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Post by chasebishop88 on Aug 22, 2019 17:54:13 GMT -6
Ok guys went to fire up the car today and and it was shaking worse than ever ( it's always had just a very tiny vibration but i figured it was just the cars engine working ) but it was shaking a lot more than ever I could feel the vibration just sitting there so i opened the hood and the engine was shaking pretty bad so my first guess was motor mount gave out so I had a freind watch it while I revved it up to see if it torqued and he said it just vibrated and so I had him idel it up while I watched and it didn't torque just vibrated but it was the whole motor vibrating
Any ideas or things I could look into ?
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tigger
Administrator 
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Post by tigger on Aug 22, 2019 20:12:50 GMT -6
Spark plugs, spark plug wires, check your coil packs to start...
You're describing a multiple misfire condition. The 4.0 should run smooth as silk, haha.
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RCA1186
Administrator
Rob
Go Pack Go!
Posts: 4,812
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Post by RCA1186 on Aug 23, 2019 7:49:44 GMT -6
Yes it certainly sounds like a misfire condition.
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Post by Toronado3800 on Aug 24, 2019 8:43:26 GMT -6
Ok guys went to fire up the car today and and it was shaking worse than ever ( it's always had just a very tiny vibration but i figured it was just the cars engine working ) but it was shaking a lot more than ever I could feel the vibration just sitting there so i opened the hood and the engine was shaking pretty bad so my first guess was motor mount gave out so I had a freind watch it while I revved it up to see if it torqued and he said it just vibrated and so I had him idel it up while I watched and it didn't torque just vibrated but it was the whole motor vibrating Any ideas or things I could look into ? Any check engine light activity? Mine loves throwing codes so I'd have one by now. My MarkVIII doesn't even like reporting when the alternator has failed so I have to plug in and get a "pending" code sometimes. |
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Post by Marc on Aug 24, 2019 12:26:07 GMT -6
It's got to be misfiring. The check engine light should be on steadily or flashing.
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tigger
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Post by tigger on Aug 26, 2019 16:41:37 GMT -6
Any progress on this over the weekend Chase?
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Post by chasebishop88 on Aug 27, 2019 6:42:22 GMT -6
Well there is no check engine light and my dad dosent think it's a misfire but I dont know what else it could be do you guys know of a way to check without pulling codes
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tigger
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Post by tigger on Aug 27, 2019 16:08:13 GMT -6
...do you guys know of a way to check without pulling codes Infrared (IR) thermal scanner would be the easiest way. Just compare the temp reading of the individual tubes of each exhaust manifolds, a cool tube indicates a misfiring cylinder. Or you could, one at a time, pull a plug wire while the engine is running. If the idle/sound doesn't change, it isn't firing. Why not just pull the codes? |
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Post by chasebishop88 on Aug 29, 2019 5:55:41 GMT -6
Well it dosent have any hard codes I get one every now and then but it goes off shortly after coming on but also its 1995 so it's not ob2 but I looked into it and people were saying its half obd1 half obd2 so you have to have a really special scan tool
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