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post #1 of (permalink) Old 11-28-2001, 08:11 PM
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missing?

Hey all, whats up. When i slowly accelerate usually around 30-35 mph when my truck has dropped into overdrive already the engine feels like its missing pretty badly till i give it more gas or downshift. It only happens around these low rpm's when it's under more load i guess. the whole car will shake like you hit a bump. anyways, i'm planning on changing the cap and rotor soon because the cap looked corroded, but i was wondering what else this could be. if it's not the cap i wouldnt be too sure cause ive changed spark plugs and wires recently, and have a new exhaust also. thanks for any help

kyle

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post #2 of (permalink) Old 11-29-2001, 12:14 AM
 
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Re: missing?

You're on the right trail

checking the ignition parts. Don't discount a filthy fuel filter either.

Malcolm

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post #3 of (permalink) Old 11-29-2001, 07:08 AM
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Re: missing

Check the ignition timing,too.



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post #4 of (permalink) Old 11-29-2001, 09:27 PM
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Re: missing

thanks for the input, changed the fuel filter a couple weeks ago, that made a difference on performance and gas mileage i was suprised. changed cap and rotor today and it seemed to be better when i drove it but i didnt have much time to get it warmed up and in traffic when it really starts actin weird. i hope this was the problem but if it isnt you'll hear from me. thanx

post #5 of (permalink) Old 11-29-2001, 11:12 PM
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Re: missing

While we are on the subject, mine is missing too, except around 60-65 and sometimes 55, but those are the only speeds. I have a new cap and rotor, plugs, wires, fuel filter, air filter blah blah blah, and the timing is right on the money. What in the freakin heck could it be? It is starting to annoy me[img]/wwwthreads_images/icons/mad.gif[/img] Please help

Tom

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post #6 of (permalink) Old 11-30-2001, 01:08 AM
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Re: missing

If it's EFI, it could be the TFI on the side of the dist, or the PIP inside. I had a speed-sensitive miss for a while - turned out I had let the plugs burn to 0.14" [img]/wwwthreads_images/icons/frown.gif[/img](they're supposed to be 0.044"[img]/wwwthreads_images/icons/wink.gif[/img]).


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post #7 of (permalink) Old 12-01-2001, 07:21 PM
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Re: missing

What would be the approx. cost/workmanship required for thos two?

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Tom

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post #8 of (permalink) Old 12-02-2001, 02:45 AM
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Re: missing

The ignition module is around $30 (I think) and requires a special "Ford TFI"-only thin-walled socket to remove the screws. But the tool only costs about $4 from Lisle or CarQuest (also the Lisle but packaged for CQ). It only takes a minute to pull the 2 screws, slide it down & out of the dist., unplug the connector, smear grease on the back of the new one, slide it up into the dist., put the screws back, & plug it up.

The PIP is inside the dist. & requires disassembling the dist completely to replace. It costs about $30, but a reman dist is only about $90 so it's worth it to me to replace the whole thing & have a lifetime warranty on it. Either way, you have to restab the distributor.

The Haynes manual ($12) gives procedures for diagnosing them both, so that's what I'd recommend for you before you start throwing part$ into it.


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post #9 of (permalink) Old 12-02-2001, 11:30 PM
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Re: missing

If I can trade my truck then I won't worry about it, but in a week or so I will probably end up doing it, module first...

Tom

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post #10 of (permalink) Old 12-03-2001, 04:25 AM
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Re: missing?

I just installed the MSD Ignition System in my 94 Bronco (more info and pics coming soon) and I'm glad I noticed a sticker in the engine compartment stating that the plug wires had to be routed a certain way to avoid misfires or causing another wire to fire. Just a thought but maybe check to see if all wires r routed correctly.

MIKE

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