2006 5.4 80,000k - Rough idle and losing power at full throttle on 3-2, 2-1 downshift - FordTough.ca - Home of Canadian Ford Truck Enthusiasts
 
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post #1 of 8 (permalink) Old 05-06-2009, 09:10 PM Thread Starter
 
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2006 5.4 80,000k - Rough idle and losing power at full throttle on 3-2, 2-1 downshift

Well as the title states I was having some issues with my truck. I thought it could be the tranny slipping but soon realized that it was the enging misfiring. The truck would drive fine and had lots of torque and cruising power but anytime you "punched it" the truck would pop and fart and not really go anywhere. So after about 4 days I brought it to the dealer and had a mechanic do a test with me and of course it wasn't happening and I only managed to produce the issue just as we pulled into the driveway. The mechanic by feeling the "problem" and listening to the other symptoms I described singled out the sparkplugs. He says that he has seen many trucks in because of the same problems and believes the spark plugs should actually be changed at 80k instead of the 100k they are supposed to last. I also got a new windshield for $200 deductable Picked the truck up today and it now idles smooth and runs excellent, in fact I would say It runs just like new. Moral of the story is if your truck has higher milage and runs like crap then there is a possibilty your plugs are toast.
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post #2 of 8 (permalink) Old 05-07-2009, 01:32 AM
 
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That's great news...What did the plug change run you and did they break any?

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post #3 of 8 (permalink) Old 05-07-2009, 09:12 PM Thread Starter
 
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I had them Check the plugs at 50k and they did anti-sieze thing to them when put back in , so the mechanic said they were a breeze to remove. It was 2 hours labour charge @ $187.70 and 8 plugs @ $14.00ea for a total of $299.70+ taxes.
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post #4 of 8 (permalink) Old 05-07-2009, 11:13 PM
 
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Who did the plugs?

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post #5 of 8 (permalink) Old 05-07-2009, 11:47 PM Thread Starter
 
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Dams Ford in Langley.
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post #6 of 8 (permalink) Old 10-29-2009, 10:04 PM
 
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ahh that sounds like a good plan..mine doesnt seem to be that bad like this but changing the plugs sounds like a good plan.
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post #7 of 8 (permalink) Old 10-30-2009, 09:24 AM
 
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you cant go wrong with a fresh set of plugs.

You tried your best and you failed miserably. The lesson is 'never try'. -Homer Simpson
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post #8 of 8 (permalink) Old 11-01-2009, 10:18 PM
 
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what people don't realize is 100,000km can be deceptive,your truck was 5yrs old (which would be aprox to 100,00km+ under normal driving)i've seen trucks 6yrs old with under 60,000km having this concern(the rule of thumb is a vehicle should put on 20,000km a year under normal driving up to 25,000km in severe conditions)


a moments silence for the shelbyx,i hope her new owner enjoys as much.
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