Question about 1988 Ford F 150

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1988 six have to burn premium gas to lessen engine rattle

If I use regular gas, the engine rattles under load. New plugs, dis. cap ect. Just started and getting worse. Sounds like valves or rods on cheap gas. Please help. Love my truck!

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I'd be replacing the "knock sensor". It sends signal back to computer to adjust timing when this type of condition occurs. It should be on drivers side of lower engine, below ignition coil, mounted to the block. Here's alink to picture so you can I.D it. Let me know. thanks.,knock%20sensor/shopping/allResults.htm

Posted on Feb 25, 2009

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Burn that premium and good luck!! :)

Posted on Feb 25, 2009


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Premium or regular gas

Fuel comes in different grades due to octane levels, the higher grade the higher octane, the higher price. If you have the owners manual or window sticker, you would see that the car was probably made to run on 87 octane (regular unleaded), I have been through the different octane levels for more than 30 years and I have decided that the cheapest runs as well as the most expensive. The higher octane will sometimes cause an engine to ping or rattle under acceleration, if this happens to yours go back to the cheap stuff and everything will be fine. That is my opinion, others may differ, but I run my BMW on the cheapest I can find and I still get 31 MPG hwy.

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What kind of gas? Regular or Premuim?

Regular is fine. I have a 626 as well with manual and it says regular.

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