I've got a 1994 E150 high top conversion van, with 153K that I'll be selling soon, but need to use a bit before that. It's been gutted into a work van. I've had it a bit over 2 years and it's been pretty reliable overall, with just some minor issues. Recently it died at a gas station and I replaced the fender mounted ICM with a Motorcraft one and with actual heat paste, not silicone grease. It ran normally after that. The day before yesterday, it took a few cranks to start, which is unusual. Normally it fires up on the first crank or so. Yesterday it refused to start. Cranked perfectly, but nothing else. I disconnected the key chime to listen for relays clicking when turning the key on, but heard nothing. I checked all the fuses and nothing was blown or melted. I swapped around the 3 matching relays and nothing changed. Starting fluid confirms lack of spark. Unless it's a wiring issue, I think it can be narrowed down to just a few things, unless I'm missing something.
1) Ignition switch, the electrical part. The plastic push rod thing seems good and fully travels forwards. The OEM switch isn't burned or smells, but the post doesn't move as freely as I'd like. I'll be replacing this ASAP, even though I kind of doubt this is the issue.
2) ICM, which is a brand new Motorcraft with real heat paste on it. Not sure on this one.
3) PCM ( engine computer brain ) relay, which I swapped around. It's OEM. I'll replace it ASAP.
4) PCM ( brain ) looks good, including inside. It's OEM without any signs of burning, smells or corrosion. I'm thinking of buying a rebuilt one.
5) CPS ( cam sensor in the dist ), which seems doubtful. You'd think it'll still fire up, just run bad.
6) Distributor. I haven't checked to see if the rotor turns and what the cap and rotor looks like. Supposedly the timing chain was replaced by the PO. I did get some parts receipts from him including the timing chain stuff.
7) Coil. I haven't tested it for voltage or resistance yet.
Any ideas?
1) Ignition switch, the electrical part. The plastic push rod thing seems good and fully travels forwards. The OEM switch isn't burned or smells, but the post doesn't move as freely as I'd like. I'll be replacing this ASAP, even though I kind of doubt this is the issue.
2) ICM, which is a brand new Motorcraft with real heat paste on it. Not sure on this one.
3) PCM ( engine computer brain ) relay, which I swapped around. It's OEM. I'll replace it ASAP.
4) PCM ( brain ) looks good, including inside. It's OEM without any signs of burning, smells or corrosion. I'm thinking of buying a rebuilt one.
5) CPS ( cam sensor in the dist ), which seems doubtful. You'd think it'll still fire up, just run bad.
6) Distributor. I haven't checked to see if the rotor turns and what the cap and rotor looks like. Supposedly the timing chain was replaced by the PO. I did get some parts receipts from him including the timing chain stuff.
7) Coil. I haven't tested it for voltage or resistance yet.
Any ideas?
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