Problem

[ZDaniels]

:confused: I have a problem. I was replaceing the knock sensor on my truck yesterday. I was screwing the old one off and then coolant started coming out from behind it.Is that suppose to happen? I had to put a whole gallon back in the radiator to fill it back up. What could be wrong? The whole problem started with a missfire. I did a tune up on it new plugs and wires. It ran strong for a week then it started it again. Help!

[j894]

Some of them do go into the water jacket (or whatever its called).

What year truck/engine , etc?

[ZDaniels]

I have a 1995 Sonoma. 4.3L V6 CPI.

[j894]

Is it setting any codes?

CPI eer replaced? possibly leaking?

[ZDaniels]

It was setting one code and that was the knock sensor that is why I replaced it. Two weeks ago it had a missfire on cylinder one but I did a tune up (new plugs and wires) on it.It ran great for a week then the problem came back.

[1993blazerlt]

did you check your cap and rotor? Also check all the wires invloving the knock sensor, just becasuse you have a code does not mean it is the sensor itself it could be a wire going to it