Is this the 3.8 or the 3.4 engine?
Are you losing any coolant or having to add any?
Both of these engine have had an intake problem. The intake itself on the 3.8 and the gasket on the 3.4.
I asked about the heat (from the blower motor-my fault) as it sounded like a stuck thermostat. Being in the warmer climates, I wouldn't expect it be that radical.
Codes may really be helpful.
why would it start off running fine and then get worse and then get better?
IF the engine is hot when you park it, the coolant the came into the engine may evaporate, so it starts okay, but starts leaking back in and has a problem dissapaited it until it gets hot again. This would be more of the 3.8 problem I would think.
If there has been no coolant loss, it may still be an air leak from the lower intake manifold gasket. Sometimes you can flush it out with carb cleaner around the intake gasket area. There may be temperature changes causing expansion and contraction that may seal it at some points. This is more typical or the 3.4
Autozone may be able to read the codes so we can do some testing, I am also suspicious of a MAF sesnor problem.
Wednesday, March 26th, 2008 AT 9:13 AM