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

92 issue

  • Thread starter Thread starter Dave92
  • Start date Start date Jul 12, 2022
D

Dave92

New Member
Jul 12, 2022
2
0
1
Unknown
Jul 12, 2022
#1
  • Jul 12, 2022
  • #1
So I recently upgraded to 22lb injectors in my 1992 302 HO. I put a mass air rated to 24 lb calibrated. Bbk fuel rails. I started it up and I’m get a lot of hesitation from the engine. Shakes bad and blue smoke when I rev it up. I’m doing a regulator tomorrow and a gauge. Any ideas what my problem could be?
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
27,983
10,611
213
polk county florida
Jul 12, 2022
#2
  • Jul 12, 2022
  • #2
Miss matched parts on an unmodified computer controlled car is asking for trouble, the computer works around a certain set of perimeters and info from sensors, basically it is getting conflicting info and can't control the 22lb injectors with a maf calibrated for 24s.
Why are you doing this?
 

Potomus Pete

I'm still waiting for the fully nude shots
5 Year Member
Mar 7, 2019
3,314
1,226
153
Sarasota Florida
Jul 12, 2022
#3
  • Jul 12, 2022
  • #3
Did you save the 19's You may want to put them back on
 
D

Dave92

New Member
Jul 12, 2022
2
0
1
Unknown
Jul 13, 2022
#4
  • Jul 13, 2022
  • #4
Should I up them to 24lb? I wanted to update the fuel system on the car. Give a nicer look also with the new rails. I tossed the old ones as some of them weren’t in the best shape.
 

Potomus Pete

I'm still waiting for the fully nude shots
5 Year Member
Mar 7, 2019
3,314
1,226
153
Sarasota Florida
Jul 13, 2022
#5
  • Jul 13, 2022
  • #5
You at least have to have an exact match on injectors/MAF. Did you get injectors on E Bay. The reviews on those are terrible. You may have to go get some origionals if all else fails. Post a picture of the car so we can see what you got.
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
27,983
10,611
213
polk county florida
Jul 13, 2022
#6
  • Jul 13, 2022
  • #6
There are injectors the ecu is not setup to deal with like high vrs low impedance types of injectors, remember with EFI bigger is not better.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,272
17,961
224
Massachusetts
Jul 13, 2022
#7
  • Jul 13, 2022
  • #7
What 22# injectors do you have? If you measure resistance across the coil on the injector, do you get 14.4 ohms?
 
You must log in or register to reply here.

Similar threads

D
Progress Thread Calypso Green 92 LX Hatchback
  • Dakar09
  • May 18, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
15
Views
450
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Monday at 7:18 PM
AeroCoupe
M
Resolved 1988 Foxbody - Overheating Summer
  • MDrisc
  • Oct 26, 2025
  • Fox 5.0 Mustang Tech
Replies
16
Views
742
Fox 5.0 Mustang Tech Jul 17, 2026
fasterthangas
F
K
Engine 2000 Mustang GT - Fuel issue post-blown spark plug repair
  • kenster1092
  • Feb 26, 2026
  • SN95 4.6L Mustang Tech
Replies
4
Views
401
SN95 4.6L Mustang Tech Mar 10, 2026
kenster1092
K
I
Engine Insane fuel trims +25% LTFT Bank 1, -16% LTFT Bank 2
  • imw_stl
  • Aug 31, 2025
  • SN95 4.6L Mustang Tech
Replies
2
Views
336
SN95 4.6L Mustang Tech Sep 19, 2025
Mustang5L5
Resolved 93 Mustang 5.0 - Cranks but does not start
  • dan50
  • Jul 18, 2026
  • Fox 5.0 Mustang Tech
Replies
6
Views
243
Fox 5.0 Mustang Tech Jul 18, 2026
dan50
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?