Hard shift, lugging, fuel?

DSPEAK

MEMBER
2010 FORD F-150
4.6L
V8
2WD
AUTOMATIC
220,000 MILES

This morning I started my truck. The check engine light was on. I checked the codes, wishing I had written them down. Had something like evap, and then another about manufacturer something. Sorry, I will get codes next time and write them down. Anyway, I cleared codes, truck ran fine, drove it about 20 miles. Pulled over to pick up work buddy, never turned engine off. He gets in, we take off, drive about 3 miles and the truck feels like it is running out of gas, or something is restricting fuel. Did it twice then stopped. Drove another 5 miles or so with no more issues. Any ideas guys, this is my primary mode of transportation.

4 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,490 POSTS

This sounds like the crankshaft angle sensor, or the fuel pump is going out. Also, I have seen the MAF sensor short out intermittently. When the engine starts to act up unplug the sensor to see if they change anything. The codes are needed to see what's going on. Here is the location of the sensor. Also, the MAF sensor will make the transmission shift hard as well. Check out the images below for the location.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

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Monday, January 23rd, 2023 AT 10:43 AM

DSPEAK

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3 POSTS

Thank you for the reply. After further driving, still haven't got another code thrown, I read where it could be something with the evap system. I just drove up a steep hill and it had no problems. Before the hill, I was driving on a straight level road and as it went into overdrive it momentarily felt like the same shudder, but with traffic I had to slow back down. Could it be something with the evap system, I know it has been throwing codes for that and be related to the overdrive?

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Monday, January 23rd, 2023 AT 11:31 AM

DSPEAK

MEMBER
3 POSTS

I am now suspecting a coil pack misfire at low-speed low RPM.

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Monday, January 23rd, 2023 AT 2:22 PM

KEN L

MASTER CERTIFIED MECHANIC
47,490 POSTS

Yes, misfires can cause the issue as well. I would change out the spark plugs and coils which are common on these engines for misfires which should be done as regular maintenance.

This video should help with instructions in the images below:

https://youtu.be/e68QXyBAiZo

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