• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Feels Like My Car Is Lacking Power!

  • Thread starter Thread starter Antfrank
  • Start date Start date Apr 6, 2017
A

Antfrank

Member
Mar 20, 2017
16
7
13
Apr 6, 2017
#1
  • Apr 6, 2017
  • #1
hey everyone I had a question hoping some of you mustang guys would have an answer to. I'm new to muscle cars especially mustangs. Now my car feels like it has little acceleration in first and second but after 3000k rpm it gets better but then after 4000-4500 rpm it feels like it's struggling again. I didn't notice it much because I'm new to muscle cars but after a buddy pointed it out it makes sense. Now my mods are cold air, edelbrok upper and lower intake, shorty headers, o/r h pipe, slp loudmouth cat back (that I just recently put on), smog delete, ac delete, misihmoto radiator. I bought this car about a month ago guy said it was dyno tuned and can only run on 93 octane gas. Anyone know why I might be lacking power?
Also forgot to mention once I get on the gas the check engine light will come on. (Edit sorry) once car warms up and I'm at a red light car dies out if I don't give it gas
Thanks in advance
 
Last edited: Apr 7, 2017
D

Deleted member 215073

Apr 7, 2017
#2
  • Apr 7, 2017
  • #2
If that's a stock MAF, that's a choke point. Get a bigger one.
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,899
10,553
203
polk county florida
Apr 7, 2017
#3
  • Apr 7, 2017
  • #3
Ooo-k, first off, don't tease us with a pic of the dog house (see what I did? dog? no power? Geez tough crowd.
Show some pics of the rest of that ride, you get much better advice with pics of your car or beer with strange names,
Next call the previous owner and ask for a copy of the dyno sheet, he likely can't find it but it's worth a try.
Now lets get to work on your car:
Check for codes, there are instructions in the tech section, It was put together by jrichker, who is much smarter than me but then, so is most everybody here, it is always the first place to start and I recommend do'n this periodically.
http://www.stangnet.com/mustang-forums/threads/how-to-pull-codes-from-eec4.889006/
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,899
10,553
203
polk county florida
Apr 7, 2017
#4
  • Apr 7, 2017
  • #4
Another thing to look at, you appear to have an updated alternator, check out the 3g up grade in the tech section, if it is not done correctly it could be tragic.
http://www.stangnet.com/mustang-forums/resources/3g-alternator-fox-upgrade.18/
 
Reactions: SF Lex

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,244
17,924
224
Massachusetts
Apr 7, 2017
#5
  • Apr 7, 2017
  • #5
Step #1....run the codes. You have a CEL so need to see what it says
 
D

Deleted member 215073

Apr 7, 2017
#6
  • Apr 7, 2017
  • #6
I missed the CEL being on. Run codes, and report back.
 
A

Antfrank

Member
Mar 20, 2017
16
7
13
Apr 7, 2017
#7
  • Apr 7, 2017
  • #7
Gonna check codes in a little and update you guys to let you know what's going on
 

Attachments

  • IMG_0198.webp
    327.9 KB · Views: 214
  • IMG_0222.webp
    775.7 KB · Views: 236
A

Antfrank

Member
Mar 20, 2017
16
7
13
Apr 7, 2017
#8
  • Apr 7, 2017
  • #8
karthief said:
Ooo-k, first off, don't tease us with a pic of the dog house (see what I did? dog? no power? Geez tough crowd.
Show some pics of the rest of that ride, you get much better advice with pics of your car or beer with strange names,
Next call the previous owner and ask for a copy of the dyno sheet, he likely can't find it but it's worth a try.
Now lets get to work on your car:
Check for codes, there are instructions in the tech section, It was put together by jrichker, who is much smarter than me but then, so is most everybody here, it is always the first place to start and I recommend do'n this periodically.
http://www.stangnet.com/mustang-forums/threads/how-to-pull-codes-from-eec4.889006/
Click to expand...
 

Attachments

  • IMG_0189.webp
    111.4 KB · Views: 208
  • IMG_0190.webp
    131.3 KB · Views: 211
Reactions: General karthief
A

Antfrank

Member
Mar 20, 2017
16
7
13
Apr 7, 2017
#9
  • Apr 7, 2017
  • #9
The
karthief said:
Ooo-k, first off, don't tease us with a pic of the dog house (see what I did? dog? no power? Geez tough crowd.
Show some pics of the rest of that ride, you get much better advice with pics of your car or beer with strange names,
Next call the previous owner and ask for a copy of the dyno sheet, he likely can't find it but it's worth a try.
Now lets get to work on your car:
Check for codes, there are instructions in the tech section, It was put together by jrichker, who is much smarter than me but then, so is most everybody here, it is always the first place to start and I recommend do'n this periodically.
http://www.stangnet.com/mustang-forums/threads/how-to-pull-codes-from-eec4.889006/
Click to expand...
guy said said he doesn't know where the dyno sheet is which makes me question if he ever even did it in the first place
 

SF Lex

Advanced Member
Mar 8, 2016
230
125
73
CoCo County, California
May 29, 2017
#10
  • May 29, 2017
  • #10
karthief said:
Another thing to look at, you appear to have an updated alternator, check out the 3g up grade in the tech section, if it is not done correctly it could be tragic.
http://www.stangnet.com/mustang-forums/resources/3g-alternator-fox-upgrade.18/
Click to expand...
This is on my list to do also, glad you guys have a post on this. When doing the alternator upgrade, what else besides the guage wire needs to be upgraded ? Like the coil ? Battery ? ect .. Want to make sure i have a total budge for it all.
Also what bout putting a 140 Amp, or 160 Amp, or a 200 Amp. Does it matter if you go higher then 140 ?
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,244
17,924
224
Massachusetts
May 29, 2017
#11
  • May 29, 2017
  • #11
I'd say short of having a big stereo system, or a race car with electric fan, water pump, multiple fuel pumps, etc, Not much need to go beyond 130 amps.

Basic fox with e fan will run fine on 130A, or even 110A
 
Last edited: May 29, 2017
Reactions: SF Lex
You must log in or register to reply here.

Similar threads

Engine Surging idle on start-up
  • keel
  • Aug 11, 2025
  • Fox 5.0 Mustang Tech
Replies
16
Views
895
Fox 5.0 Mustang Tech Oct 31, 2025
keel
B
Acceleration Vibration
  • Blown02svt
  • Dec 31, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
13
Views
615
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jan 5, 2026
General karthief
J
Emission problems
  • jls.zmmr
  • Feb 5, 2026
  • 1994 - 1995 Specific Tech
Replies
2
Views
239
1994 - 1995 Specific Tech Feb 7, 2026
AeroCoupe
P
2000 GT Random Power Loss
  • Pinellas50
  • Mar 9, 2026
  • SN95 4.6L Mustang Tech
Replies
4
Views
276
SN95 4.6L Mustang Tech Mar 23, 2026
Pinellas50
P
1
Engine 91 mustang 302 Low acceleration car backfires pops and acts like it doesn’t want to take fuel
  • 1991Fox5.0
  • Oct 4, 2025
  • Fox 5.0 Mustang Tech
Replies
16
Views
1K
Fox 5.0 Mustang Tech Oct 6, 2025
1991Fox5.0
1
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 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?