98 Monte Carlo Z34 Cant find coolant leak

[JWILL1015]

Its was leaking alittle coolant, was told by the auto store to change my Temp sending unit. After changing that it got worse, now leaks alot of coolant. Cant see any sign of a leak anywhere. I even check for signs of a blown head or gasket and no coolant in oil, or coolant coming out tail pipe. Heater core is good.... I read some have upper air intake problems which my cause coolant lose. I checked the filter its looks brand new. The plugs looks fine has alittle electrical tape on it, not sure if its been replaced or what. Some guy recommended a high flow air filter, not sure if that would make a difference. Cylinders are mis firing really bad, but coil packs are good. Cahnged spark plugs and wasnt mis firing for a day or two then started again... Im stumped!!!

[z34montegirl]

Originally Posted by JWILL1015

Its was leaking alittle coolant, was told by the auto store to change my Temp sending unit. After changing that it got worse, now leaks alot of coolant. Cant see any sign of a leak anywhere. I even check for signs of a blown head or gasket and no coolant in oil, or coolant coming out tail pipe. Heater core is good.... I read some have upper air intake problems which my cause coolant lose. I checked the filter its looks brand new. The plugs looks fine has alittle electrical tape on it, not sure if its been replaced or what. Some guy recommended a high flow air filter, not sure if that would make a difference. Cylinders are mis firing really bad, but coil packs are good. Cahnged spark plugs and wasnt mis firing for a day or two then started again... Im stumped!!!

Have you checked your water pump? That is what is wrong with mine and I am also using coolant. Good luck.