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3.8 Essex. Ongoing issue when car is well warmed up, or a restart after a quick stop. Take off from a dead stop, hardly any power. Noticeable lack of power on inclines. Straightens out a bit after driving it for a while, but still less power than when cold. No check engine light. Also notice temp gauge goes to 3/4 under moderate to heavy load, will drop and stay 1/4 to 1/2 on flat surfaces. Almost quit on me the other day, popped and stumbled for just a few seconds, then resumed to a normal condition. I`ve replaced virtually everything, total tune up, brand new intake manifold, and F.I. seal kit. New radiator and thermostat. I`ve also replaced the TPS sensor, MAF sensor, both oxygen sensors, and fuel filter. Reset the PCM afterwards. I purchased a new fuel pump, and will try that next, although it`s not noisy. In my experience, electric fuel pumps either work, or they don`t. Any other ideas?
Nope, acted up again yesterday on a 95 degree day. Stopped at a store for 15 min, went back out, and it barely would go at the stoplight. Floored it, you could feel the hesitation holding it back, like a sputter. It sometimes will break free and take off, but never like when it`s cold. Temp runs 3/4 at idle, and in traffic. It gets up above 120 degrees here in the summer, probably will overheat by then. Tired of throwing money at it. Only thing left is maybe a weak/failing head gasket, and I think they are getting tired of me at the apt complex doing major auto repairs in the parking lot Might be time to move on to a newer model with the 3.0.