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

low compression

  • Thread starter Thread starter Guled22
  • Start date Start date Aug 17, 2006
Prev
  • 1
  • 2
  • 3
First Prev 3 of 3
G

Guled22

New Member
Apr 2, 2004
61
0
0
Aug 27, 2006
#41
  • Aug 27, 2006
  • #41
ok another quick update, just threw a code and now it says cylinder 1 misfire. so since I switched the coil packs would that be the reason since the misfire moved?
 

Mike97gt

it doe snot
Founding Member
Jan 26, 1999
10,633
7
89
the people's republic of massachusetts
Aug 27, 2006
#42
  • Aug 27, 2006
  • #42
Guled22 said:
ok another quick update, just threw a code and now it says cylinder 1 misfire. so since I switched the coil packs would that be the reason since the misfire moved?
Click to expand...


yeah.. the coil pack is your problem then.. I just looked at the diagram.. what was number 4 is where the number 1 wire will go when you swap them so replace that coilpack and your car should be fixed..

Be sure to update us on this..
 
G

Guled22

New Member
Apr 2, 2004
61
0
0
Aug 27, 2006
#43
  • Aug 27, 2006
  • #43
cool, i just got two new duralast ones from autozone. i drove the car down the street earlier, and had it idle for about 20 mins do you think fuel got into the fresh oil? and do you think the cylinder 1 got fuel wash too?
 

BurningRubber

10 Year Member
Dec 6, 2004
1,865
24
58
Aug 27, 2006
#44
  • Aug 27, 2006
  • #44
svttech76 said:
yeah.. the coil pack is your problem then.. I just looked at the diagram.. what was number 4 is where the number 1 wire will go when you swap them so replace that coilpack and your car should be fixed..

Be sure to update us on this..
Click to expand...


Damn man, you deserve an award... you could have just saved him some serious money...

Pretty sweet to have a Ford tech on the boards to help everyone out.
 
G

Guled22

New Member
Apr 2, 2004
61
0
0
Aug 27, 2006
#45
  • Aug 27, 2006
  • #45
BurningRubber said:
Damn man, you deserve an award... you could have just saved him some serious money...

Pretty sweet to have a Ford tech on the boards to help everyone out.
Click to expand...

I know huh, he just saved me $1500 in debt. but all jokes aside thank you for all your help man i really appreciate it.
 

Mike97gt

it doe snot
Founding Member
Jan 26, 1999
10,633
7
89
the people's republic of massachusetts
Aug 27, 2006
#46
  • Aug 27, 2006
  • #46
Guled22 said:
cool, i just got two new duralast ones from autozone. i drove the car down the street earlier, and had it idle for about 20 mins do you think fuel got into the fresh oil? and do you think the cylinder 1 got fuel wash too?
Click to expand...


As long as the oil looks and smells normal you should be fine, I doubt you ran it very long misfiring like that. You might have to clean the number 1 plug and reinstall it.

so how does it run with the new coils?

BurningRubber said:
Damn man, you deserve an award... you could have just saved him some serious money...

Pretty sweet to have a Ford tech on the boards to help everyone out.
Click to expand...

Guled22 said:
I know huh, he just saved me $1500 in debt. but all jokes aside thank you for all your help man i really appreciate it.
Click to expand...

Thanks
 
G

Guled22

New Member
Apr 2, 2004
61
0
0
Aug 27, 2006
#47
  • Aug 27, 2006
  • #47
i have the new coils in, and it runs smoother than the day i first bought it lol. I highly doubt its going to throw a code because its running so smooth. So yea thanks again man, I was so close to having the engine rebuilt for no reason.
 

BurningRubber

10 Year Member
Dec 6, 2004
1,865
24
58
Aug 27, 2006
#48
  • Aug 27, 2006
  • #48
Guled22 said:
i have the new coils in, and it runs smoother than the day i first bought it lol. I highly doubt its going to throw a code because its running so smooth. So yea thanks again man, I was so close to having the engine rebuilt for no reason.
Click to expand...


Man, think how pissed youd be after they rebuilt the engine and the misfire was still there cause they used the same bad coil pack...

Wow, I would come out swinging... lol.
 
T

Torinalth

Founding Member
Jul 16, 2002
952
0
16
Clayton NC
Aug 28, 2006
#49
  • Aug 28, 2006
  • #49
OT but this is one reason i stay around here... if anyone with experience leaves the site and moves off to the elite sites, or part spacific sites, then there would be a lot of unhappy mustang owners with nowhere to turn. yeah it sucks losing experienced people that can help, people like SVT around here help a load of people daily. Granted i cant help with much, but i wont be leaving so i can repay what i have gleaned. good feeling.

Nice on SVT.

Torinalth
 

Mike97gt

it doe snot
Founding Member
Jan 26, 1999
10,633
7
89
the people's republic of massachusetts
Aug 28, 2006
#50
  • Aug 28, 2006
  • #50
LOL tell that ford dealer they can have me come work for them, but I would need 35 bucks per flat rate hour with a 60 hour guarantee.. plus I want my own IDS setup and for them to pay to relocate my family out there..
 

stangGT97

New Member
Dec 22, 2004
1,299
1
0
Boston area, MA
Aug 28, 2006
#51
  • Aug 28, 2006
  • #51
svttech FTW! :SNSign:
 

COramprat

...I can take it. I think.
20+ Year Stangneter
Mar 2, 2003
8,474
1,463
223
Sea of Tranquility
Aug 28, 2006
#52
  • Aug 28, 2006
  • #52
I just went through the same thing (No 6 misfire.) with my Expedition. I swapped plugs and wire and seems to have taken care of the problem. Of course the misfire has been there a while so I'm hoping it stays right. Good info here if I have to run down a gremlin. With 196K miles I don't expect much but this thing still runs pretty good.
 

Mike97gt

it doe snot
Founding Member
Jan 26, 1999
10,633
7
89
the people's republic of massachusetts
Aug 28, 2006
#53
  • Aug 28, 2006
  • #53
COramprat said:
I just went through the same thing (No 6 misfire.) with my Expedition. I swapped plugs and wire and seems to have taken care of the problem. Of course the misfire has been there a while so I'm hoping it stays right. Good info here if I have to run down a gremlin. With 196K miles I don't expect much but this thing still runs pretty good.
Click to expand...


You should be fine now, once it's runnign right you don't have to worry about the effects of fuel wash, but to be sure check the oil and make sure it's not loaded with fuel
 

CanadaStang

New Member
Sep 7, 2003
2,093
1
0
Mb
Aug 29, 2006
#54
  • Aug 29, 2006
  • #54
It makes me wonder what the mechanics you took your car to actually tested. As I said previously, the compression on the cylinder in question would have to be very very low in order to be too low not to fire. If they would have at least discovered the coil pak issue [an ignition test should have been one of the very first things to perform] and then still could not have been able get that cylinder to fire, then at least one could perhaps blame fuel wash but they didn't even know there was a problem with the coil pak.
That is precisely why I had suggested checking that cylinder for compression, if it was less than 50psi then there would be no point in checking anything else, if it was less than the others but still acceptable, then the problem is with the ignition and fuel wash is causing the lower compression.
 

Mike97gt

it doe snot
Founding Member
Jan 26, 1999
10,633
7
89
the people's republic of massachusetts
Aug 29, 2006
#55
  • Aug 29, 2006
  • #55
CanadaStang said:
It makes me wonder what the mechanics you took your car to actually tested. As I said previously, the compression on the cylinder in question would have to be very very low in order to be too low not to fire. If they would have at least discovered the coil pak issue [an ignition test should have been one of the very first things to perform] and then still could not have been able get that cylinder to fire, then at least one could perhaps blame fuel wash but they didn't even know there was a problem with the coil pak.
That is precisely why I had suggested checking that cylinder for compression, if it was less than 50psi then there would be no point in checking anything else, if it was less than the others but still acceptable, then the problem is with the ignition and fuel wash is causing the lower compression.
Click to expand...


I agree 100 percent. I can't speak for the rebuilding and machine shops but there is a lot of morons and hacks in general repair both at the dealers and the private shops. Many techs just don't have the skill or don't care to spend the time.
 

COramprat

...I can take it. I think.
20+ Year Stangneter
Mar 2, 2003
8,474
1,463
223
Sea of Tranquility
Aug 29, 2006
#56
  • Aug 29, 2006
  • #56
svttech76 said:
I agree 100 percent. I can't speak for the rebuilding and machine shops but there is a lot of morons and hacks in general repair both at the dealers and the private shops. Many techs just don't have the skill or don't care to spend the time.
Click to expand...
Not to mention the 1500 smakers they collect.
 

stangGT97

New Member
Dec 22, 2004
1,299
1
0
Boston area, MA
Aug 29, 2006
#57
  • Aug 29, 2006
  • #57
svttech76 said:
I agree 100 percent. I can't speak for the rebuilding and machine shops but there is a lot of morons and hacks in general repair both at the dealers and the private shops. Many techs just don't have the skill or don't care to spend the time.
Click to expand...

this is why I am very skeptical about having other people working on my car unless I know them well or have heard lots of positive testimonials.
 

BurningRubber

10 Year Member
Dec 6, 2004
1,865
24
58
Aug 29, 2006
#58
  • Aug 29, 2006
  • #58
stangGT97 said:
this is why I am very skeptical about having other people working on my car unless I know them well or have heard lots of positive testimonials.
Click to expand...

Preach on. Thats why I want to go to automotive tech school. So I can do everything myself, and work at a shop or dealership, and not rip people off...
 

CanadaStang

New Member
Sep 7, 2003
2,093
1
0
Mb
Aug 29, 2006
#59
  • Aug 29, 2006
  • #59
svttech76 said:
I agree 100 percent. I can't speak for the rebuilding and machine shops but there is a lot of morons and hacks in general repair both at the dealers and the private shops. Many techs just don't have the skill or don't care to spend the time.
Click to expand...

I personally have not had any issues with machine shops but, like you, I've seen alot of very poor work come from engine rebuilders, dealers and private shops.
 
Prev
  • 1
  • 2
  • 3
First Prev 3 of 3
You must log in or register to reply here.

Similar threads

K
Engine 2000 Mustang GT - Fuel issue post-blown spark plug repair
  • kenster1092
  • Feb 26, 2026
  • SN95 4.6L Mustang Tech
Replies
4
Views
285
SN95 4.6L Mustang Tech Mar 10, 2026
kenster1092
K
A
2020 Ford Mustang GT P0036, P0138, P0141 02 sensor help
  • AmkoA
  • Jul 29, 2025
  • 2015 - 2023 (S550) Mustang -General/Talk
Replies
1
Views
288
2015 - 2023 (S550) Mustang -General/Talk Aug 5, 2025
skkrtis
S
S
Fuel ‘88 GT Runs Rich Cold — Fixes Itself When I Unplug Sensors (ECT, MAF, O2, etc.)
  • Sufarry
  • Nov 6, 2025
  • Fox 5.0 Mustang Tech
Replies
12
Views
712
Fox 5.0 Mustang Tech Nov 9, 2025
Mustang5L5
9
96 mustang gt
  • 96projectgt
  • May 2, 2025
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • 2 3
Replies
48
Views
1K
1996 - 2004 SN95 Mustang -General/Talk- May 15, 2025
96projectgt
9
B
'03 GT Fuel Pump/Pressure/Delivery Issue
  • Brodach
  • Oct 21, 2025
  • SN95 4.6L Mustang Tech
Replies
8
Views
813
SN95 4.6L Mustang Tech Oct 31, 2025
gkomo
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?