Why does my F-150 shake when I start it?

Faulty or dirty plugs: If the spark plugs are dirty or worn, it may cause misfires which leads to shaking in the engine. New spark plugs will need to be installed. Exhaust: If the muffler or exhaust system is damaged, or has a leak, there will be an increased vibration and shaking while idling.

What to do about intermittent idle on a 1990 Ford F150?

I installed a spacer kit under the speed control as per old Ford bulletin, checked fuel pressure (50psi) and cleaned injectors. I have read lots of forums and found people with this exact problem (on Fords) but no answers on what fixes it. The fact that it is intermittent and shows no codes is killing me. have the same problem?

What should idle temp be on Ford F150?

You may have to unplug the sensor and check them with an ohm meter but the scanner should be able to give you the engine temp at time of test. As for the idle air control valve it is with in specs it should be 10 ohms or more. Let me know what you find with the coolant and air charge temp sensors and we will go from there. helpful?

What kind of engine does a 1990 Ford F150 have?

1990 Ford F150 XLT Lariat 351 V8 5.8L engine starting/idling rough and backfires when given acceleration. Hesitates and loss of power while driving. Bought truck with 200K miles and now has 210K miles.

Is the idle air control spacer off in a 1990 Ford F150?

The idle air control spacer is off now but when it was on it did idle the same, I did mess with the adjustment but it did not help the problem it only raised or lowered the idle. helpful? Ok the code 44 is part of the smog system however it is not related to your problem. Sense you have a scanner then you can check out sensors live right?

How long does a 1991 Ford F150 run?

It either shuts off or keeps idling up an … read more 1991 Ford F150. 5.8 351. When started it idles up and down for about 45 seconds. Then idles fine for about 10 seconds, then dies. It does this like clockwork every time.

What’s the problem with my 1995 Ford F150?

1995 ford f150- i have a problem with my truck idling rough. when i krank it it idles just fine but then when it starts to idle down it idles between 0 and 1. It either shuts off or keeps idling up an … read more

Why is my Ford F-150 engine not working?

For the record, Ford is the object of a Class Action Suit on these engines. However, there are some cures. If you go to your local Auto Store, a check for Codes will most likely find Oxygen Sensor failure-all 4 of them- and it will be accompanied by a loud clicking coming from the engine, as a result of the defective timing chain destroying itself.

Why does my F-150 shake when I start it?