Problems with the PMAS slot style sensor!

[99cobra09]

Im having problems with my slot style sensor. Ever since my car had the supercharger the slot style has pegged at around 4800 rpm. I already had my cold side pipe remade to 3.5" tube which can handle lots of HP and it still pegs it, BUT the car has a really nice air fuel ratio curve when i got it tuned.

So me and my tuner came to conclusion that my sensor was bad because it pegs it at the same rpm since the begging. So i got a brand new sensor and i put it in and now the car barely runs, idles very rough. I tought that by putting the new sensor everything should be the same as with the previous sensor but its not. I tried reloading my tune and nothing. Could it be that the DAMN brand new sensor is bad once again or it just need a whole new tune for this new sensor??? :nonono: What are you guys thoughts?

 

[01yellercobra]

Does the car idle well enough to get some datalogs?

 

[99cobra09]

yea, it idles okay for some datalogging.

 

[01yellercobra]

I'd check the STFT's. If there was something wrong with the old sensor it's possible that the MAF transfer was adjusted around that problem. And when you put the new sensor in the transfer function is way off.

Are you sure you don't need a MAFia? I pegged my 2400 at 4500 or 4800 rpm and had to run the MAFia.

 

[99cobra09]

I'd check the STFT's. If there was something wrong with the old sensor it's possible that the MAF transfer was adjusted around that problem. And when you put the new sensor in the transfer function is way off.

Are you sure you don't need a MAFia? I pegged my 2400 at 4500 or 4800 rpm and had to run the MAFia.

What are STFT's?

There's no way i can peg a PMAS slot style sensor.

 

[encasedmetal]

short term fuel trims- there's a bank 1 and a bank 2 that you can select to datalog when using livelink. datalog those and post the results- try it at idle and then rev to 2000 and hold for a couple seconds as well.

 

[encasedmetal]

sorry your still having problems with this- been what 2 months of ****ing with this problem?

 

[01bluesnake]

If you installed a new sensor with a possible bad previous one, the
MAF Transfer curve will be off as said above, it wont run right.

 

[99cobra09]

If you installed a new sensor with a possible bad previous one, the
MAF Transfer curve will be off as said above, it wont run right.

thanks for the response, im going to get the tune fixed for the new sensor.

 

[01yellercobra]

Side note..are you going to make it to the Queen Mary show?

 

[99cobra09]

Side note..are you going to make it to the Queen Mary show?

My car wont make it but i will probably go check it out for a bit. I dont want to be stuck there the whole day with the dude talking all day! Not happening! LOL

 

[01yellercobra]

I think I have the wife convinced to cruise up. I'm definitly not showing this year.

 

[99cobra09]

Cool, we can meet up and have chat about our cars