Question about 1998 Ford F150 Regular Cab

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My 98 F150 6 cylinder has started using coolant but I can't find a leak or anything. The engine light came on and it doesn't want to idle. The RPMs just drop down and the engine shakes the entire truck and sometimes dies. Any idea on what could be causing this. I took it to Auto Zone and had them run the codes and it came back with one code?? and several possible causes for that code.

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Are you getting a sweet-smelling and white exhaust too? What you describe is due to a failed head gasket. Coolant is leaking into the cylinders and causing the bad idle (coolant isn't combustable).

Take it to a shop to get a compression check on your cylinders - you'll see one or two of them much lower than the others. Replace the head gasket and you'll be set.

Posted on Jul 09, 2010

Testimonial: "Thanks very much. I figured that the coolant loss was due to a head gasket but didn't think about it causing the bad idle. Any idea on an estimate for repair cost? THANKS"

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