I have the typical problem many have had: poor acceleration, hesitation, etc, but about 75% of the time...the other 25% it runs slick...quick off the line, nice smooth shifts. I've replaced the throttle position sensor (the one next to the firewall) and the heat sensor. What really gets under my skin is it running lousy have the time, and really good half the time, all with no codes. I think it's probably a bad sensor, but what sensor fails half the time? Don't they usually work or don't work? One or the other, not both! I don't want to keep replacing things one by one until I find the culprit...

 

How many miles?

 

155,000

 

perhaps you need a valve adjustment? not sure on this one, sorry

 

sounds like carbon build up in TB EGR IM and other places.. stop replacing, start maintaining

 

Replace what next? I'd suggest the entire car

 

Thoiboi, I don't think your explanation explains how the car currently fluctuates between running excellent and then in the same day the car hesitating and running sluggish, does it? If the car has bad enough carbon build up to make it run poorly, I don't think it would also run excellent. I can see how a bad sensor would make that happen. TacoBello, yes, I'm looking to fix and sell. Or just sell.

 

Nowhere in your OP did you mention anything about it happening in the same day.


You're the one coming in here for advice. You, thus have full responsibility on giving us all the pertinent information for us to help you...



Just sell it.

 

Would every other day be acceptable? doh.