1999 Chevy Suburban my car shakes

RACSO234

MEMBER
1999 CHEVROLET SUBURBAN
V8
4WD
AUTOMATIC
180,000 MILES

I just wanted to know why my car shakes every time I accelerate but this does not happen all the times only when I press the gas and every time I go up on a hill the car start shaking and it feels like its gonna turn off I have already change the spark plugs, the spark plugs cables and I check the cable diagram already, but I notice something on the psark plugs duh two of them were crack and I have change them but the car keeps doing the same thing. Please help me?

Wednesday, November 12th, 2008 AT 9:15 AM

1 Reply

JACOBANDNICKOLAS

MECHANIC
110,176 POSTS

Hi:
Based on what you're saying, it sounds like an engine miss. Are you sure that the plug wires are on correctly? Also, the two cracked plugs have me concerned. After you replaced them, were they ok? Also, when the car is at an idle, does it miss? If so, try the old way of finding a miss. Carefully remove one spark plug wire at a time to see if the engine misses more. If it runs worse, replace the plug wire because that cylender is firing. If you find that a plug wire makes no change when the wire is removed, it isn't firing.

Let me know what you find, and make sure not to get shocked when removing the wires.

Joe

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Wednesday, November 12th, 2008 AT 4:45 PM