Misfire

JAMES AUSTIN

MEMBER
1999 FORD F-250
6.8L
V10
4WD
AUTOMATIC
165,000 MILES

Truck is missing just started. No hard codes. Code p0300 is pending though. Thinking fuel pump it was replaced five years ago.

Monday, January 8th, 2018 AT 4:33 PM

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,651 POSTS

Hello,

I would start by doing the spark plugs there is a specific way they must be done. Use this guide to help you see what you are in for when doing the job.

https://www.2carpros.com/articles/how-to-change-spark-plugs

Then clear the codes and you should be all set.

https://www.2carpros.com/articles/check-engine-light-clear-codes

Please let us know what happens.

Cheers, Ken

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Tuesday, January 9th, 2018 AT 5:52 PM

JAMES AUSTIN

MEMBER
2 POSTS

Spark plugs are fairly new and problem is intermittent did not act up at all this afternoon

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Tuesday, January 9th, 2018 AT 7:19 PM

KEN L

MASTER CERTIFIED MECHANIC
47,651 POSTS

The pending P0300 code it telling you there is a misfire but the system has not figured out which cylinder it is yet. You might just drive it until it gets worse and then run the codes again to see which cylinder it is. I sounds like an ignition coil is starting to go out which is common on these trucks.

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Wednesday, January 10th, 2018 AT 11:37 AM