Car missing at half throttle

[stangracr67]

Alright I'm still trying to get rid of this half throttle stutter/miss. The check engine light does not come on. I have recently changed plugs/wire (wells look good), O2 sensors, TPS, and cleaned every nook and cranny of the intake and mass air. Ran the codes and all i get is 111, 528, and 538. The car idles great doen't stall at all seems to start fine. When you put it to the floor the car seems to run great at high rpms but easing through the gears it feels like the car misses and stutters. As far as i can figure it has to be in the ignition. washed the car and engine comp today and the car ran like crap for about 10 mins popping at idle and missing really bad. Could it be the coil????

 

[Ishodu]

I would check the plug wells for water if you washed in there with water. Yes even the back ones.

 

[stangracr67]

good call. ol #3 was filled with water. thank god for shop vacs! thanks!!

 

[sdpatt]

For the record, a misfire without a CHECK ENGINE light is either spark plugs or plug wires.

 

[stangracr67]

thanks sdpatt. You know how if you have an engine that has a distributor and the timing is off when you try to start it, it turns over a few times and then pauses over and over without starting. My car has done that a couple times in the past few months then i turn the key off and try it again and its fine. has anybody had this happen to them??

 

[Redline]

Yes, I have had something similar to this happen to me. It was when my CID started to die, and usually happened when the engine was warm.