shuddering...
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Junior User
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shuddering...
i havent had any problems with my 300 except when i went to crank it today it started and all but it shook the entire truck pretty bad and i dont have a clue what it could be...anybody know? i do need to change the oil probably though since gramps probably didnt lol...is that it?
Fleet Owner
Joined: Sep 2005
Posts: 28,609
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From: Lake Tahoe, Nevada
Just remove the plugs and examine them.
If all is well they should have a uniform light tan color.
Since it was shuddering, it sounds like a misfire and the color can help you determine the cause. Post back with your results.
Did it smooth out after it ran a little while?
If all is well they should have a uniform light tan color.
Since it was shuddering, it sounds like a misfire and the color can help you determine the cause. Post back with your results.
Did it smooth out after it ran a little while?
Fleet Owner
Joined: Sep 2005
Posts: 28,609
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From: Lake Tahoe, Nevada
We don't have much to go on. Looking at the plugs is to try to see what's wrong. If they are the same, if you have a rich (black) or lean (white) condition. The plugs rarely go that bad suddenly unless something broke.
The backfire is new information, was it through the intake or the exhaust?
Look carefully at all the hoses connected to the intake to see if any have come off or broken.
The backfire is new information, was it through the intake or the exhaust?
Look carefully at all the hoses connected to the intake to see if any have come off or broken.
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Junior User
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ok so i took the wires off the end of the plugs and everything looks fine but i started it again and every time it fires it sounds like its spitting something and my oil is getting kinda chunky
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Post Fiend
Joined: Jul 2004
Posts: 8,786
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From: Northern California
You need to remove the plugs from the engine and look at the firing end.
A slight brownish to grayish tan tent to them is normal.
Ash deposits, light brown, almost white deposits encrusted on the plugs. suggests new valve guides are needed
Black is rich, or oily deposits. suggests new valve guides or rings are needed, or the fuel mixture is off.
..........
Your oil is getting chunky? Is it tuning white? metal lumps?
A slight brownish to grayish tan tent to them is normal.
Ash deposits, light brown, almost white deposits encrusted on the plugs. suggests new valve guides are needed
Black is rich, or oily deposits. suggests new valve guides or rings are needed, or the fuel mixture is off.
..........
Your oil is getting chunky? Is it tuning white? metal lumps?
Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
I would definatley change the oil, and possibly have it tested.
Metal lumps suggest mechanical damage inside the engine of some kind.
If you have a Computer. Run the codes.
It could be a sticky EGR perhaps, or a faulty Ported Vacuum switch.
At least the plugs are normal, thats a good sign at least.
Metal lumps suggest mechanical damage inside the engine of some kind.
If you have a Computer. Run the codes.
It could be a sticky EGR perhaps, or a faulty Ported Vacuum switch.
At least the plugs are normal, thats a good sign at least.
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Junior User
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Originally Posted by 81-F-150-Explorer
I would definatley change the oil, and possibly have it tested.
Metal lumps suggest mechanical damage inside the engine of some kind.
If you have a Computer. Run the codes.
It could be a sticky EGR perhaps, or a faulty Ported Vacuum switch.
At least the plugs are normal, thats a good sign at least.
Metal lumps suggest mechanical damage inside the engine of some kind.
If you have a Computer. Run the codes.
It could be a sticky EGR perhaps, or a faulty Ported Vacuum switch.
At least the plugs are normal, thats a good sign at least.
i was really glag that they were good...and im sure my grandpa hadnt changed the oil in a while so thats on my to do list for tomorrow morning
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