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

67 Galaxie w/ 91 5.0 EFI Swap not Running Right

  • Thread starter Thread starter bagd67galaxie
  • Start date Start date Mar 31, 2006

bagd67galaxie

New Member
Mar 31, 2006
11
0
0
Chatt.,TN
Mar 31, 2006
#1
  • Mar 31, 2006
  • #1
Here is the low down. I have a 1967 Galaxie Fastback with a 1991 Mustang EFI 5.0 swap. I have the motor in and all electrical connected to best of my knowledge. The car has cranked 3 times ,, this last time it ran for about a minute really fat and acted like the timing was retarded. I checked timing and fuel to this point and seems to be correct.

The motor is a stock bottom end 1987 and topend is B Cam ported and polished stock heads and gasket matched upper and lower also has 1.7 rollers. for the most part stock.

Any advise would be greatly appreciated ASAP ,,I have to have the car running by the 6th of April for a car show..

Thanks again,

Jason
 

JBeezy53

Member
Dec 28, 2003
559
1
19
Sacramento, Ca
Mar 31, 2006
#2
  • Mar 31, 2006
  • #2
Sorry I have no tech help, but me and my uncle just started doing a 5.0 efi swap into his 65 Galaxy Conv. I haven't seen to many other Galaxies with an efi swap.
 

JBeezy53

Member
Dec 28, 2003
559
1
19
Sacramento, Ca
Mar 31, 2006
#3
  • Mar 31, 2006
  • #3
What headers did you use?
 
8

8950HO

New Member
Mar 31, 2005
658
2
0
Mar 31, 2006
#4
  • Mar 31, 2006
  • #4
When I was a teenager a friends older brother had a 67 Galaxie fastback.
It came with a 390 auto then he dropped in a 428 with a 4spd trans.
That boat would burn rubber forever.
 

stang8urimport

Autozone Junkie
Founding Member
Jun 21, 2002
1,499
12
59
Daytona Beach, FL
Mar 31, 2006
#5
  • Mar 31, 2006
  • #5
Did you check the codes? Get an OBD-I scanner, like 20 bucks. This usually will tell you if you forgot to plug something in (saying it's not working, or bad), or will tell you you have a bad part. Good luck.

Nick
 

bagd67galaxie

New Member
Mar 31, 2006
11
0
0
Chatt.,TN
Mar 31, 2006
#6
  • Mar 31, 2006
  • #6
Im not running headers at the moment. I have tried several different ones.. I was told that the ones for a 67 comet work,, but the hook ones do not the tube design is too low for my car.. I have air ride on it and when it lays out it smash the headers... I did find some from headman that are a shorty style that apear to be the ticket...

I thought about the code reader,, not sure where the diagnostic plug is.. im tryn to find this stuff off of tiny wiring diagrams that really suck..

thanks for the help..

One guy mentioned the tps sensor that it had to be calibrated to read a volt or less. that seemed to help ,, the car is at least hitting once in a blue moon, in fact it cranked again but was still really fat...
 

stang8urimport

Autozone Junkie
Founding Member
Jun 21, 2002
1,499
12
59
Daytona Beach, FL
Apr 1, 2006
#7
  • Apr 1, 2006
  • #7
Well, you are talking about not having headers... Meaning you're running the exhaust right off the heads?? Could be your problem with no O2 sensors

Nick
 

jrichker

StangNet's favorite TOOL
In Remembrance. Thank you for your contributions
Mar 10, 2000
27,512
2,813
234
Dublin GA
Apr 1, 2006
#8
  • Apr 1, 2006
  • #8
Dump the codes and see what the computer says is wrong…

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.

See http://www.troublecodes.net/Ford/
OR
See http://www.mustangworks.com/articles/electronics/eec-iv_codes.html

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.

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 Walmart.

Or for a nicer scanner see http://www.midwayautosupply.com/detailedproductdescription.asp?3829 – It has a 3 digit LCD display so that you don’t have to count flashes or beeps.. Cost is $35.

Here's what the diagnostic connector looks like... The stock location is near the back side of the driver's wheel well.



 

bagd67galaxie

New Member
Mar 31, 2006
11
0
0
Chatt.,TN
Apr 1, 2006
#9
  • Apr 1, 2006
  • #9
PoopDawg said:
Well, you are talking about not having headers... Meaning you're running the exhaust right off the heads?? Could be your problem with no O2 sensors

Nick
Click to expand...


Running stock 289 manifolds with o2 sensors 10" from manifold collector
 

bagd67galaxie

New Member
Mar 31, 2006
11
0
0
Chatt.,TN
Apr 5, 2006
#10
  • Apr 5, 2006
  • #10
finally got the thing running.. there were 2 wires under the hood that needed to be connected off plug 31 to make it crank.. I bought the scanner jrichker and it did pull up the egr code, fixed that and the pressure regulator was busted and now it cranks well. Thanks for the help! Now just gotta set the tranny pressure and drive it hopefully.
 
You must log in or register to reply here.

Similar threads

6
Hey all,I’m putting together a 302 for my 1968 Mustang and wanted to post the combo + some questions to make sure I’m not missing crucial
  • 68_Disgustang
  • Feb 22, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
4
Views
982
1965 - 1973 Classic Mustangs -General/Talk- Jun 20, 2026
gray owl
G
S
Requesting Guidance for 306 motor swap - Fuel? - SD? MAF?
  • So_Flo
  • Jul 26, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
32
Views
2K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jan 4, 2026
Mcmahst
For Sale 3-owner 1987 Mustang GT, $18K obro, Lancaster CA
  • Bill Cool
  • Oct 6, 2024
  • Fox Body Mustangs For Sale (1979-93)
Replies
4
Views
2K
Fox Body Mustangs For Sale (1979-93) Oct 13, 2024
nickyb
R
Progress Thread Shelby's Mustang - project revived after 7 years...
  • racer_dave
  • Jul 31, 2023
  • 1974 - 1978 Mustang II Talk & Tech
Replies
13
Views
3K
1974 - 1978 Mustang II Talk & Tech May 3, 2025
racer_dave
R
A
1991 5.0 with HCI - started car, running for a few minutes, started pushing coolant into the overflow tank and then puking out from there. I'm lost
  • AmericanMuscle4.6GT
  • Oct 16, 2022
  • Fox 5.0 Mustang Tech
Replies
6
Views
4K
Fox 5.0 Mustang Tech Nov 30, 2022
CAMTWO1070
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?