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Old 07-23-2013, 12:44 PM   #1
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Lost power !

Hey guys I was turning a corner in my 2004 Mustang and I don't know if the corner had anything to do with it or if it was coincidence but I lost power I believe, I push Accelerator and nothing was happening at the engine didn't rev like the tranny slipped. Any idea's, I checked tranny fluid and its fine and I had a quarter tank of gas.
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Old 07-23-2013, 12:49 PM   #2
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Did the car cut off?
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Old 07-23-2013, 12:59 PM   #3
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Did the car cut off?
It was over before I figured out what happen but I push the accelerator to go and didn't hear the engine rev and it wouldn't go, then it picked up and accelerated sluggish at first.
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Old 07-23-2013, 01:00 PM   #4
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Could it be the Maf sensor thing? My 02 f150 acted like that. We were driving giving it has and the pedal was down but the truck didnt move and after a minute or two it would. It was a pita. He unplugged the Maf sensor and it works just fine lol
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Old 07-23-2013, 01:02 PM   #5
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Get your alternator checked! Had any other problems? Dead battery? Trouble starting?
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Old 07-23-2013, 01:06 PM   #6
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Get your alternator checked! Had any other problems? Dead battery? Trouble starting?
No problems starting or with battery.

---------- Post added at 01:06 PM ---------- Previous post was at 01:03 PM ----------

I have noticed lately that she seems a little sluggish on the low end of acceleration, don't know if that is part of this problem. She just went around the corner and nothin for a good 5 or so sec.
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Old 07-23-2013, 01:15 PM   #7
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Make sure the battery isn't moving.
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Old 07-23-2013, 01:18 PM   #8
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Make sure the battery isn't moving.
Ok
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Old 07-23-2013, 01:29 PM   #9
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Ok
Nope battery is good.
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Old 07-23-2013, 01:48 PM   #10
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Felt any jumps or hesitations??
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Old 07-23-2013, 02:05 PM   #11
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Felt any jumps or hesitations??
Well lately I've notice she don't have the quick acceleration she had before, don't know if that was a warning of this current problem, but no jumping though.
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Old 07-23-2013, 04:46 PM   #12
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When it lost the power, you pressed on the accelerator. Did the rpms go up? Head over to autozone or another autoparts place and have them check your alternator. Its free
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Old 07-23-2013, 05:28 PM   #13
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When it lost the power, you pressed on the accelerator. Did the rpms go up? Head over to autozone or another autoparts place and have them check your alternator. Its free
No the engine didn't rev to be honest I didn't get a chance to look at the tack, by the time I realized something was wrong and I wasn't getting any acceleration from the gas pedal. she started to accelerate. It was 5 or so sec.
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Old 07-23-2013, 08:16 PM   #14
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Well I took her out for a ride and tried to duplicate what I did and just drove around, she didn't stumble at all. I don't know I'm sure that was a warning of some kind.
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Old 07-23-2013, 08:24 PM   #15
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Hello LuvStangs. Is your 04 an automatic or Manuel?
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Old 07-23-2013, 08:25 PM   #16
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Hello LuvStangs. Is your 04 an automatic or Manuel?
Automatic
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Old 07-23-2013, 08:27 PM   #17
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If it's an automatic, it probably the first signs that your transmission is slipping depending on the mileage of the vehicle. I had an 2004 40th year addition which did the same thing while turning. I ended up rebuilding the transmission and back to 100%

If it's Manuel, it could be the gear shifters. I helped my friend with his 95 GT which was having trouble accelarating as well as it didn't have much power. Once we changed the shifters, the car takes off and is back the way it was when he bought it. Hope this helps
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Old 07-23-2013, 08:30 PM   #18
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Oh that's not good, she's got 140K on her
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Old 07-23-2013, 08:31 PM   #19
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Since it's an automatic, you need to change the transmission filter every 30,000 miles. If you haven't, then it is possible that the build-up has started making your transmission slip. I recommend servicing the transmission (New filter/fluid flush) to see if you find any metal particles in the oil. If heavy particles, then your transmission is going bad. If few/no particles, then servicing it should have taken care of the problem.
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Old 07-23-2013, 08:33 PM   #20
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Ok, appreciate you taking the time to talk with me, I'll do that and check it out.
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Old 07-23-2013, 08:39 PM   #21
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Ok, here is another question, just to help eliminate some other possible issues.
When your car lost power, you stated the engine did not rev?? In the answer I gave you earlier, the engine would rev, but little to no accelaration. Also, if a battery connection came loose like the others mentioned above, the car would have cut off (entire power) and when it came back on, you would have had to put the car in nutrual or park and restarted it.

---------- Post added at 06:39 PM ---------- Previous post was at 06:37 PM ----------

Did you have to restart the car, or did it just kick back in 5 seconds like you said?
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Old 07-23-2013, 08:46 PM   #22
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LuvStangs,

Also check to see if the accelarator wire is loose. This can cause your condition as well. By tightening it up, you should be back to normal. That is if you were driving, car wouldn't rev, but maintained all electrical power, then accelarated again. This is the most common issue if the above situation happened. Hope this helps. Let me know if you need anything else.
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Old 07-23-2013, 08:46 PM   #23
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it could be te lag out cars are known for with the tb
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Old 07-23-2013, 08:51 PM   #24
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Came around the corner and I tried to acc. And the car did nothing, I let off and looked at the dash at the same time I was looking at the dash I push the accelerator down again and she picked up again. This happen very quick 3-5 sec and I heard nothing the first time I pushed the acc. No revs no sound what so ever, like I shut the key off.
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Old 07-23-2013, 08:54 PM   #25
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then it's the lag on auto when u step in it sometimes it hold the bursts the speed sometimes when u do it n let of it does nothing
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Old 07-23-2013, 09:00 PM   #26
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Well I appreciate all the help I'm gonna go thru her and change the tranny fluid and check all the electrical, plug wires ect. She's usually pretty responsive especially after the gas pedal mod. All I have on her so far is a CAI. I'll get some cleaner for the MAF To. I'll let ya know what I find if anything. Maybe it'll help someone else.
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Old 07-23-2013, 09:05 PM   #27
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i would get it serviced regardless just to keep up matinees but i it happened again afterward it could be something bad
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Old 07-25-2013, 01:22 AM   #28
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Like what exactly is it doing? I know mustangs and f150s are different totally but what mine would do is like this. It'd be driving perfect and than all of a sudden the revs go down and the car slows down with the pedal still pressed. It's done this countless of times. It even did it when crossing the highway! I had mechanic look and be said it was a vacuum leak. So after he fixed it he took it for a test drive and it ran perfect. As we were leaving my gt drove it home it started up again. So we take it back I get in it with mechanic and he had it going 90 mph and it didnt hesitate and the gas pedal worked fine. We got back she took over the wheel and it happened again. So we took back he looked at it and he unplugged the maf sensor I believe and it ran perfect. It fixed it. Is it only happening to you at a certain speed?
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Old 07-25-2013, 12:35 PM   #29
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If you feel lack of power try changing out the ignition before rebuilding the transmission. Usually changing the coil pack helps a lot if it never has been replaced before
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Old 07-25-2013, 12:59 PM   #30
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You'll feel a difference when you transmission fluids change. Got my dads 98 z72 fluids changed out and felt like a new vehicle.
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Old 07-25-2013, 01:34 PM   #31
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I wouldn't suggest it... But it's all u, If the tranny oil wasn't changed on its routine schedule every 30,000 there could be a problem as ur clutch ages it starts to wear like normal n with out that oil the clutch would give out on u because ur clutch is like sand paper as those particles start to fall n u change ur oil those particles that where part of ur clutch won't be there n it will cause more slipping of ur tranny. B cuz there not there i would just top off. That's my experience with cars n working for valvoline...
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Old 07-25-2013, 02:24 PM   #32
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I wouldn't suggest it... But it's all u, If the tranny oil wasn't changed on its routine schedule every 30,000 there could be a problem as ur clutch ages it starts to wear like normal n with out that oil the clutch would give out on u because ur clutch is like sand paper as those particles start to fall n u change ur oil those particles that where part of ur clutch won't be there n it will cause more slipping of ur tranny. B cuz there not there i would just top off. That's my experience with cars n working for valvoline...
Agreed, never flush if it hasn't been maintained since new.
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Old 07-25-2013, 05:53 PM   #33
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what could u do to be able to fix it
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Old 07-25-2013, 06:54 PM   #34
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Either taking the risk of changing the fluid or a rebuilt or a new tranny... Would be some options...
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Old 07-25-2013, 08:45 PM   #35
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You can top it off, or get it rebuilt. Or risk a system flush.
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