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  • November 21, 2024, 07:50:34 AM

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Author Topic: odd running problem  (Read 8659 times)

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Offline maddog

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odd running problem
« on: December 12, 2017, 01:15:05 AM »
I'm having an odd issue with the engine in Eagle Eyes. It starts no problem but once running it sounds like it's missing and runs really rough to the point that the car shakes while in gear, the shaking gets worse the higher the engine revs. I've changed the plugs, wires and rotor. The cap looks like it's still good, I do have another cap on the way just in case, but I would like to hear what you all think it might be. Oh I did look at the harmonic balancer while the engine was running but it didn't look like there was any unusual movement coming from it.
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1998 CHEVY S10 (DAILY DRIVER/PROJECT) INTIMIDATIN'
1980 AMC EAGLE WAGON (PROJECT) EAGLE EYES
http://forums.amceaglesden.com/index.php?topic=30758.0
1983 AMC EAGLE LIMITED WAGON-SURVIVOR (gone)
http://forums.amceaglesden.com/index.php?topic=32372.0

Offline maddog

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Re: odd running problem
« Reply #1 on: December 13, 2017, 11:29:50 AM »
well I put the new cap on and it didn't change anything. I did find an odd squealing sound that after some investigating is coming from the harmonic balancer, so it looks like I need a new one. i do have one question though will the balancer from a 4.0 work on a 4.2 because if so that would help a lot.
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1998 CHEVY S10 (DAILY DRIVER/PROJECT) INTIMIDATIN'
1980 AMC EAGLE WAGON (PROJECT) EAGLE EYES
http://forums.amceaglesden.com/index.php?topic=30758.0
1983 AMC EAGLE LIMITED WAGON-SURVIVOR (gone)
http://forums.amceaglesden.com/index.php?topic=32372.0

Offline maddog

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Re: odd running problem
« Reply #2 on: December 18, 2017, 08:38:50 PM »
well I have replaced the harmonic balancer and it didn't help much more than to stop the engine from shaking really bad. I have replaced the plugs, wires, cap, and rotor as well as reset the timing and it is still missing, any help would be greatly appreciated. FYI this is my only car and I need it to go job hunting seeing as I got let go from my job.
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1998 CHEVY S10 (DAILY DRIVER/PROJECT) INTIMIDATIN'
1980 AMC EAGLE WAGON (PROJECT) EAGLE EYES
http://forums.amceaglesden.com/index.php?topic=30758.0
1983 AMC EAGLE LIMITED WAGON-SURVIVOR (gone)
http://forums.amceaglesden.com/index.php?topic=32372.0

Offline amcfool1

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Re: odd running problem
« Reply #3 on: December 18, 2017, 11:47:38 PM »
 hi, are the plug wires in the correct order? bad motor mount? good luck, gz
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Offline maddog

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Re: odd running problem
« Reply #4 on: December 19, 2017, 12:05:02 AM »
i had those thoughts myself but the wires are in the correct order and both mounts look to be in good shape. I'm starting to think it is being caused by the engine restore I put in it.
« Last Edit: December 19, 2017, 12:07:53 AM by maddog »
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1998 CHEVY S10 (DAILY DRIVER/PROJECT) INTIMIDATIN'
1980 AMC EAGLE WAGON (PROJECT) EAGLE EYES
http://forums.amceaglesden.com/index.php?topic=30758.0
1983 AMC EAGLE LIMITED WAGON-SURVIVOR (gone)
http://forums.amceaglesden.com/index.php?topic=32372.0

Offline hillbilly

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Re: odd running problem
« Reply #5 on: December 19, 2017, 05:14:50 PM »
I had the same problem a couple months ago, turned out to be a weak coil.
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Offline maddog

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Re: odd running problem
« Reply #6 on: December 19, 2017, 07:23:58 PM »
i don't know how often coils go out but I know mine is only a few years old so it should still be good.
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1998 CHEVY S10 (DAILY DRIVER/PROJECT) INTIMIDATIN'
1980 AMC EAGLE WAGON (PROJECT) EAGLE EYES
http://forums.amceaglesden.com/index.php?topic=30758.0
1983 AMC EAGLE LIMITED WAGON-SURVIVOR (gone)
http://forums.amceaglesden.com/index.php?topic=32372.0

Offline mudkicker715

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Re: odd running problem
« Reply #7 on: December 19, 2017, 10:11:22 PM »
Coils can be checked, via resistance. Google that as i forget exacts. Anyway a couple years back i put an amc branded coil on my wheelhorse (yard tractor) it bit the bullet as in completely done. Newish coil and fire in the hole. Could be a coil on the Fritz.
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Manitowoc WI

Offline maddog

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Re: odd running problem
« Reply #8 on: December 20, 2017, 12:41:42 AM »
ok I wasn't entirely sure if it could be checked or not, I will have to do that tomorrow when it is light out and not to mention a whole lot warmer. Oh a buddy of mine suggested checking the egr valve, where exactly is it located.
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1998 CHEVY S10 (DAILY DRIVER/PROJECT) INTIMIDATIN'
1980 AMC EAGLE WAGON (PROJECT) EAGLE EYES
http://forums.amceaglesden.com/index.php?topic=30758.0
1983 AMC EAGLE LIMITED WAGON-SURVIVOR (gone)
http://forums.amceaglesden.com/index.php?topic=32372.0

Offline amcfool1

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Re: odd running problem
« Reply #9 on: December 20, 2017, 07:16:17 AM »
egr is on intake, below carb. check all vacuum  connections. btw, does engine shake at all times, or only in gear? It may be trans. problem.
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Offline maddog

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Re: odd running problem
« Reply #10 on: December 20, 2017, 08:35:59 AM »
at all times and it gets more intense the higher the engine revs whether in gear or not.
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1998 CHEVY S10 (DAILY DRIVER/PROJECT) INTIMIDATIN'
1980 AMC EAGLE WAGON (PROJECT) EAGLE EYES
http://forums.amceaglesden.com/index.php?topic=30758.0
1983 AMC EAGLE LIMITED WAGON-SURVIVOR (gone)
http://forums.amceaglesden.com/index.php?topic=32372.0

Offline maddog

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Re: odd running problem
« Reply #11 on: December 21, 2017, 12:17:57 AM »
well I checked the EGR valve and it's working properly also there was very little carbon buildup on it. I cleaned it up none the less and I am still having the same problem.
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1998 CHEVY S10 (DAILY DRIVER/PROJECT) INTIMIDATIN'
1980 AMC EAGLE WAGON (PROJECT) EAGLE EYES
http://forums.amceaglesden.com/index.php?topic=30758.0
1983 AMC EAGLE LIMITED WAGON-SURVIVOR (gone)
http://forums.amceaglesden.com/index.php?topic=32372.0

Offline mo.eagles

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Re: odd running problem
« Reply #12 on: December 21, 2017, 05:14:05 PM »
Do you have a plugged cat.? Have you done a compression test?
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Offline mudkicker715

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Re: odd running problem
« Reply #13 on: December 21, 2017, 08:37:43 PM »
My thoughts on a plugged cat are that you lose power. Not a shakey motor.  Maybe check resistance on plug wires as well as compression test as mentioned.
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Manitowoc WI

Offline maddog

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Re: odd running problem
« Reply #14 on: December 21, 2017, 11:57:48 PM »
I don't have a cat on my Eagle. I replaced the plug wires as for doing a compression test I don't have the money to get a tester.
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1998 CHEVY S10 (DAILY DRIVER/PROJECT) INTIMIDATIN'
1980 AMC EAGLE WAGON (PROJECT) EAGLE EYES
http://forums.amceaglesden.com/index.php?topic=30758.0
1983 AMC EAGLE LIMITED WAGON-SURVIVOR (gone)
http://forums.amceaglesden.com/index.php?topic=32372.0
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