DIS Problem, Tach at 1/2, codes 223,224

HOWNDOG

Member

Aug 24, 2003

186

0

16

Vancouver Island

Jul 20, 2008

#1

• Jul 20, 2008

• #1

Hi all.

From my searches it seems I might have an ICM problem but I'm not 100% sure.

The tach is at 1/2 mast (once in awhile returns to normal).
Pulled KOEO and continuous codes 223 and 224.
Engine seems to miss a bit at times.

I had the batt disconnected and after that the tach was fine for about a week and check engine light was out but the problem came back.


I have manuals and such but they have very little on the DIS system. Any suggestions on simple diagnostics before I replace the wrong parts?

Thx.
HD

 

D

dreamer1uk

New Member

May 9, 2008

33

0

0

Jul 20, 2008

#2

• Jul 20, 2008

• #2

Hi,

You can have the ICM tested at some stores. Codes 224 and 223 usualy are a sign of a bad ICM, even more so if your tach is acting up.

 

HOWNDOG

Member

Aug 24, 2003

186

0

16

Vancouver Island

Jul 22, 2008

#3

• Jul 22, 2008

• #3

Thx.

I'll see if I can find somebody to test the ICM.


HD

 

stykthyn

I want to measure mine. It doesn't look that tall.

15 Year Member

Jul 6, 2006

5,232

2,652

223

gainesville

Jul 28, 2008

#4

• Jul 28, 2008

• #4

testing is almost worthless as the ICM wont fail until it heats up. make sure all the connections are tight, if everything checks out and you still have a problem then I would get a new ICM.

 

HOWNDOG

Member

Aug 24, 2003

186

0

16

Vancouver Island

Jul 29, 2008

#5

• Jul 29, 2008

• #5

I pulled off and reconnected everything without success but I'll try again. I don't think it's a heat issue though as it acts up right from a cold start.


thx
HD

 

stykthyn

I want to measure mine. It doesn't look that tall.

15 Year Member

Jul 6, 2006

5,232

2,652

223

gainesville

Jul 29, 2008

#6

• Jul 29, 2008

• #6

I'd bet you my next paycheck you have a bad module

 

glowstang93

20+ Year Stangneter

Feb 9, 2003

853

8

39

Illinois

Aug 11, 2008

#7

• Aug 11, 2008

• #7

I had a code 223 and 224,, Changed module, ran better, check engine light came back on, had a bad coil pack. 3 yrs later, got a code 223, bad coil pack. So I am assuming that a 223 means more coil pack problems and a code 224 more icm. But the tach bouncing 1/2 way is a defiinite ICM characteristic. The best part about both is they are very simple to replace, just don't forget to put the dielectric grease on back of the icm where it mounts and never hurts to use some silicone grease on the plug wires.



View attachment 308172

 

HOWNDOG

Member

Aug 24, 2003

186

0

16

Vancouver Island

Aug 11, 2008

#8

• Aug 11, 2008

• #8

Thx.

I placed my order for an ICM this morning and sure hope that's it. Sad part is that it's expensive and will be useless if I ever get the time for my turbo swap.


HD

 

glowstang93

20+ Year Stangneter

Feb 9, 2003

853

8

39

Illinois

Aug 18, 2008

#9

• Aug 18, 2008

• #9

Howndog.... did you get it all fixed up ? Running ok now?

 

HOWNDOG

Member

Aug 24, 2003

186

0

16

Vancouver Island

Aug 18, 2008

#10

• Aug 18, 2008

• #10

I thought I'd run it a few days to make sure.

I took the old ICM off, cleaned and reinstalled it with no effect so I put the new one in.

The tach is back up and it runs smoother again and idiot light is off. Must have been the ICM.

I cleared the computor as well so I can check which (if any) codes return.

thx again,
HD