Lack of Power??

[mprus]

Hey guys, Im kinda stuck, I have a 2005 Mazda 3 2.3L.

Ive noticed that today, in the cold, when I stop at a red light and then press down as much as i can the accelration, the car jerks/hesitates to go, stops at 2,000 rpm and then delays couple seconds and then goes for the launch. It should launch right away, but its not. I did put wd-40 on my belt beside the engine , but this problem was on my car before, but not sure what to call it.

I did a recent oil change and filter.Also air filter.

Any ideas??

Mike

[mprus]

if i drive like "normal people" then its fine, but if i wanna be racer, then theres a problem as mentioned on top.

[CanSpeed 3]

Auto or 5 speed?

[Zoom Zoom Boy]

Auto or 5 speed?

I had the same question. I assume auto from his description.

OP, did you ever have the ECU reflash TSB performed on your car?

[wikdslo]

Just a guess but it *could* be a frayed wire connection to the MAF. These cars are known for having short harness wires that tend to cause problems.

I had a similar issue (2.3 Manual) where if I gradually took the car up to speed it was fine, but if I hammered on the gas it would buck and jerk and then stumble it's way up.

The issue I had was the ground wire that goes to the MAF sensor was frayed and almost completely severed inside the wiring harness shielding, so the MAF was getting too high an output due to no path to ground.

This messes with the computer big time when you give it a lot of gas, and the car should richen up because of the air getting through, but can't becuase it's getting bad readings from the MAF so it has no idea how much air is passing into the motor.

One thing you can try is let the car idle, open up your hood, and just move the harness around where it connects to the MAF.

If you notice ANY change in the car's idle, I'd say you should start there.

You can search for my post on the issue.
I posted a link to the wiring diagrams, just trace the wires to the ECU harness and test them for continuity.

That being said, it could be a ton of other things too!