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Coil corrosion

12/19/2021 21:49
FIRSTLAST
I use Ford E-350 for business. Lost power, bad backfires a couple days back. Engine is 351 Windsor, easy to service. In working through the issue, discovered it was coil to distributor wire. It literally split in two, yet I was running 55 mph to get it to a parking spot back at my business. So maybe a thread held on that long. Now to the question, why did I get corrosion on the coil post. As I borrowed parts off my retired van very close to this one, I saw similar corrosion on that coil post. Rest of wire set seems quite good, and I borrowed the better ignition wire off other van. I never got the older one running after a smelly emissions performance and starving / dying pattern. It would randomly refuse to start at full hot condition, like if the computer had issues. Think it had fuel pressure at the rail (fuel injected). Possibly the little bit of corrosion on coil and coil lead wire was a factor? Plugs were perfect, re-gapped and swapped the coil from the older van. Finish it tomorrow.
12/20/2021 20:53
ASHLEY P
Ford EEC-IV computers are a difficult (IMO) to diagnose. Compared to OBDII computers, they're harder to communicate with and provide less info. For a hot restart issue, add starting fluid to intake to see if the engine runs briefly. If so, fuel supply/injection needs to be tested. If engine does NOT run briefly on starting fluid, check spark. Intermittent hot spark failure can be coil, ignition module, or TFI pickup failure. Good luck.
12/22/2021 23:38
FIRSTLAST
Helpful. Had to go learn about TFI. Looks like I can pull distributor, setup a test with fuel relay removed and coil feed wire off. Watch for spark on a plug I remove for test purposes. Couple things I may have wrong on that setup, need to review the youtube again.
12/23/2021 09:09
ASHLEY P
To test the distributor: just get a new distributor and wire it up, ground it to the engine, and rotate it by hand (with key on) to see if ignition coil fires. (You don't have to take the old one out.)
12/23/2021 15:24
FIRSTLAST
Motor is at its end with that vehicle, but it was strong runner and I have other engines not so good. Like to diagnose the problem so can do a swap if it was just ignition. The steering box at frame rail was down to steel about to completely fail. So I parked it for good. Cost of Iowa salt. You'll never know the cost to vehicle life that road salt takes and the fleet of vehicles you are compelled to own. Ford had stupid design, all frames fail because of how they attached the body to frame.
01/04/2022 19:28
FIRSTLAST
Coil wire had corroded. Swapped coil and lead wire, it runs. Now I am going through and testing for a slipped timing belt. So far, compression test shows all I'm the 150 to 160 area. Worst 150, best 165. Next, tried to setup timing test. Haven't done this engine in long while. A Shunt is to be removed. Did find and disconnect. Next want 10 BTDC. Marked, buy it was looking around 25 BTDC with shunt in. Need a better mark. Can anyone tell me about how many degrees represent 1 notch slip of a belt? I have to mark the wheel better, my old trusty craftsman T.L. had a switch issue Trying out a harbor freight one with degee wheel set on 0.
01/05/2022 09:08
ASHLEY P
There is no timing belt on a 351 Ford. Timing chain. No idea on the timing marks. I would have tested compression by simply listening to the engine crank over. I would set the timing by getting it close and driving it.
01/05/2022 10:04
ASHLEY P
Common sense said this 2 year ago. Are you still a mask mandate commie?
01/05/2022 10:33
FIRSTLAST
N95 good. I wear double cloth, stay 10 foot away. It's worked 2.5 years. I only wear when "near" people, like inside a store. Currently working a project at A Walmart. Starting Friday, I work a tradeshow booth, 10000 visitors in a non Covid year. Probably be lucky to see 5000 this year. If it's in the air, and we know it is, I will get my dosing in.
01/05/2022 11:27
ASHLEY P
But why the forcing of nearly useless masks by _____ ? (Insert "mainstream media" or "leftists" or " Democrats" in the blank) Are they stupid?
01/05/2022 14:11
FIRSTLAST
Underwear is useless. Still use it. Why? The Scots and Indians had a better way? OH YEAH, cause it's not all about ME!
01/05/2022 15:30
ASHLEY P
What do you mean? If a mask DOES work, it doesn't matter if nobody else wears one. Same logic for the "vaccine". If the vaccine really worked, why would any vaccinated person fear an unvaccinated person? Logic > lies about Covid. Logic > fear. Wake up, Firstlast.
01/05/2022 16:33
ASHLEY P
Come on, man! Let's Go Brandon! More votes than Obama? Whatever. *facepalm*
01/07/2022 00:55
FIRSTLAST
try and focus. The car needs some fixing. Affecting me every single day as we car share for now. Worked the timing, pulled shunt, and it is pretty close, about 12 BTDC. Tested vacuum, 16 to 17, so pretty ideal. Compression pretty solid for a older motor. Checked free play in the crank rotation while studying the rotor on the distributor. There is only slight play, very very slight in the timing chain. So I am on to other problems. I had just bought first full tank in long while from a Murphy, used the ethanol blend. I always ran 100% non ethanol as a rule in this vehicle. Doubt that. The clue in the failed main wire from coil to dist, is pointing me to swap plugs and wires. Old motor, but thinking the MSD Street Fire set is worth the money. Plugs only slightly rounded on tips, but the performance even after all this fooling around, is pretty terrible . It is clearly missing and stumbling on any kind of work, like hill at 55 mph. There is even a slight hesitation at idle. Full pedal, you really know it. This E-350 was dang quick off the line just a month back. Hard to beat me off the changing lights. Next, I would need to pull fuel pressure, and go to the pump and filter. Any useable advice, no Brandon jokes please.
01/07/2022 00:58
FIRSTLAST
Forgot, doing this emergency repair work at -4 plus wind chill here. So I had to set up the blast big shop kerosene heater, and overwhelm the bitter cold. Man, wrenching outside sucks big time.
01/07/2022 09:16
ASHLEY P
Lyin' Biden lied. He used a straw man argument and lied about voting....both to make his "election" look legitimate. WHY does he need to do that?????? He's almost as fake as pro wrestling....
01/07/2022 09:29
ASHLEY P
Go back to my first reply in this topic. It likely would be difficult for me to fix that truck if the truck were here in my bay. There's not a way for me to fix it over the keyboard. (BTW, Brandon is no joke. It's a serious problem. lol)
01/07/2022 10:09
ASHLEY P
If you suspect plug wires, test them at night. With engine running, mist water onto the wires. Arcing is bad. Take a fuel sample. I found gas in a diesel yesterday. Added oil to the fuel filter housing and it fired right up.
01/07/2022 10:22
ASHLEY P
I've given you an answer, try answering any of my questions to you.
01/07/2022 10:55
ASHLEY P
Try reading the comment section, and notice how the "dislike" button is disabled. Bias is being called out. MASSES of people do NOT believe the lies from Biden and his supporters in mass media.
01/11/2022 11:04
ASHLEY P
As an example of my frustrations with old Ford EEC computer V8s, today I'm looking at a 1995 E350, 351W. I had the scanner enable the idle speed control function on the truck. It's idling at about 2500 rpm, yet the computer says "idle speed correct".
01/12/2022 00:23
FIRSTLAST
I have something more complex going on with this one. There is just no spark regulation. Did a road trip, it was tough. Suspect crank sensor, or ignition module, but need to run some tests, and use a scope to establish which one is failing. As I thought about this, it occurred that my 93 which had similar gassy odor and horrible running / power before I parked it, had a very similar final day. Another 351 windsor van. Now I'd like to solve this one, see if I can apply info. to the older one. I let these things beat me instead of analytical problem solving. Time to fix that, so I bought an analyzer.
01/12/2022 17:10
FIRSTLAST
What analyzer? Snapon?
01/13/2022 09:13
ASHLEY P
SnapOn. Google Thick Film Ignition and see if your vehicle has that. If there's a remote module, replace it with a KNOWN GOOD one. A "new" part is not KNOWN GOOD.
01/13/2022 21:42
FIRSTLAST
I have a Ford OBD1 Code reader, so best see if it tells me any code. TFI Sounds like the right track. Analyzer should come tomorrow. I have a donor vehicle, can try a swap.
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