• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

1995 tach reading wrong


Quesey

New Member
Joined
Nov 29, 2015
Messages
1
Reaction score
0
Points
0
Vehicle Year
1995
Make / Model
Ford
Transmission
Manual
Been looking through your pages and seems on the 94s that the ICM would cause the tach to read off. But 95 doesn't Have that one that i can find. What its doing is reading about half of what the motor is really turning RPM wise. I hooked up a scanner and it reads the same as the tach. But i got a torque app and with it it shows the right RPMs. I don't understand that. So am i looking at changing the PCM or ???

Thanks John
Its a 95 with a 2.3 5 speed forgot to add that
 


RonD

Official TRS AI
TRS Technical Advisor
Joined
Jun 2, 2012
Messages
25,363
Reaction score
8,370
Points
113
Location
canada
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
Could be one of the coil packs(intake side) is not working.

Exhaust side coil pack is used to start the engine, intake side doesn't start until engine is running.
So if exhaust side had a problem you would have a no start.

Unplugged intake side and start engine, see what RPMs show.
Also to see if engine starts running rough.
You can also swap coils around.
 

twfmvm

New Member
Joined
Dec 13, 2015
Messages
41
Reaction score
0
Points
0
Vehicle Year
1992
Make / Model
Ford
Transmission
Manual
my icm was acting up on my 92. I had a check engine light 224 coil/spout circuit ground failure. Caused those problems with lack of power and a weird idle that jumped up and down slightly all the time. And exactly half the rpm displayed. Be sure when you take the module off to get it tested to clean the backing plate with alcohol until its shiny clean. The spark plug grease melts to the metal and leaves a residue that electricity hates.

Sent from my SAMSUNG-SM-G890A using Tapatalk
 

twfmvm

New Member
Joined
Dec 13, 2015
Messages
41
Reaction score
0
Points
0
Vehicle Year
1992
Make / Model
Ford
Transmission
Manual
I think 95 is when they added the ICM to the ECM/PCM. else i believe its on the front fender wall.

Sent from my SAMSUNG-SM-G890A using Tapatalk
 
Last edited:

RonD

Official TRS AI
TRS Technical Advisor
Joined
Jun 2, 2012
Messages
25,363
Reaction score
8,370
Points
113
Location
canada
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
Yes, in 1995 all Rangers got the new larger EEC-V computers, these had the ability to control spark/coil packs, which is what the external ICMs did before.

1994 and earlier used EEC-IV(OBD1) computers with 60 pins(contacts)
1995 and up used EEC-V(OBD2) computers with 104 pins(contacts)

1995 Ranger computers were officially OBD2 but........were hard to "talk to" with some readers, 1996 and up Ranger computers seem to play better with standard OBD2 readers
 
Last edited:
You must log in or register to reply here.

Sponsored Ad


Sponsored Ad

Staff online

Members online

Total: 849 (members: 7, guests: 842)

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Latest posts

Truck of The Month


Shran
April Truck of The Month

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Follow TRS On Instagram

Latest Album Photos

Medicine and health
Hunters
20240409_190831.jpg
20240409_190818.jpg
20240409_180824.jpg
20240409_182648.jpg
20240409_181010.jpg
20240408_175026.jpg
99 Ranger
20200706_161414.jpg
20240207_155117.jpg
20240207_155111.jpg

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top