Is it true you really have to change the spark plugs Ford F150
Is it true you really have to change the spark plugs on a 2004 F150, 69K miles? I just paid $415.00 for this mechanical problem I was told I should do as if these sparks plug break off it is twice as expensive to fix the problem...
Re: Is it true you really have to change the spark plugs...
As the tech says, recommended is 100k, but I had to change mine at 83k as the engine was starting to miss (stutter). I did it myself and saved $300 in labor. Stutter disappeared after I changed them out. The two in the back are the toughest.
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Go to almost any auto parts store, and have them run a diagnostics on it. They all do it for free these days. Could need one of the throttle body sensors, ie ~ MAF, AAF, Vacume Idle sensor, etc. Other than that there are the tried and true problems, spark plug electrodes worn completely down, replace plugs. Fuel filter clogged and never been changed. Plugged catalytic convertor.
Before i would adjust idle i would first check the timing. It should idle at or around 750 rpm. Secondly depending on how many miles you have put on the spark plugs i would also consider changing them. Changing spark plugs i a time consuming job. The ladt two plugs neareast the firewall are really hard to get out and when you put the plugs back in use a plug lubricant for the threads.
I woud replace the fluids,including the brake fluid. Be sure to use the correct fluids, follow the FORD specs. Yes the spark plugs are a big issue. Be sure the mechanic knows what he's doing, if not, have the Ford dealer replce them, Special tools are involved because the end of the spark plugs break off in the head and they will need to be removed. Expect to pay BIG BUCKS. This alone is the reason I will never own a Ford Truck.