fuel or ignition?
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New User
Joined: Dec 2004
Posts: 24
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fuel or ignition?
A buddy has a 1995 F-150 4x4 with a fuel injected 351. He's had a problem with the truck missing, sputtering and losing power momentarily, then running fine. When it happens, the tach goes to zero, then back to reading. I'm thinking ignition, but I hate to get start throwing parts at it. It has 130,000 miles on it, and I think all the ignition parts are original. Any ideas?
Senior User
Joined: Sep 2005
Posts: 357
Likes: 1
Alternator? We used to have a 
Sunfire
, and I had the alternator go bad on me one day
. The CD player kept stopping
and all the lights were flashing. Niether the spedo or the tach were functioning correctly. I doubt it's the problem, but since I know very little about the ignition, its just a guess, but at least you can get tested and it won't cost any money before you try buying parts.
Sunfire, and I had the alternator go bad on me one day. The CD player kept stopping and all the lights were flashing. Niether the spedo or the tach were functioning correctly. I doubt it's the problem, but since I know very little about the ignition, its just a guess, but at least you can get tested and it won't cost any money before you try buying parts.
Postmaster
Joined: Aug 2004
Posts: 2,908
Likes: 2
From: West Mansfield, Ohio
Wheres fredric when you need him? Hes the electronics genious here...
ANYWAYS...
The tach dropping to 0 gives us an indication that something is going wrong with the ICM (I think....) which is the ignition control module. I THINK that it controls the tach and all that stuff. I've never had that problem with my truck, but it's something to think about.
ANYWAYS...
The tach dropping to 0 gives us an indication that something is going wrong with the ICM (I think....) which is the ignition control module. I THINK that it controls the tach and all that stuff. I've never had that problem with my truck, but it's something to think about.
Senior User
Joined: Nov 2003
Posts: 107
Likes: 0
From: Chillicothe OH
When my ICM/coil went bad, it only acted up when the truck was warmed up. Over time, it would just die until the truck cooled off a bit. The replacement price for both was less than $100 and well worth the relief in frustration.
