2000 v6 mustang engine problems

Mr.James · December 17th, 2009, 10:48 PM

so my auto 2000 v6 mustang has been beat up by the previous owner (the idiot) and has about 120,000 miles on it..well every now and then it will suddenly downshift, i lose all power, exhaust noise is nonexistant, and i have to floor it to go from 0-15 and it takes forever, and it shakes ALOT. its happened 4 times, everytime i just turn the car off and start her back up and it goes away, well tonight it did it to me twice in a row and after the 2nd time my Service engine soon light came on
my dad thinks something with the electronics is screwed up. could it just be my ecu going bad or am i facing a more serious problem? i plan on taking it to Advanced auto parts tomorrow and having them check the error codes bc i heard they do it for free...any other suggestions?

RFM 40th V6 · December 17th, 2009, 11:33 PM

At this point the best thing to do is get the codes checked. Let us know what the codes read out to be and we should be able to steer you in the right direction. Best of luck.

xn1919 · December 19th, 2009, 07:56 PM

get a new one

WLJohnson05 · December 19th, 2009, 08:26 PM

Originally Posted by xn1919

get a new one

if you arent going to be helpful dont post.

rfcsoulja · December 20th, 2009, 03:06 AM

Have you given it a tune up (plugs, wires, and coil possible)?

stephen · December 20th, 2009, 08:27 AM

Before guessing it would be good to read out the code from the OBD II system.

Mr.James · December 20th, 2009, 06:54 PM

i talked to a mechanic friend of mine and he thinks that one of my O2 sensors is shot..could this be the culprit?

RFM 40th V6 · December 21st, 2009, 12:43 AM

A bad 02 sensor doesn't usually cause a problem like the one you described.

I would think a TPS sensor, or something with the transmission.

But it's best to get the codes pulled.

mcqueen · December 21st, 2009, 12:47 AM

Originally Posted by RFM 40th V6

A bad 02 sensor doesn't usually cause a problem like the one you described.

+1 I have a bad O2 sensor and about all it's doing is killing my gas mileage.

Mr.James · December 21st, 2009, 04:56 PM

Originally Posted by RFM 40th V6

A bad 02 sensor doesn't usually cause a problem like the one you described.

I would think a TPS sensor, or something with the transmission.

But it's best to get the codes pulled.

why would something with my transmission kill half my cylinders and make it idle rough?

stephen · December 21st, 2009, 11:42 PM

If it's the O2 sensor, I don't see why the transmission would downshift when the problem happens. The O2 sensor should give an OBD II code. If the engine has more than 100K miles, the O2 sensors should be replaced anyway, so you might try replacing them.

Mr.James · December 22nd, 2009, 06:33 PM

Originally Posted by stephen

If it's the O2 sensor, I don't see why the transmission would downshift when the problem happens. The O2 sensor should give an OBD II code. If the engine has more than 100K miles, the O2 sensors should be replaced anyway, so you might try replacing them.

just got it back from the ford dealer
it was the starter coil, it was loose/going bad
they tighten it up and im going to get it replaced soon

RFM 40th V6 · December 22nd, 2009, 08:16 PM

Originally Posted by Mr.James

why would something with my transmission kill half my cylinders and make it idle rough?

I was putting that in there because you said it would downshift randomly. I didn't mean for it to sound like the sole problem.

Mr.James · December 30th, 2009, 08:12 PM

Originally Posted by RFM 40th V6

I was putting that in there because you said it would downshift randomly. I didn't mean for it to sound like the sole problem.

nah its all good just didn't know exactly what you meant by it
but the problems gone and im replacing the starter coil soon so it won't happen again
thanks guys

GreenFaleen · December 30th, 2009, 09:03 PM

yeah probably your coil pack, also check the shift relay on your transmission the downshift makes me wanna say its that

December 17th, 2009, 10:48 PM	#1
Mr.James Regular 2000 Mustang V6 Join Date: Jul 2009 Location: Central Pa Posts: 52 iTrader: 0 reviews	2000 v6 mustang engine problems so my auto 2000 v6 mustang has been beat up by the previous owner (the idiot) and has about 120,000 miles on it..well every now and then it will suddenly downshift, i lose all power, exhaust noise is nonexistant, and i have to floor it to go from 0-15 and it takes forever, and it shakes ALOT. its happened 4 times, everytime i just turn the car off and start her back up and it goes away, well tonight it did it to me twice in a row and after the 2nd time my Service engine soon light came on my dad thinks something with the electronics is screwed up. could it just be my ecu going bad or am i facing a more serious problem? i plan on taking it to Advanced auto parts tomorrow and having them check the error codes bc i heard they do it for free...any other suggestions?

December 19th, 2009, 07:56 PM	#3
xn1919 Regular 2000 mustang Join Date: Dec 2009 Location: kentucky Posts: 113 iTrader: 0 reviews	get a new one __________________ visco

December 30th, 2009, 09:03 PM	#15
GreenFaleen MM's Resident Ricer 2006 Scion tC 13.001@113 Join Date: Nov 2006 Location: Raleigh/Lenoir, NC Posts: 9,880 Blog Entries: 2 iTrader: 1 reviews	yeah probably your coil pack, also check the shift relay on your transmission the downshift makes me wanna say its that __________________ Scion Tc Turbo - 9psi 297whp 287wtq 2500lbs :p MM 4 Banger club: Senior Ricer NCMM #9 "Horsepower sells cars, torque wins races." -Carroll Shelby Last edited by GreenFaleen; December 30th, 2009 at 09:05 PM.

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December 20th, 2009, 03:06 AM	#5
rfcsoulja Hardcore Enthusiast 01 True Blue v6 to slow to matter Join Date: Mar 2009 Location: Oklahoma Posts: 1,141 iTrader: 0 reviews	Have you given it a tune up (plugs, wires, and coil possible)?

December 20th, 2009, 08:27 AM	#6
stephen Hardcore Enthusiast Join Date: Feb 2007 Posts: 1,262 iTrader: 0 reviews	Before guessing it would be good to read out the code from the OBD II system.

December 20th, 2009, 06:54 PM	#7
Mr.James Regular 2000 Mustang V6 Join Date: Jul 2009 Location: Central Pa Posts: 52 iTrader: 0 reviews	i talked to a mechanic friend of mine and he thinks that one of my O2 sensors is shot..could this be the culprit?

December 21st, 2009, 11:42 PM	#11
stephen Hardcore Enthusiast Join Date: Feb 2007 Posts: 1,262 iTrader: 0 reviews	If it's the O2 sensor, I don't see why the transmission would downshift when the problem happens. The O2 sensor should give an OBD II code. If the engine has more than 100K miles, the O2 sensors should be replaced anyway, so you might try replacing them.

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