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post #1 of (permalink) Old 01-04-2002, 07:10 PM Thread Starter
 
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Engine Shakes

My engine shakes quite good. I replaced the motor mounts and the thing still shakes. No fault codes. Any suggestions? I'm thinking maybe the spark plugs or wires. Am I over looking anything obvious?


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post #2 of (permalink) Old 01-04-2002, 07:12 PM
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Re: Engine Shakes

you say it shakes, but how is it running? at idle?

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post #3 of (permalink) Old 01-04-2002, 07:19 PM Thread Starter
 
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Re: Engine Shakes

Shake is most noticeable at idle. When I get going it stutters at low RPMs. At first I thought it was an exhaust leak because the sound is much different now. Went to exhaust shop, they said there wasn't a leak. The sound is like a sputter. Seems like a cyclinder might not be getting spark or something. There is a lost of power which again makes me think I'm only running 7 cyclinders. I'm betting on the spark plugs and wires, but I could be wrong.


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post #4 of (permalink) Old 01-04-2002, 08:02 PM
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Re: Engine Shakes

Definitely sounds like a dead cylinder----wires, plugs, youre on the right track....

Just DONT waste youre money on those Ford Racing 9mm wires, they BLOW!!!!!!!

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post #5 of (permalink) Old 01-04-2002, 08:02 PM
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Re: Engine Shakes

Definitely sounds like a dead cylinder----wires, plugs, youre on the right track....

Just DONT waste youre money on those Ford Racing 9mm wires, they BLOW!!!!!!!

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post #6 of (permalink) Old 01-05-2002, 01:21 AM Thread Starter
 
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Re: Engine Shakes

Well I'll check the plugs and then ditch the Motorsport wires.


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post #7 of (permalink) Old 01-05-2002, 08:03 AM
 
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Re: Engine Shakes

try pulling the plug wire one at a time and staarting the truck. if you pull number one and the truck doesn't change then you have found the bad boy. If all of them make a change then look somewhere else.

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post #8 of (permalink) Old 01-05-2002, 02:17 PM Thread Starter
 
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Re: Engine Shakes

Good idea, thanks havack. I'll try pulling some wires, but if that doesn't work do you think a blown valve could cause missing? I haven't been running a muffler and now everyone is telling me that I might have blown a valve. This would have been good during the summer time when I have time to swap a 351 or 460, but I have to head back to school tomorrow so its very ill timing. I really need my truck at school, because I hate walking half a mile with my laundry... haha. Please be nothing internal!!!


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post #9 of (permalink) Old 01-05-2002, 03:35 PM
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Re: Engine Shakes

Put a vacuum guage on it to check for a burnt valve, thats an easy check. If the guage reads erratic, drops, or just dont hold good vacuum at idle, then you`ll have to dig deeper.

Although i have seen many 4.9s and 5.8s with burn`t exhaust valves and/or seats, its very rare for a 5.0 to burn them for some reason, from what * i * had experienced anyways working in machine shops over the years...

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post #10 of (permalink) Old 01-05-2002, 03:42 PM
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Re: Engine Shakes

Try taking out all the plugs, keep them in order. Look at them and see if one is all wet or dark and the others look like their burning. Do a compression check.

First do the vacuum test like Broncomania suggested.

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