I just changed my mass air flow sensor on my 2000 SS and i feel like the car shifts totally different, am i crazy?

 

Yes it can. The PCM uses MAF readings to calculate engine torque which is used to determine shift pressure.

If the sensor is under reporting shifts can be soggy and even slip. With the MAF unplugged I believe the PCM is supposed to increase line pressure as a fail safe.

 

changed it and mild shifting was better on my way to work.

my old one had two dark and discolored "diodes" if you will

 

What kind of maf did you get did you get a new stock one. And is the shifting bad or is it good with your new maf ?

 

it is a stock one in good shape off my parts car. and the shifting seemed noticeably good when changed!

 

I have seen them get into trouble when used with air cleaners that use oil. This can cause transmission problems.

 

This is correct.

 

Yes! My 04 rcsb Silverado had a bad MAF and it honestly felt like the Trans was gone it would slip like crazy and not hold a gear. changed the maf and it worked like a brand new one

 

Mine is having a similar issue. The trans feels likes its slipping and won't want to go into 2nd gear. It eventually does, but sputters a bit. I'll take a closer look today and swap out the MAF.

 

I found you couldnt scan it cig lighter had a dime melted in it fixed it scan truck found #1 knock sencer bad comp was kicking trans out when you hit gas more then 2300 ish and when it shifted it was like the hardest shift kit money could buy felt and sounded like it was going to break the windshield out 33s chirping going into overdrive lol fixed knocks works great but kind of miss the chirp now but love having some timing lol. Now trucks up to par i can get back to the 98 lq4 is in cam is in and springs and Christmas bonus should cover my turbo kit and my synchro for t56 if i dont just drive over to monster and pick up. 80 and be done with it

 

Wow......yeah.

 

update us!

i changed mine 2 times, eventually tossed the KN in the storage room and put a paper air filter in,

my car has never shifted better

 

I recently bought a 2002 b4c. Car was in garage conditon.
But I hadn't be driven in a couple years. The power steering pulley bearing wore
down and I didn't know until it failed and threw the belt,
by this time the oully had been riding crooked on the shaft
and wore a hole in the reservoir. Which forced me to buy a new set up
and alternator cause the other one got soaked with fluid and failed.
Now since I took the intake off to replace all this I've been getting
a maf code and intake temp code after cleaning both and
having the code cleared 3 times. I can unplug the maf and notice
zero change in the way the car runs. When I'm sitting parked
the car has a wobble feeling, and when I put it in drive with my foot
on the brake it get a little worse. When I let off the brake it gets a little better
but still noticble. It didn't do any of this before it started throwing
codes. Can anyone help me with this?

 

Hijack #2!!!!!

 

Since you said you used one off your parts car, it may have had residue on it. Make sure you clean your MAF with MAF cleaner and let it dry before installing it.

If you use an oiled air filter, make sure you clean your MAF periodically to prevent this condition from returning. I'm finally gonna switch to an oiled filter soon, so I will make sure I have a can of MAF cleaner handy.

 

What exactly was wrong with the tranny not shifting? The day mine stopped shifting okay gave 1 heck of an kick that sent me frwrds and bk agnst the seat. It shifted hard that 1st time. Got going rev out whined out at 3 n 4 rpms. Couldnt shift 2nd time into 3rd gear . All at once happened was shifting fine prior to losing ability to shift while in drive. A few times the rpm hand had glitched to go from 1.5rpms to 3 or 4 rpms no interference with shifting thought it was an glitch. 1 time only it interfered with shifting wen hand went up like that to 3 rpms bk to normal I stopped SUV started shifting again from stop and shifted all fine. So them probs is what I did have before the tranny all at once stopped shifting. My heat blower would mess up b4 tranny shifting mesed up. Idk if anything do with each other. A guy came read with scanner while 0 chk engine light on and read camshaft sensor malfunction and throttle body sensor malfunction both codes were in yellow not red. He said an throttle body sensor cld mean not throttle body its self but cld meant mass air flow sensor. So bc did not say MAF sensor I refused send tons of money on it so I had him spray it with MAF spray cleaner he did plug it in without letting it dry first. I was mad. Okay he chngd camshaft sensor and that now after I put new battery in my SUV brought on chk engine light it says a code and says camshaft sensor malfunction circuit. So now guy says o parts store sold me bad sensor had 0 due with how he touched it. So now chk engine light is on reading about camshaft sensor malfunction came frm dffrnt scanner but now he chngd it says malfunction in the circuit. Okay it had been parked 1.5 months ppl said needed new tranny altho it shifts on shifter perfectly no sounds while shifting into R N P D. 1 2 3 . Except seems like it wants to shift in drive but just cant do so. Once I got told not tranny bc supposedly wld leak fluid or heard a bang or this n that ppl try saying 2 sensors change . Okay obd reader isn't saying now throttle body sensor since guy sprayed the MAF sensor its not reading on obd reader idk about if reads on scanner tool or not that guy used. So what was wrong with urs I need mine fixed asap pls help me also found afta SUV wasnt being started bc of drained battery an 7 foot thing looked like an wig dangling out of my tailpipe first told was catalytic converter mesh then told was mufflers silencer . SUV is not loud so had be sum1 shoved it up in there since seems 0 will come out of tailpipe if is part of an part unless happens while auto is running. Since suv wasnt running I doubt with 0 pressure that wig thing could of pushed its self out onto the ground still also shoved pretty far up into tailpipe. Okay so pls msg me bk asap. I have an 2003 Chevrolet trailblazer LTZ 4.2L 6 cylinder 4wd. Thanks. Knock sensor did it make in motor sound like it was slapping idk if I would call it chirping but sounds like tapping no knock but like sumthin tapping or brushing against something? You say knock sensor I assume in the motor okay am I right? Also you say comp do u mean in the computer of the auto?

 

if you want help with your issue do the following:
-start a new thread
-start the thread with the year/make/model of vehicle
-list any history/backstory in a well broken down, easy to read format...not 619 words of run on
-note any diagnostic you have done/tried. Codes, line pressures, etc

bringing up a 5 year old thread isn't the best way to get the best help for your particular situation