Rough ride when accelerating!

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Mar 8, 2005 | 05:45 PM

MrTrick

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Rough ride when accelerating!

I have a 2000 F150, 5.4, that runs as if it is need of a major tuneup! It idles smoothly a little above the 1 on the tach; however, drives very rough. When I accelerate, the truck feels like it is going to vibrate apart. If I punch it, the ride smoothes out! I replaced the fuel filter and the check engine light has come on constantly. Any help would be greatly appreciated!

MrTrick

Mar 8, 2005 | 05:57 PM

f-150 hot rod

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How many miles are on your truck? If you are close to 100,000 miles it is time for new plugs. If not, you may have a cop (coil on plug) going bad. Is the check engine light on solid or does it flash when it is vibrating? I recommend taking it to get scanned.

Mar 8, 2005 | 06:08 PM

triton_2002

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From: South Texas

Autozone will pull the code(s) for free. Write them down and post them here, someone will point you in the right direction.

Mar 9, 2005 | 01:37 AM

MrTrick

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I appreciate that! I'll get it done tomorrow! The truck has 128,000 miles on it!

MrTrick

Mar 9, 2005 | 09:18 AM

MrTrick

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And AutoZone says, multiple cylinder misfire. 1 & 2 Codes P0300 & P0301! Any help is appreciated! Thanks!

MrTrick

Mar 9, 2005 | 04:41 PM

triton_2002

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Quote:

Originally Posted by MrTrick

I appreciate that! I'll get it done tomorrow! The truck has 128,000 miles on it!

MrTrick

Have the spark plugs been changed? It could be dirty injector(s).

Mar 9, 2005 | 04:49 PM

code_red

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Spark plugs, spark plug wire, and then cop would be my 1st starting point

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Mar 9, 2005 | 09:09 PM

MrTrick

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Ready to get started!

I plan to start with the spark plugs tomorrow! If the injectors are dirty, how do I clean them? Thanks for your help and I will be typing for more assistance!

Thanks

MrTrick

Mar 11, 2005 | 03:27 PM

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MrTrick

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Recap

It's done! Switched #1 & #2 COPs with #7 & #8 and changed spark plugs. She rans great, right, for a little while. Misfiring between 50 and 70 mph. Drove for 65 miles and could not get it tested (no CEL). Finally, got the light and Auto Zone says "P0307" is where my problem lies. Replaced the #7 COP and she is running great again with no misfiring, yet!

Tomorrow is another day!

Thanks for the suggestions and information!

MrTrick