OK this is what's been happening:

I blew a MAF a month ago, replaced it with the newest part. My car is a 2002, which had the 02 MAF previously, now its got what I'm assuming is equivilent to the 03 MAF. When I first installed it, the car threw a code that was along the lines of "high temperature output" originating from the temp sensor in the new MAF. This code as since gone away. Currently, I have code 0447, EVAP canister control circuit open, but that has been on for a year now (never bothered to fix...)

The problem I'm running into is when the car gets fully warmed up, say after 10-15 minutes of driving, I experience a huge lack of power in lower RPM's. For instance, if I'm at a stop and floor it, the car bogs down horribly until it gets up past 3500 RPM or so, where it seems to accelerate more normally. Also worthy of noting is when this lack of power is not present, engine sounds are normal, however when the lack of power is going on and I lay into the gas, the engine is signficantly louder... No idea how this increased noise is related to lack of power, but there is most certainly a relationship.

Also, when the power loss is occurring and say I'm going ~50, give the car more gas, it experiences a minor "bucking." This goes away when it downshifts, or at least it is not noticable.

My guesses are:
-ECU needs to be reflashed due to the new MAF outputting different signals that may be confusing the ECU (air/fuel mixture may be off?) as engine temperature increases.

I'm pretty sure its not the MAF going bad again, because this problem started the day I installed the new MAF. Also, no MAF codes have been thrown...

Any advice would be greatly appreciated, I prefer not to go to a dealer for them to charge big $$ for what is probably a minor problem.

Thanks

 

anyone?? ..

 

I could be wrong, but wouldn't an ECU reset help here? I would also make sure all your connections are correct, tight, and not leaking. Specifically, you don't want any unmetered air getting around the MAF into the engine. It would lean the motor out and could be a source of trouble for you.

 

MAF may be bad again. Could be fuel (lower octane) related??

 

i just put on my cai and it feels slower? does the ecu have to learn the new amount of air or what, also how do i get the ses light to go off?

 

Did you disconnect your battery during install? Are you Autotradgic? If you r are autmatic you need to reset the ECU has it picks up driving habits for your shifting somehow (read on here and it worked on mine) Mind you I lost low end regardless.

 

so just drive it awhile untill it resets or do i have to do it somehow? yes i am automatic

 

This is what I figured. I am Automagic as well. I'll try the ECU reset and see if I feel it on the butt dyno in a few days.

Only thing I've really noticed is the car will not kick down into first gear unless I'm at 30mph or slower. It used to kick into first at around 40mph with the stock air box and filter.

 

Mine has always done this.. Even with the stock airbox.... On the positive side... it's good for dynoing..

bigdo26... Check PM... and the IAT sensor.