I recently started having misfire problems with my 99 Tahoe. I bought it for really cheap because it had what seemed to be a blown head gasket. I replaced the head gasket and intake filters and the misfire went away and for 6 months the check engine light never came back on except for an o2 sensor. So all this was done back in August of 2014.
Now, the other day, I noticed the engine starting to miss again but the engine light did not come on... not for another two days. Now it's missing regularly, runs kinda rough, and blows some white possibly a little bluish smoke out the exhaust after warming up and at an idle. If I drive it, the smoke billows for a little bit and then completely stops but the vehicle still runs very rough. Once it warms up at operating Temps it doesn't smoke for the rest of the day. In fact some days it doesn't smoke at all and just runs rough.
I'm parking the vehicle because I don't want to damage the motor. I've been trying to check for a blown head gasket. So I've done the following.
Changed to oil to check for mixed coolant. It was just black and smelled very strongly of gas.
The smoke out the tail pipe also smells strongly of gas but nothing like coolant.
My coolant levels don't seem to be going down at all.
Before I changed the oil I did have low oil pressure. It kind of seemed this but it did need the oil changed.
I'm curious if this could be a stuck injector leaking gas in to the cylinder or a bad lower intake.
Any help would be very appreciated.
Now, the other day, I noticed the engine starting to miss again but the engine light did not come on... not for another two days. Now it's missing regularly, runs kinda rough, and blows some white possibly a little bluish smoke out the exhaust after warming up and at an idle. If I drive it, the smoke billows for a little bit and then completely stops but the vehicle still runs very rough. Once it warms up at operating Temps it doesn't smoke for the rest of the day. In fact some days it doesn't smoke at all and just runs rough.
I'm parking the vehicle because I don't want to damage the motor. I've been trying to check for a blown head gasket. So I've done the following.
Changed to oil to check for mixed coolant. It was just black and smelled very strongly of gas.
The smoke out the tail pipe also smells strongly of gas but nothing like coolant.
My coolant levels don't seem to be going down at all.
Before I changed the oil I did have low oil pressure. It kind of seemed this but it did need the oil changed.
I'm curious if this could be a stuck injector leaking gas in to the cylinder or a bad lower intake.
Any help would be very appreciated.
