Join Date: Aug 2010
Location: Richmond Hill, Ontario
iTrader: 0 reviews
check the fuel pressure, you can use a scan tool to see, should be 40psi at idle.
sounds like a misfire to me, but instead of throwing parts at the car, i would:
Leak down test
check plugs, check coils, check the boots for cracks on the coils
check for vacuum leaks, could be a cracked intake manifold, or intake manifold gasket.
I don't think it's fuel related, as it seems more temp. related.
misfires dont' always set the engine light, I'm thinking you have a misfire from either plugs, coils, or intake manifold/gasket.