F150 V8

[bassNspear]

engine light came on last night, and truck was shaken, went to start it this morning, and had to put the foot on the gas to get it to start.

any ideas?

[NETim]

Truck was shaken?

[Jeremy airjer W]

Find out what cylinder was/is missfiring (scan for codes) and check that coil for spark.

[BorderView]

Had these symptoms a few years back on my 2003 F150 w/ 5.4V8. Ran a can of SeaFoam through it. Could feel and hear it getting better as I drove.

Pulled the neg. off the battery to reset and get the "check engine" light to go off. Problem never came back. Light never came back on.

[Scott K]

BNS, you have a missfire, more then likely a coil pack, but injectors were also fairly common in 04-05 f150's.

[spearchucker]

Had these symptoms a few years back on my 2003 F150 w/ 5.4V8. Ran a can of SeaFoam through it. Could feel and hear it getting better as I drove.

Pulled the neg. off the battery to reset and get the "check engine" light to go off. Problem never came back. Light never came back on.

I don't think pulling the battery cable will remove the code from the computer. The only way to remove is with a scan tool. It will stay as history, but be essentially cleared after x number of drive cycles automatically.

[bassNspear]

they replaced the #5 injector a year ago. Its running good now, not sure what happened.

Seefoam might be the way to go!

[vister]

Quote:

I don't think pulling the battery cable will remove the code from the computer. The only way to remove is with a scan tool. It will stay as history, but be essentially cleared after x number of drive cycles automatically.

im not a mechanic, but i can fix things. ive always taken the possitive cable off the battery and touched it to something that would be a ground. this i think clears the computer memory of a trouble code. disconnecting the negative usually just turns the check engine light off until it senses a problem again.

but, im probably wrong!!

[311Hemi]

Find out what cylinder was/is missfiring (scan for codes) and check that coil for spark.

This would be my guess as well.

[Scott K]

Vister, I wouldnt do that on newer vehicles. You wouldnt believe how many calls I get because they did this and now the instrument cluster doesnt work, or a lighting control module. Some of these modules dont like any sort of voltage spike at all.

[Big Buck Buster]

Some of the foreign vehicles call for what Vister was talking about.

[Jeremy airjer W]

Some of the foreign vehicles call for what Vister was talking about.

?????

[Big Buck Buster]

?????

I have had to take the neg. cable and touch the poss. cable when the neg. was disconnected on a foreign car(don't remember what model). This was what alldata said to do in the procedure for clearing memory. I have not seen it in newer model years though.