But no check engine light so probably no codes. Has it been sitting long enough to have bad gas? Sounds like you have spark and fuel could be a timing issue, like it is not advancing due to a cam sensor. Early V-10s had issues with blowing out spark plugs. Maybe one or more plugs is not seated causing low compression. Maybe not engine related, but transmission? Just throwing spit balls. Can you drive it with the scanner and watch the O2 sensors, fuel pressure, timing advance, TPS, and look for torque convertor fully locked up. Using the scanner you can shut off one coil or fuel injector at a time and see if you have a dead cylinder. Unplug the EGR valve see if any change.

No code! No miss!
No o2 sensor code, proper fuel ratio.
Ping should put up code, no code bad sensor.
Skipped timing chain, cam position sensor.
Crank position sensor, engine won't run in most cases.
Feed back from transmission module would throw code.

Vacuum leak? Maybe! This would not throw a code!
Temperature sensor? Maybe!
Fuel related? Maybe!

All done and said several hundred dollars could be saved by a competent technicians diagnosis. However, it is still a crap shoot.

 

[Olddawg]

Well I finally figured out my problem…it was a blocked catalytic converter…only 22,000 miles on it..I started over again and went through my diagnostic list..the only thing that won’t code is fuel and exhaust.I initially put all new fuel with octane booster and new filter..I had also drilled a half inch hole in exhaust to see if it helped..but it didn’t..as anyone knows ford uses substandard bolts and they mostly always break off when you try to remove them..that’s why the hole..also I had a mid sized Plymouth back in the eighties that had a loss of power..I looked at the exhaust and it had a half inch plug on it..I removed it and was able to drive home..so I just crawled my happy ass under the motorhome and saw Alled the cat off.. took it for a drive and problem solved…tells you what crap gas California sells to be blocked at 22,000 miles. Thanks for everyone’s input

 

[offroader09]

We would drill a 1/4 inch hole in front of the cat and another behind the cat then check to see if the exhaust pressure was the same at both locations. The 1/4 inch holes were easy to plug after doing the test. Glad to hear you found the problem. I would not have expected that at 22K miles.

 

[Stuart W]

I actually went through this on my 2016 with V10, if you pull over and restart it would reset
Took it to Ford they never found issue , traded the MH in so not sure what resolved it
Good luck

 

[Stuart W]

A caution, the Cat being plugged is more of symptom:

The inside of a catalytic converter can become contaminated by unburned gasoline — often due to an engine misfire, clogged air filter or bad oxygen sensor — or coolant that has likely leaked into the exhaust through a bad head gasket, or engine oil that has leaked past the piston rings or valve guides and is burned ..
Definitely needs some looking into the “why” it plugged in my opinion

 

[Olddawg]

We used to drill a 1/4 inch hole in front of the cat and another behind the cat then check to see if the exhaust pressure was the same at both locations. The 1/4 inch holes were easy to plug after doing the test. Glad to hear you found the problem. I would not have expected that at 22K miles.

Great idea didn’t think of that