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

Fuel Injector Prob...I think??

  • Thread starter Thread starter Goober89
  • Start date Start date Aug 2, 2007

Goober89

New Member
Jul 30, 2007
8
0
2
Palm Bay, FL
Aug 2, 2007
#1
  • Aug 2, 2007
  • #1
I have an 89LX, the problem is that when i first start it up and try to go anywhere it just bogs down when i give it gas. it kinda hesitates when you hit the throttle. I have full exhaust, cobra intake, 70mm TB, 73 Mass, stock block and heads, MSD. It has the stock injectors still. Is that the problem, and if so which size should i get. Oh yeah, when it gets warmed up its not as bad. thx for any help.
 

jrichker

StangNet's favorite TOOL
In Remembrance. Thank you for your contributions
Mar 10, 2000
27,512
2,813
234
Dublin GA
Aug 2, 2007
#2
  • Aug 2, 2007
  • #2
Dump the codes and see what the computer says is wrong…Codes may be present in the computer even if the Check Engine light isn’t on.

Here's the link to dump the computer codes with only a jumper wire or paper clip and the check engine light, or test light or voltmeter. I’ve used it for years, and it works great. You watch the flashing test lamp or Check Engine Light and count the flashes.

See http://www.troublecodes.net/Ford/





IF your car is an 86-88 stang, you'll have to use the test lamp or voltmeter method. There is no functional check engine light on the 86-88's except possibly the Cali Mass Air cars.



89 through 95 cars have a working Check Engine light. Watch it instead of a test lamp.



Codes have different answers if the engine is running from the answers that it has when the engine isn't running. It helps a lot to know if you had the engine running when you ran the test.

Trouble codes are either 2 digit or 3 digit, there are no cars that use both 2 digit codes and 3 digit codes.

For those who are intimidated by all the wires & connections, see http://www.actron.com/product_detail.php?pid=16153 for what a typical hand scanner looks like. Normal retail price is about $30 or so at AutoZone or Wal-Mart.

Or for a nicer scanner see http://www.midwayautosupply.com/pc-7208-90-equus-digital-ford-code-reader-3145.aspx – It has a 3 digit LCD display so that you don’t have to count flashes or beeps.. Cost is $30.
 
H

HaynStang

New Member
Dec 16, 2006
124
0
0
Portland
Aug 2, 2007
#3
  • Aug 2, 2007
  • #3
My car has the same issue but it is completely stock aside from exhaust and a K&N. Recently it has got to the point where on a cold start it'll immediately sputter and die on the first and sometimes even second attempt to start. Then it'll need to idle for a minute or two before you can move the car without it bogging real bad during the first 10 minute of the drive. When the engine gets warmed up it drives fine, never ever happens on a warm start either. This issue seems to get progressively worse the longer it's been since a tune-up.

Anyone else having this problem, and have any suggestions? I haven't bothered to pull codes yet since the car is due for a tune up anyway, but I'm going to do both tomorrow and see what comes up.
 

CornerCarvin67

New Member
Dec 30, 2004
246
0
0
Aug 27, 2008
#4
  • Aug 27, 2008
  • #4
So what did you find out? Run the codes? What did it say?


HaynStang said:
My car has the same issue but it is completely stock aside from exhaust and a K&N. Recently it has got to the point where on a cold start it'll immediately sputter and die on the first and sometimes even second attempt to start. Then it'll need to idle for a minute or two before you can move the car without it bogging real bad during the first 10 minute of the drive. When the engine gets warmed up it drives fine, never ever happens on a warm start either. This issue seems to get progressively worse the longer it's been since a tune-up.

Anyone else having this problem, and have any suggestions? I haven't bothered to pull codes yet since the car is due for a tune up anyway, but I'm going to do both tomorrow and see what comes up.
Click to expand...
 
You must log in or register to reply here.

Similar threads

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
M
Engine Unexplainable Exhaust Pop and Gurgle
  • Mrnissen122
  • Feb 14, 2026
  • Fox 5.0 Mustang Tech
Replies
12
Views
590
Fox 5.0 Mustang Tech Feb 18, 2026
Noobz347
8
Fox Mass Air Flow 42lb injectors
  • 89wreck
  • Aug 18, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
15
Views
823
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Sep 5, 2025
Scrapla347
8
Engine Rough idle and aggressive sputtering when accelerating
  • 88vertible
  • Aug 13, 2025
  • Fox 5.0 Mustang Tech
Replies
4
Views
1K
Fox 5.0 Mustang Tech Dec 13, 2025
Jarhead67
J
Engine Popping noise in the intake. Frustrated still.
  • esteban31065
  • Apr 6, 2025
  • Fox 5.0 Mustang Tech
Replies
15
Views
1K
Fox 5.0 Mustang Tech May 23, 2025
gkomo
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?