Question about Ford F-150

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2000 ford lightning svt would a bad coil pack cause my truck to cut out at high rpm ????

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  • jessethewren Jul 07, 2010

    thanks man i appreciate you...

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Your computer controls top speed and rpm's so you don't go past rated rpm range and blow the engine. It's a good thing, as I've thrown rods out the side of blocks, and broken cranks, due to serious over-revving. Could also be a fuel starvation issue, if it's associated with a complete power loss at various high rpm's, (power comes back after you let off it for a second or two). But, what you're describing sounds like the ignition limiter cutting spark every other firing, which happens at the same approximate rpm, (6500-7000), to control rpm limit.

Posted on Jul 03, 2010

  • jessethewren Jul 03, 2010

    Im not talking race rpm im talking about 3000 to 4000 rpm so what do you sugest ? I have a new fuel pump and intake gasket maf and egr so could it be a coil pack

  • INDIRA KUMAR
    INDIRA KUMAR Jul 03, 2010

    Yes it must be an coil pack.

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Hey there. I'm not an expert on Ford's, but I had a very similar issue with my Mercedes S550 AMG. I'm hoping my experience will help you. What caused this issue on my car was two things. There was an oil leak running down a wire harness that caused the cam-shaft positioning sensor to mis-read engine data, that caused another sensor (that was trying to correct the problem internally) to go bad. That sensor was the Crank-shaft positioning sensor. This drove me nuts... I replaced the plugs, coil packs, plug wires and a few other smaller things until I gave up. Towed it to the "
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Getting real bad fuel economy and rpm doesnt seem right as it shifts and gains speed


please have your ignition coil pack checked. the coils go bad often on ford cars/trucks. if thats ok, then have your catalytic converter also checked. if its clogged, then it will cause the symptoms you describe.

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2000 ford explorer Have a p0305 code started a while back when accelerating to pass a car the truck would **** and the check engine light would blink but once i take foot of the gas it would go back to...


A PO305 code is for a Cylinder #5 misfire code. This would definitely cause a lack of power when passing and would cause the check engine light to blink when you are into the throttle and then stop once you let off the throttle. This could be caused by a faulty coil pack or a bad spark plug for that cylinder. I dont know which engine you have in this vehicle, but if each spark plug has its own coil, you can try unplugging the coil pack for cylinder # 5 while the vehicle is running and if it changes the way it runs then the coil pack is probably good, but if there is no change when you unplug the electrical connector, there is a good chance the coil pack is bad. It is not unusual for these coil packs to burn out.

Hope this helps... if there is anything further i can help you with, please feel free to ask.

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Check all conections to the coil pack, check to insure all spark plug wires are on, and make sure it is getting fire. With the engine not starting, the check engine light may not come on to produce a code for the diagnostics.

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Your ignition is what supplys your spark pluggs with electricity in order to creat combustion in your engine. Most older cars have distributers, if you drive a focus with a zetec it will have a coil pack. I have a 2002 Focus SVT that I upgraded the ignition system to a full racing system for around $200. What you need to change is the coil pack, spark pluggs and spark plugg wires. You only have to remove about four bolts on the coil pack and it just pulls out.

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If this is a coil pack ignition system (no spark plug wires, just a coil pack on each plug), this sounds like you may have a coil pack that is going bad. Do you have a check engine light on? You might also think about having someone take a look at your fuel injectors, if one or more isn't firing this will cause a miss that will sometimes seem like a faulty spark plug. Hope this helps.

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