|
Tractor Talk Discussion Board |
OT Ford truck misfires
[ Expand ] [ View Replies ] [ Add a Reply ] [ Return to Forum ]
Posted by Steve Crum on August 26, 2006 at 15:19:14 from (4.156.231.5):
Question for you Ford guys that know what your talking about. (GM my strong suit). I have an 89' F-150 with the 5.0 FI engine. This has the TFI-IV ignition. About a year ago the module on the outside of the distributor went bad and I replaced it and retimed the engine and it ran strong and didn't miss a beat. Then after a few months it started an irratic misfire at most engine speeds. I replaced the plugs, wires, cap, rotor and coil it ran better but the pesky misfire is still there. I tried wiggling the distributor shaft to see if I noticed any bushing wear and it seems tight without a lot of up and down movement.
I put a timing light on it and watched the timing mark as the truck idled, The mark varies a few degrees. When I watch the light it intermittantly misses a blink and I notice a slight stumble from the engine. I tried several plug wires with the same result. The truck has 195,000 miles on it and the engine about 70,000 since a rebuild but I imagine the distributor is untouched original. Doe's this sound like a good candidate for a rebuilt distributor with a new module? My other question is the condenser mounted next to the coil, what is the purpose of this? I assume it's part of the ignition, could this be the misfire problem? Reason I ask is I've never seen a condenser on a GM HEI, but I know an iffy condenser will drive you crazy trying to fix a misfire on a point ignition system. Opinions please.
Replies:
Home
| Forums
Today's Featured Article -
Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
Copyright © 1997-2025 Yesterday's Tractor Co.
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V. Yesterday's Tractors - Antique Tractor HeadquartersWebsite Accessibility Policy |
|
