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Old 12-14-2014, 08:39 PM   #1
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Sudden power loss

I have a 02 model with a little over 180k miles. Sometimes when I've only driven a few miles I have a loss of power and then things seem to act normal once the engine is warmed up more. Also, at times the car will die at idle. The engine will restart but it does take a few minuets. I'm guessing it's either the TPS or something wrong wit the fuel system.
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Old 12-15-2014, 04:31 PM   #2
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Make sure that your charging system is working correctly and the engine is properly tuned up. Also, check that the Throttle Body and Mass Air Flow sensor are both clean.
Have you checked for any pending, stored trouble codes?
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Old 12-16-2014, 07:54 PM   #3
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Everything electrical seems to be fine. Even during the hiccups all the lights and radio will keep working. The check engine light has not came on. Cleaned the throttle body, the MAF, and replaced the TPS. Ran fine for a while but it had trouble starting again. Someone else I talked to seems to think it's the fuel pump.
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Old 12-17-2014, 08:48 PM   #4
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When the power is too low just spray and pray baby. N2o
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Old 12-17-2014, 09:55 PM   #5
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Quote:
Originally Posted by Mustangfan2003 View Post
Everything electrical seems to be fine. Even during the hiccups all the lights and radio will keep working. The check engine light has not came on. Cleaned the throttle body, the MAF, and replaced the TPS. Ran fine for a while but it had trouble starting again. Someone else I talked to seems to think it's the fuel pump.
Just because the check engine light hasn't come on, doesn't necessarily mean that there isn't a stored code. And even though your car starts and all of the lights and radio and everything is working, your charging system could still be weak and causing driveability problems.
It's best to check the easiest things first.
Have the charging system checked and also scan for any stored codes. Unless you live in CA, any auto parts store can do those two things for you.
If you suspect the fuel system, change your fuel filter and then do a pressure test to determine the health of the fuel pump. It may, actually, be as simple as a clogged fuel filter.
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Old 12-18-2014, 11:34 AM   #6
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Changed out the fuel filter already and it still died. I've got a guy looking at it now and seeing where to go from there.
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Old 12-18-2014, 11:37 AM   #7
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Keep us posted on what you find!
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Old 12-18-2014, 12:10 PM   #8
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with a scan tool that shows live data and tells you the fuel pressure reading by the ecu, could that be something to look at, for drops in fuel pressure and such?
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Old 12-18-2014, 05:16 PM   #9
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Check the coils...Maybe one is not working...It happen to me last year...Lost power because i was running 7 cylinder instead of 8.


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Old 12-18-2014, 05:33 PM   #10
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mine was a combination of plugged up cats and fuel filter after that no prob
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Old 12-22-2014, 07:53 PM   #11
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Turns out it was the fuel pump.
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Old 12-27-2014, 12:29 PM   #12
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Well the car was running great but wen I was about to leave my family dinner on Christmas the car wouldn't start again. The plug to my ECM had corrosion on it. Tried to clean that up but it didn't work and now I'm replacing the ECM.
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Old 12-31-2014, 10:58 AM   #13
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One thing to remember on your check engine lights and any other lights. Crappy people and shady dealers cut the wires or get the lights to not come on somehow when you turn the key to accessory every warning/ dash light should come on for a few seconds and that is every vehicle not just mustangs/ fords. I do that with every purchase at my dealership unfortunately some people don't know about it. Also if the light isn't on doesn't mean there isn't trouble
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Old 12-31-2014, 01:25 PM   #14
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I've had the car since 2004 and the light has came on before. Even after my last service it was on back over the summer. I pick the car up New Years Day and we will see what happens.
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Old 12-31-2014, 02:06 PM   #15
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Could it possibly be a loose battery cable? My civic had that problem and I didn't think to check it. But when I'd give it a good kick to the bumper it would work. Then I found a loose negative battery terminal. It made just enough contact most of the time to turn the car over. But some other times it wouldn't do anything.
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Old 12-31-2014, 03:12 PM   #16
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Cables seem fine and only does it when it's cold.
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Old 12-31-2014, 03:54 PM   #17
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I have read of people having similar issues and it turned out to be the fuel rail pressure sensor. It may be something to check into.
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Old 01-02-2015, 10:46 AM   #18
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Well after changing out the ECM and going ahead and putting on a new crank sensor it seems to be running fine.
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