Hesitation in acceleration

[gmyoyo]

Well, typically it seems to only begin to occur after the car has warmed up. Once it's warmed, I start to just every now and then feel a jerk, or miss feeling, when at cruise speed. Can't 'kick it' when cruising and wanting to accelerate because it causes a sputtering, but it does increase speed, it just doesn't feel heatlhy the way it's supposed to. Other times it goes, but you can definitely feel the sputtering/missing. Then you start to feel a little miss when sitting at a stop sign or such. Try to accelerate from stopping and I get that hesitation/sputtering while getting up to speed.

It's been sitting for while now as I've had other things to attend to, so I haven't even been able to pull the plugs and re-inspect. As of right now it is definitely my weekend 'thing to do'.

[skyzend]

I've read all the posts dating back to the engine replacement.
I am just going through the same steps myself with a new used engine going in as I speak m.... main bearing problems from a rear intake coolant leak ... or so I'm told.

I have had the problem similar to what you describe. Small jerking like a miss or partial miss at cruising speed. I say partial miss since I never had the rough accelleration, but at cruising speed I got these subtle bumps from the engine that seemed like a misfire.

My fuel pump is getting long in the tooth "a little noisy but still appears to work fine. I would direct my attention to the fuel filter. Restricted flow could lead to "engine side" partial decreases in preasure at cruising speed and the odd injector missfire. Just a thought. Also could be a marginal partially fouled injector. Not bad enough to cause 100% failure but bad enogh to cause the odd bump hear and there.

[JoshBarber]

I have the same symptoms plus HORRIBLE gas mileage. Like half a tank in a day of normal driving. Do you have horrible gas mileage? Whats your fuel pressure?