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  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

2001 GT Suddenly sputtering under accelaration

  • Thread starter Thread starter trueblue
  • Start date Start date Jul 26, 2005
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rblcollee

New Member
Oct 21, 2001
133
0
0
Lawrenceville GA
Jul 28, 2005
#21
  • Jul 28, 2005
  • #21
I have the same problem! it misses at 15000-21000RPM and after that it really dosnt do it. I have changed pluges, wires, coils and fuel filter with no luck.
 
W

Will Smith

New Member
Aug 8, 2004
191
0
0
Cape Coral, FL
Jul 29, 2005
#22
  • Jul 29, 2005
  • #22
KronicRacer said:
you are also going to need the line loc release tool it works on a/cs too heres the pic

Click to expand...

u actually only need a flat head screw driver. forget wasting money on that thing.
 

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GDawg

Founding Member
Mar 22, 2002
1,469
19
68
Nevada
Jul 29, 2005
#23
  • Jul 29, 2005
  • #23
Will Smith said:
u actually only need a flat head screw driver. forget wasting money on that thing.
Click to expand...

Or you can buy the cheaper little plastic ones that they sell at Pep Boys or any other parts store.
 

KronicRacer

Member
Jun 23, 2004
502
1
18
puttering around Ft Lauderdale, FL
Jul 29, 2005
#24
  • Jul 29, 2005
  • #24
01stangt said:
How do you reset the pcm
Click to expand...


disconnect the neg battery terminal for 2 hrs
 

04GT

New Member
Oct 8, 2003
284
0
0
Southwest Ohio
Aug 2, 2005
#25
  • Aug 2, 2005
  • #25
Any updates here? Mine has continued to get worse with the hot weather. What's weird is that if I turn the car off and then start it again, it gets better for awhile. I'm suspecting the fuel pump. If it was electrical, I think it would be a more constant problem. I'm taking it to the shop next week.
 

Shiroelex

There's nothing worse than aut
Founding Member
Aug 23, 2001
728
1
27
Westland, MI
Aug 2, 2005
#26
  • Aug 2, 2005
  • #26
I've experienced a similar problem. Mine was most noticable in 5th gear, while pushing hard on the gas. Turned out to be a bad COP in my case. They boots let humidity into the plug wells, and they end up going bad.

Also, it should only take about 5 minutes of an undone negative battery cable to reset the computer. Not 2 hours.
 

twogts4us

15 Year Member
Apr 1, 2004
4,188
12
79
Dunedin, FL
Aug 2, 2005
#27
  • Aug 2, 2005
  • #27
GDawg said:
Or you can buy the cheaper little plastic ones that they sell at Pep Boys or any other parts store.
Click to expand...
Agreed! Those scissor style tools are a PITA. The little plastic disconnects make it simple. I fought with the scissor type for 30 minutes, then got the plastic one - and I was done in 30 secs.
 

twogts4us

15 Year Member
Apr 1, 2004
4,188
12
79
Dunedin, FL
Aug 2, 2005
#28
  • Aug 2, 2005
  • #28
rblcollee said:
I have the same problem! it misses at 15000-21000RPM and after that it really dosnt do it. I have changed pluges, wires, coils and fuel filter with no luck.
Click to expand...
Me thinks you're winding it up a bit too tight!
 

twogts4us

15 Year Member
Apr 1, 2004
4,188
12
79
Dunedin, FL
Aug 2, 2005
#29
  • Aug 2, 2005
  • #29
Here's a great website and an example of their write-ups - this one on how to chg your fuel filter.
http://www.bullittarchive.com/html/modules/articles/article.php?id=73
But I disagree on one point in the article -don't bother relieving pressure via the schrader valve - it's a waste of time. You will lose a bit of fuel when swapping the filter...but it's only about as much as the filter holds...no biggie. (Just expect to have a gasoline smelly hand/forearm til you take a shower!)
 

04GT

New Member
Oct 8, 2003
284
0
0
Southwest Ohio
Aug 4, 2005
#30
  • Aug 4, 2005
  • #30
Shiroelex said:
I've experienced a similar problem. Mine was most noticable in 5th gear, while pushing hard on the gas. Turned out to be a bad COP in my case. They boots let humidity into the plug wells, and they end up going bad.

Also, it should only take about 5 minutes of an undone negative battery cable to reset the computer. Not 2 hours.
Click to expand...

Hooked up a predator to mine today and got this code:

P0305 - Cylinder 5 Misfire Detected.

It was hesitating real bad on the way home and check engine light cam on, too. Planning to yank the plugs on Saturday.

How much does a replacement COP cost?
 

twogts4us

15 Year Member
Apr 1, 2004
4,188
12
79
Dunedin, FL
Aug 4, 2005
#31
  • Aug 4, 2005
  • #31
04GT said:
How much does a replacement COP cost?
Click to expand...
On an 2004 GT? Warranty!
 

twogts4us

15 Year Member
Apr 1, 2004
4,188
12
79
Dunedin, FL
Aug 4, 2005
#32
  • Aug 4, 2005
  • #32
trueblue said:
Before I bend over and grab my ankles...
...before I give the Blue Oval my brown round for their pleasure...
Click to expand...
Do you have some sort of anal sex fascination?
 

trueblue

Founding Member
Mar 4, 2001
230
0
0
Driving behind a Pennsylvania driver in 3rd gear,
Aug 4, 2005
#33
  • Aug 4, 2005
  • #33
COIL PACK - CYL 8

Apparently the coil packs pitch a loaf right about this time. The car runs great!

They also tried to sell me $150 injector cleaning, nice try but no cigar.

Good luck to all of you, and thanks for the help!

-TB
 

trueblue

Founding Member
Mar 4, 2001
230
0
0
Driving behind a Pennsylvania driver in 3rd gear,
Aug 4, 2005
#34
  • Aug 4, 2005
  • #34
twogts4us said:
Do you have some sort of anal sex fascination?
Click to expand...

Only one way to describe dealer prices. The word "high" just doesn't capture it
 

04GT

New Member
Oct 8, 2003
284
0
0
Southwest Ohio
Aug 5, 2005
#35
  • Aug 5, 2005
  • #35
twogts4us said:
On an 2004 GT? Warranty!
Click to expand...

Um, not if you got over 37K miles on the 2004 GT.
 

04GT

New Member
Oct 8, 2003
284
0
0
Southwest Ohio
Aug 5, 2005
#36
  • Aug 5, 2005
  • #36
trueblue said:
COIL PACK - CYL 8

Apparently the coil packs pitch a loaf right about this time. The car runs great!

They also tried to sell me $150 injector cleaning, nice try but no cigar.

Good luck to all of you, and thanks for the help!

-TB
Click to expand...

So did they only replace one? a few? all?
 

BigChiefSmokem

Founding Member
Feb 20, 2002
1,400
0
36
Jacksonville, FL
Aug 5, 2005
#37
  • Aug 5, 2005
  • #37
trueblue said:
COIL PACK - CYL 8

Apparently the coil packs pitch a loaf right about this time. The car runs great!

They also tried to sell me $150 injector cleaning, nice try but no cigar.

Good luck to all of you, and thanks for the help!

-TB
Click to expand...

How many miles you have on your car? My mechanic said that i may have coil packs going bad, after i took her there for a tune up because the car was doing the same thing yours was... had them replace the fuel filter and the spark plugs, which fixed the problem...

BTW... and this is a stupid question, what and where are the coil packs and what do they do?
 

04GT

New Member
Oct 8, 2003
284
0
0
Southwest Ohio
Aug 5, 2005
#38
  • Aug 5, 2005
  • #38
BigChiefSmokem said:
How many miles you have on your car? My mechanic said that i may have coil packs going bad, after i took her there for a tune up because the car was doing the same thing yours was... had them replace the fuel filter and the spark plugs, which fixed the problem...

BTW... and this is a stupid question, what and where are the coil packs and what do they do?
Click to expand...

The coil packs replace the old distributor cap and wires that engines used to have. Each one contains an ignition coil and sits on top of a spark plug. They are sending the spark to your plugs.

I'm NOT an expert, but this is what I've learned. Oh yeah, they are about $125 each at your local ford dealer.

When they are going bad, I guess they cause your plugs to go bad early. So replacing the plugs would fix it for awhile.
 

04GT

New Member
Oct 8, 2003
284
0
0
Southwest Ohio
Aug 8, 2005
#39
  • Aug 8, 2005
  • #39
Looks like I fixed my problem!

Hooked up my new predator and got a code about misfire on cylinder#5. So I replaced plugs and the coil on that cylinder.

Might be too early to tell, but so far it seems to be running great!
 

forpit2000gt

Founding Member
Jun 30, 2002
2,490
0
0
Columbia, SC
Aug 8, 2005
#40
  • Aug 8, 2005
  • #40
did you run any octane boost or race fuel? someone brought a mustang into a friends shop a while back that put 104 in to go faster and killed the plugs and o2s.
 
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