Ford Truck Enthusiasts Forums

Ford Truck Enthusiasts Forums (https://www.ford-trucks.com/forums/index.php)
-   Excursion - King of SUVs (https://www.ford-trucks.com/forums/forum29/)
-   -   Won't Accelerate (https://www.ford-trucks.com/forums/1315978-wont-accelerate.html)

ssolid 05-21-2014 05:59 PM

Won't Accelerate
 
This has happened now for the 4th time.

Driving along at between 40-50, have been on the road for 20 min to an hour each time and it goes from normal acceleration to struggling to accelerate at all.

Current remedy is to pull over, turn the car off, raise the hood, look at it, close the hood, restart the X and go along my merry way like nothing was the matter.

Each of the other times it was while I was driving but this time was with my daughter and she was not prepared for this situation.

Any thought or suggestions are greatly appreciated.

2001 Limited, 4x4, 7.3, Injen Cold Air Intake, 4" Banks exhaust.

Thank You,
Steve

Stewart_H 05-22-2014 03:04 AM


Originally Posted by ssolid (Post 14368030)
This has happened now for the 4th time.

Driving along at between 40-50, have been on the road for 20 min to an hour each time and it goes from normal acceleration to struggling to accelerate at all.

Possible RFI?

Is this happening in the same place on the road each time? The same geographic spot?

Have you recently changed the ICP, or do you know if it was changed previously?

Stewart

Pitcrw6 05-22-2014 06:09 AM

If you don't know what RFI is, its radio frequency interference or EMI electronic magnetic interference.

Stewart_H 05-22-2014 12:26 PM


Originally Posted by Pitcrw6 (Post 14369239)
If you don't know what RFI is, its radio frequency interference or EMI electronic magnetic interference.

Thanks for the assist.

Sometimes when we do this all day, it's easy to forget a "standard" acronym might not be so standard and understood. :-X22

Stewart

Lance Helmert 05-22-2014 03:29 PM

fuel filter plugged? I don't know if the diesels have catalytic converters, but if they do the cat could be plugging up.

je5 05-22-2014 06:19 PM

Radio frequency interference or electronic magnetic interference from bad ignition coils or alternator affects gas engine ECU's but the alternator or a strong outside source could affect a diesel.

Stewart_H 05-22-2014 06:30 PM


Originally Posted by Lance Helmert (Post 14370845)
fuel filter plugged? I don't know if the diesels have catalytic converters, but if they do the cat could be plugging up.

The 6.0's do, but most 7.3's don't.


Originally Posted by je5 (Post 14371161)
...a strong outside source could affect a diesel.

Yes, RFI has been known to affect aftermarket ICP sensors. Once the aftermarket sensor is swapped out for an OEM Motorcraft sensor, RFI is no longer an issue.

Stewart

Pitcrw6 05-22-2014 08:27 PM


Originally Posted by Stewart_H (Post 14370334)
Thanks for the assist.

Sometimes when we do this all day, it's easy to forget a "standard" acronym might not be so standard and understood. :-X22

Stewart

Not a problem Stewart, I help when I can.:-X22

nsboyd1210 05-25-2014 02:11 AM

I just spent a good amount of time writing up my loss of acceleration stories. And, when I hit the Post Quick Reply button, it sent me to a login page. When I tried to login, it said I was already logged in and of course I lost my writeup. Something should be done to resolve this problem as it is frustrating.

Well into a 1200 mile trip the X started losing the ability to accelerate. Minutes later it would struggle to hold speed and start to run rough while giving it more and more accelerator pedal. I would look for the next exit. At the exit I would shut down for a few minutes, start back up and it would be a new machine. This happened several times and then stopped occurring. We reached our destination and drove around there for a couple weeks with no problems. I couldn't fix something that wasn't broke. So, on the trip back the truck did it again but this time it ground to a halt at the most inopportune time. It was on the interstate where there was construction and there were concrete barriers on both sides of the road. There was no pulling over. I thought we were going to get creamed by the semis barreling up to the stopped vehicle. My family jumped out of the truck and over the barrier. I called 911 but I believed the truck was going to get smashed before anybody could get there. A gracious soul stopped in front of my truck and threw out a strap. For just enough time there was a semi stopped behind our truck. I had that strap hooked up and my family in as fast as we had gotten out. The man towed us to a gas station at the next exit. He would take no money. My next adventure was finding someone to work on the vehicle. It was a Saturday night. Why wouldn't it be right? I actually found someone who was willing to work on it the next morning. That gave me the evening to research the symptoms. It had also, among the other symptoms, thrown 2 or 3 codes. After much reading, I concluded that the camshaft position sensor was PROBABLY the problem. The probably is due to the diversity of the symptoms having been experienced by others when their CPS failed. I shared my thoughts with the mechanic the next morning and he agreed to change the CPS first. $300 later our problem was resolved and we were back on the road.

15,000 miles later and 1 month ago we were on another trip. I started having similar symptoms; no power to accelerate, engine started running rough under load, but no codes and the problem clears up after shutting down for a few minutes. I was determined to nip this in the bud while still running. I changed the CPS in the parking lot of a Carquest. $35 later and back on the highway I realized that was not the fix. I next changed the fuel forwarding pump in the parking lot of a NAPA. $150 later, that was the fix. I guess I can't complain as the pump had 250k miles on it.

These are my loss of acceleration stories. Maybe they can help someone else out there.

By the way, when your fuel filter clogs, you can have similar symptoms. I have experienced that. And, there is a course mesh strainer on your fuel pickup in the tank. I can't imagine this getting clogged unless you are running very dirty fuel. I took my in-tank strainer out as part of a fuel tank mod. I am glad I did.


Nelson
2002 Excursion with the 7.3

ssolid 05-28-2014 03:35 PM

Thanks
 
Nelson, sounds like your situation mirrors mine.

So the Fuel forwarding pump. Where is that located?
I noticed that intermittently there is a leak when I run right under where the fuel filter is when I let it idle to warm up...seemed to be a winter thing.

Wonder if the 2 are connected.

Thanks,
Steve

nsboyd1210 05-28-2014 04:23 PM

Steve,

The fuel forwarding pump is located inside the frame rail below the driver's seat. You will need the Ford fuel line quick disconnect tool that allows you to disconnect the fittings. You can buy them cheap at any auto parts store, like $5. You don't need it to reconnect.

I don't know if the 2 issues you are having are related. I don't think it is a big deal to remove the filter assembly to address the leak. Maybe someone who has done it can chime in there. Concerning the loss of acceleration issue you are having, you are welcome to call me to discuss (eight13-seven48-two969).

Nelson

Pitcrw6 05-28-2014 04:50 PM


Originally Posted by ssolid (Post 14386473)
Nelson, sounds like your situation mirrors mine.

So the Fuel forwarding pump. Where is that located?
I noticed that intermittently there is a leak when I run right under where the fuel filter is when I let it idle to warm up...seemed to be a winter thing.

Wonder if the 2 are connected.

Thanks,
Steve

You never answered the questions in post #2. Answering those questions can save a lot of time in troubleshooting.

ssolid 05-28-2014 05:45 PM


Originally Posted by Stewart_H (Post 14369104)
Possible RFI?

Is this happening in the same place on the road each time? The same geographic spot?

Have you recently changed the ICP, or do you know if it was changed previously?

Stewart

Sorry for not answering these....
Not in the same place or geographic spot....not even after a certain amount of time driving.

I have not changed the ICP...we bought this used with 160k and now have 252k. Not sure if the previous owner(s) changed it.

The only thing the previous owner told me about was that he put in a 203 degree thermostat when he changed out the water pump.

I added an Injen Cold Air Intake and MBRP 4" Exhaust right after we bought it.

Thanks,
Steve

Pitcrw6 05-28-2014 07:54 PM

Thanks for answering those questions. Now do you have a way to check for codes like AE, snapon or the like? Most parts store code readers can't read our trucks.

ssolid 05-28-2014 10:18 PM


Originally Posted by Pitcrw6 (Post 14387046)
Thanks for answering those questions. Now do you have a way to check for codes like AE, snapon or the like? Most parts store code readers can't read our trucks.

I don't, but I think that a buddy of mine might. I will see him tomorrow and ask. He has a Ford truck also.

Will reply back then.

Thanks again,
Steve

ssolid 05-31-2014 03:56 PM

no codes
 
Check engine light is not on and have no way to check for codes besides the auto stores.

Thanks,
Steve

Pitcrw6 06-01-2014 09:34 AM


Originally Posted by ssolid (Post 14386473)
Nelson, sounds like your situation mirrors mine.

So the Fuel forwarding pump. Where is that located?
I noticed that intermittently there is a leak when I run right under where the fuel filter is when I let it idle to warm up...seemed to be a winter thing.

Wonder if the 2 are connected.

Thanks,
Steve

Sounds like your fuel drain valve on the back of the fuel bowl (yellow lever) is leaking. The seals do that when its cold out and when it warms up they expand and seal up. Very easy to change and no its not related to your no acceleration.

You can get them from here.
DieselOrings

And here for the fuel drain valve rebuild page 3
http://www.dieselorings.com/docs/FuelBowlRebuild.pdf

Pitcrw6 06-01-2014 09:38 AM

Well I had a similar problem with mine, no acceleration and it ended up being my fuel pump on the frame rail under the drivers seat. I had no codes either. Also, it could be your intank screens also. How much fuel did you have in the tank each time it happened?

ssolid 08-17-2014 09:14 PM

Just happened again
 

Originally Posted by Pitcrw6 (Post 14396309)
Well I had a similar problem with mine, no acceleration and it ended up being my fuel pump on the frame rail under the drivers seat. I had no codes either. Also, it could be your intank screens also. How much fuel did you have in the tank each time it happened?

Happened back to back today.

About 3/4 of a tank today.
Was running on level ground.
65-70mph after about an hour on the road. Outside temp in 80s.

Will be doing the fuel pump this week or next. Will post results.

ssolid 08-27-2014 09:16 PM

X is now doing the sputtering and loss of power all the time. I have approximately 40 miles to work and after about 30 of it I had to pull over and let it sit for a couple minutes like before. Started back up and worked fine fro 20 seconds. It seemed that when I decelerated it started happening...I had to leave it on the side of the road (2 miles from the office). It had no power and shuddered something terrible.

A buddy took me back a few hours later and we limped it along to the work parking lot.

I see lots of other posts, besides those that commented here, about the CPS. Parts store has one for 25$ so I will replace that tomorrow and my new fuel pump come tomorrow afternoon so it will have to wait for Friday.

I dropped the tank over the weekend. The tank did have some debris. The screen and siphon plug were loose in the bottom and the pickup nozzle at the bottom was accordioned up. The 2 filters were 70% plugged. everything got cleaned and put back as it should.

The tanks was down to 1/8 when the sputtering occurred today.
I drove, and I use that word loosly since it limped along sputtering the whole way, not going over 35 to the nearest gas station 3 miles away.

Tank is now 7/8 full and no change.

I noticed a small fisher in the plastic that holds the filters. Could Air be being sucked through that? If so, would air in the system cause this type of problem?

Why would it run great for 30 miles than crash all the sudden?

Whenever it did this before...I could wait 2 minutes...restart and be on my merry way. Any reason why that would change?

Obviously I am a green, green-horn when it comes to all this. Any suggestions are welcomed.

Thank you all fro your support
ssolid

ssolid 08-28-2014 07:31 PM

Changed out the CPS....had the grey one in. Put a grey one in with a larger sensor head?

replaced with unit from Advanced Auto Parts for $19.
checked the fuel bowl, made sure that the filter still looked clean.

Tried to start her up....rough, quit...rough, quit....did this 15 times....
then it happened....a nice purr

that nice purr kept going for 2 minutes...abruptly quit.
restarted...sputtered a bit...then the purr was back.
I let it idle for 10 minutes. Engine was warm...no hesitations....but it in reverse and it died.

restarted and it hesitated a bit but was running somewhat smooth...went to take it on the road and it stalled again. This time took 20 tries to get it going enough to limp it back into a parking spot 15 feet away.

The Bosch fuel pump arrived today. will put it on in the morning.

A coworker said there was a sensor up near the bowl that caused a problem on his friends 7.3 but he couldn't remember what it was called.

Does anyone know of any sensors that could be related to this issue that are in that area?

Thanks,
Steve

Pitcrw6 08-29-2014 08:46 AM

Get a oem CPS from ford. The ones from the part store are garbage. There only $30 max. The sensor ur friend is talking about is the ICP. You can disconnect it and run ur truck again and see how it runs. By disconnecting it the ICP will go into a default mode.

ssolid 09-04-2014 04:56 PM

Fixed?
 
Ok, so here goes.

New Fuel Filter....No Change
Dropped tank cleaned tank screens....No Change
New CPS....No Change.
New Fuel Pump...No Change
Cleaned ICP...No Change (realize I will need a new one since it had oil in it)

So after no change on any of these things I decided to take off the valve cover on the drivers side to see if I neede to do .25 cents of the .50 cent fix.

In doing so had to undo the large electrical connection attached to the valve cover. It was corroded on several of the pins. Cleaned it and put everything back together.

Purrs like a kitten. I have put about 300 miles on it so far with no hiccups at all.

I have to assume it was the connector.

Thank you all for your input and suggestions.
I will update if something changes.

Pitcrw6 09-04-2014 06:29 PM

Glad you got it fixed. I would have never thought of it being the 42 pin connector.

nsboyd1210 09-04-2014 08:09 PM

Thanks for sharing your struggle and fix which will be helpful for someone else. And, I am happy for your resolution.

Nelson

Nicmike 09-04-2014 09:42 PM

Those darn electrical gremlins....


All times are GMT -5. The time now is 07:31 AM.


© 2024 MH Sub I, LLC dba Internet Brands