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Old 11-29-2009, 09:09 PM   #1
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V6 Loss of horse power

Hello everyone,

I just bought a 2000 mustang V6 3.8L a little of a month ago, i havent had any real problems with it until now, for some reason when i got in the car today, it felt different when i was driving, it feels like the car has lost some horse power, the car takes longer to get up. It feels like the car will choke out on pull-off and reversing. I havent had this problem until today. I took the car by Advance auto and when looking under the hood, when the car gets to 4000 RPM, the motor jumps, he said it is a spark plug miss firing. Could that be the cause of the loss of horse power? could it be the clutch? If someone could please help, it would be greatly appreciated. Thank you.
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Old 11-30-2009, 01:36 AM   #2
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Re: V6 Loss of horse power

Is your car throwing any codes or check engine lights? If there was a miss fire you should get the engine light. I would think if it's the clutch you'd only feel it when shifting.
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Old 11-30-2009, 08:11 AM   #3
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Re: V6 Loss of horse power

I had the same problem a few days ago, misfiring while accelerating. Turned out to be my coil pack had crapped out and wasn't throwing any codes or anything. See if that could be it.
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Old 11-30-2009, 08:27 AM   #4
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Re: V6 Loss of horse power

I had a coil pack go bad on my DD car (99 grand prix) and it kinda did the same sort of thing as you are describing.
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Old 11-30-2009, 02:13 PM   #5
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Re: V6 Loss of horse power

I'll have it checked out, should i ask about coil pack? how much does it cost to fix it or replace it?

Thank you for your replies.
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Old 11-30-2009, 02:30 PM   #6
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Re: V6 Loss of horse power

If you replace it yourself, you can buy one from AM for about $100. Its pretty straight forward for the install. Having it done by a shop will run you probably around $250 or so depending on the shop.
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Old 12-07-2009, 09:22 PM   #7
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Re: V6 Loss of horse power

sceamin demon coil pack costs $89.99 form v6mustangstuff.com
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Old 12-08-2009, 08:16 AM   #8
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Re: V6 Loss of horse power

if its a coil pack you will know it, if you are missing spark the car will run really bad
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Old 12-10-2009, 05:48 AM   #9
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Re: V6 Loss of horse power

just get new plugs and wires and if you want a lil more pick up get the expensive one, i bought the ones that were $20 a pc for my 3000gt and i got new wires and everything and man it jumped up and went, it was like a new car off the lot, anyway last resort then do that, mine was actually missing firing yesterday cause someone had crossed spark plugs in my coil pack. good luck man
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Old 12-11-2009, 09:43 AM   #10
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Re: V6 Loss of horse power

Spark plugs maybe? Im thinkin of the alternator as well...
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Old 12-30-2009, 08:32 AM   #11
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Re: V6 Loss of horse power

It might just be the fuel filter. Silly as it may sound. I had a problem similar this summer, no engine codes loss of power, real sluggish. Popped in a new filter, boing gone!! no problems since. Try that before you blow to much money.
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Old 01-06-2010, 02:34 PM   #12
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Re: V6 Loss of horse power

If you got the car from someone that has put a tuner on it, and did it themselves and had no idea what they were doing, that can have an effect as well. Mine is doing the same thing, but its an auto. It takes a while for it to reach a gear when I slam on the gas. Or sometimes it'll be really sluggish when im leavin from a stop light or something.
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Old 01-09-2010, 01:33 AM   #13
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Re: V6 Loss of horse power

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It might just be the fuel filter. Silly as it may sound. I had a problem similar this summer, no engine codes loss of power, real sluggish. Popped in a new filter, boing gone!! no problems since. Try that before you blow to much money.
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Old 01-09-2010, 05:47 AM   #14
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Re: V6 Loss of horse power

i hate when that happens
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Old 01-22-2010, 11:15 AM   #15
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Re: V6 Loss of horse power

Doesn't always throw codes or show check engine light. my car was doing the same a few months ago. changed fuel filter first, and it didn't fix my problem. somehow 2 of my plug wires had fallen near the exhaust and was rubbing there fore making a hole through my wire. The shop i went to wanted to put a new coil pack, but luckily i saw the wires before i paid them to do it.

Oh, and something that might be interesting to know, they put the computer on my car and it was misfiring on cylinder 3 i believe. i got the bad wire out and replaced it. drove my car and it was worse. had to put the computer back on it again only to find out that it was misfiring on cylinder 2 as well. it didn't show both at the same time.

good luck!
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Old 01-22-2010, 10:15 PM   #16
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Re: V6 Loss of horse power

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Doesn't always throw codes or show check engine light. my car was doing the same a few months ago. changed fuel filter first, and it didn't fix my problem. somehow 2 of my plug wires had fallen near the exhaust and was rubbing there fore making a hole through my wire. The shop i went to wanted to put a new coil pack, but luckily i saw the wires before i paid them to do it.

Oh, and something that might be interesting to know, they put the computer on my car and it was misfiring on cylinder 3 i believe. i got the bad wire out and replaced it. drove my car and it was worse. had to put the computer back on it again only to find out that it was misfiring on cylinder 2 as well. it didn't show both at the same time.

good luck!
wow i didnt know it read it one at a time like that,thats good to know
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Old 01-25-2010, 02:09 PM   #17
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Re: V6 Loss of horse power

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wow i didnt know it read it one at a time like that,thats good to know
yea, i was surprised myself! and so was the technician. could've been a computer malfunction with their equipment?? not sure, but it wasn't fun making two trips with them trying to convince me to pay them to change the coil pack...
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Old 01-25-2010, 03:10 PM   #18
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Re: V6 Loss of horse power

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Spark plugs maybe? Im thinkin of the alternator as well...
Can't imagine that it's an alternator problem. Even if the alternator was going the battery would pick up the slack until it went dead, and he didn't mention any starting problems.
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Old 01-25-2010, 03:13 PM   #19
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Re: V6 Loss of horse power

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yea, i was surprised myself! and so was the technician. could've been a computer malfunction with their equipment?? not sure, but it wasn't fun making two trips with them trying to convince me to pay them to change the coil pack...
Sometimes if the misfire is bad enough, I'll show a code for a misfire on the next cylinder in the firing sequence. The only way it figures out which is misfiring is by watching the rotational speed of the crankshaft with the crank sensor and watching for a slowdown. If the crank slows down when #3 is supposed to be firing, then it figures that #3 is the one that is bad.

It's usually right, but not always.
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Old 01-27-2010, 09:29 AM   #20
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Re: V6 Loss of horse power

Sounds like a fuel filter. But as other have suggested change wires,plugs,clean the MAF and check your air filter Run seafoam thru the top end and put 1/2 can in the fuel system It a used stang and unless you know exactly what type of maintance the previous owner did I'd do all of the above

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