Hey guys I recently did some work to my car heads, intake, cam, lt headers and some other little things. Here is my problem every so often the car will stumble, or miss . Here is my theory I have topped off my coolant several times after the work and it is low again I think that it is leaking into the engine and burning off during combustion most of the time or creating a miss fire when to much.. also we just had a very nice day out and no cars were smoking from the exhaust except mine a steamy white smoke which futher leads me to this conclusion.. Thanks for your help

 

Your theory is probably correct. Look at the plugs. Ones burning coolant will usually be cleaner and a lighter color.

 

yeah i pulled a couple and they were a whiteish burn to them ... they should be more tan in color right ?

 

As rich as the LT1 runs, they are usually quite grey (more on the darker side of the spectrum). You might pull a few more to compare.

 

thanks for the help

 

i pulled all the plugs except 1,7 and 8 and they all had same color "whiteish" if thats a color ... do you think its possible it could be one of the three i didn't pull ? or maybe the color i'm observing is from small leakage into them all... my thought is there is no leakage on the ground so it has to be...

 

Have you checked the oil for coolant? Is there oil in the coolant? Have you pressure tested the cooling system? Can you do a leak down test? All these can help you determine where the leak is occuring.

 

Thanks to all for comments and help...today i had the cooling system pressure tested and there was a drop in pressure also the guy agreed there was a detection in the exhaust as well..thanks again