• 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.

94 4.0 won't start very intermittent spark


9440a4ld

New Member
Joined
Sep 1, 2014
Messages
1
Reaction score
0
Points
0
Vehicle Year
1994
Make / Model
Ford
Transmission
Automatic
I'm kind of at a loss, I have a 1994 Ranger 4.0 4x2 that has been in the family since new.

It had some issues, and sat in the garage for a while. The battery died, and I used the "start" feature on my cheapie Harbor Freight battery charger to jump it. Well the truck never started after that, so I decided to let the battery charge for a few hours and try again. It still wouldn't start, so I grabbed one of the plug wires, yanked it off, put a clean plug in it and checked for spark. there was no spark.... Checked the other wires, same thing.


Unfortunately, using the start feature fried the powertrain control module. I threw parts at it hoping to resolve the issue.

Ignition control module
Powertrain control module
Coil pack
checked all fuses and relays.

all seems to be ok.

Now there is very intermittent spark. There's no specific sequence in the irraddic spark that I am receiving when trying to start the truck. Do any of you fine people have any ideas?
 


disciplerocks

July 2011 OTOTM Winner
V8 Engine Swap
OTOTM Winner
Solid Axle Swap
TRS Banner 2012-2015
Joined
May 27, 2010
Messages
4,522
Reaction score
53
Points
48
Location
Evansville, IN
Vehicle Year
1989
Make / Model
Ford
Engine Size
4.0
Transmission
Automatic
Subscribing.
 

Rowdy Fitzgerald

Hog hunter
Firefighter
EMT / Paramedic
V8 Engine Swap
OTOTM Winner
Solid Axle Swap
Joined
Aug 29, 2008
Messages
2,271
Reaction score
372
Points
113
Location
Nevada
Vehicle Year
1987, 1989
Make / Model
Ford
Engine Type
V8
Engine Size
5.0,4.0
Transmission
Manual
2WD / 4WD
Solid Axle Swap 4x4
Total Lift
6”
Tire Size
35
Did you replace the battery? It could be producing just enough power to turn everything on but not make it run.
How well does it turn over?


Sent from my iPhone using Tapatalk
 

joescool2008

New Member
Joined
May 26, 2011
Messages
25
Reaction score
0
Points
0
Vehicle Year
1994
Make / Model
Ford
Engine Size
4.0L OHV V6
Transmission
Manual
Crankshaft position sensor would be my bet. Tells the engine when to fire.
 

disciplerocks

July 2011 OTOTM Winner
V8 Engine Swap
OTOTM Winner
Solid Axle Swap
TRS Banner 2012-2015
Joined
May 27, 2010
Messages
4,522
Reaction score
53
Points
48
Location
Evansville, IN
Vehicle Year
1989
Make / Model
Ford
Engine Size
4.0
Transmission
Automatic
He has already replaced it
 

cp2295

Active Member
Joined
Jul 25, 2013
Messages
1,027
Reaction score
7
Points
38
Location
Washougal, wa
Vehicle Year
1999
Make / Model
Ford
Engine Size
4.0L swap, 8.8 explorer axle, IFS front end
Transmission
Manual
My credo
If you ain't first you're last
Cmp also provides spark timing but I thought it mainly provides fuel timing so probably not that, crank sensor absolutely provides spark so I'd double check that, make sure the wires aren't screwed on that, you got new plug wires correct? You're getting fuel right? So it all comes down to spark being the issue right?
 

Sponsored Ad


Sponsored Ad

Staff online

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.

Truck of The Month


Kirby N.
March Truck of The Month

Recently Featured

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

Follow TRS On Instagram

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top