Check airflow meter isn't sticking
SOURCE: 1998 BMW Z3 2.8 Idles rough when cold starting in wet weather
the problem could be in air mass flow sensor, but it's expensive
SOURCE: 1998 Jeep Grand Cherokee has a rough idle at first
You do have a filter and it's mounted right on top of the pump on outside of tank...it is also the pressure regulator. You really should put a pressure gauge on the fuel system and check it out though. you may find there is a problem elsewhere. Good and proper testing is the only way to get answers about problems especially now that systems are all electronically controlled.
SOURCE: rough idle and poor start ups in cold weather what
You will need to make sure that the health of the car is good. Make sure that the fuel , fuel filter and the delivery is good.
Secondly check the spark intensity, check the plugs, the wires and trigger for the coils. make sure all electrical points are tight and clean so as the starter cranks without any lagging.
Finally check the plug gaps, the timing and fuel tuning.( hope the valve settings are good)
SOURCE: I have 2002 chevy avalanche,
Mine did the same thing...at 42F degrees, run bad. After it warm up, it would be fine. This would only happen in the winter. It would throw a code saying it was lean in Bank 1 or 2.
The issue is a contraction of the intake gasket due to the cold weather, when it contracts, it leaks air. There is a new, improved gasket now from GM, or get a Felpro from major auto stores and it will work fine. I consistently had the problem every winter, and this has fixed the problem for the last 3-4 years.
SOURCE: Jeep grand cherokee choking problem after a few minutes.
Check your idle air control valve. Sounds as though it may be the problem. The other item could be the TPS, but I doubt it because it would idle poorly all the time even after warming up.
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