Mafs

[bubba]

Here's the thing, I changed my maf back to the stock 55mm, and the car ran like ****, so I changed it back to the t-bird maf... Car is back to running great. I'm stumped aobut this. Is it possible that the car likes to run a little bit rich, I'm not sure how long it's run rich, but it seems to like it?

Or is the 55mm maf bad that I put on? After the maf change, I unplugged it and the thing just stumbled 4k on, the thing couldn't a wouldn't get out of it's own way!

 

[theman88b]

Does the 55mm have a different sensor? Or are you using the same sensor just different size MAF's? You also have to let you car relearn after a change like that. Try resetting the ecu after you change it.

 

[yamahaSHO]

Are you clearing the PCM? What is the curve for each MAF and is it accounted for with some sort of tuning?

 

[bubba]

Yeah I've cleared for both, sensor is the 55mm and whatever came with the 70mm. Here's the thing, 55mm, the thing is good in the first 2 gears, it pulls good, then I shift into 3rd grear and it feels like I hit a wall. I put the pedal all the way thru the floor, and the rpms don't come up at all, very fast or even somewhat fast.

 

[yamahaSHO]

Sounds like you have a malfunction. Have you logged with a WBO2 or any data logging?

 

[bubba]

I don't have anything to data log with as of right now

Sounds like you have a malfunction. Have you logged with a WBO2 or any data logging?

 

[vortex2450]

I have a similar issue as my car came with a 93' cobra MAF and untuned ECU. I changed out for a stock MAF and the car stumbled and ran like crap even after a reset, so I reinstalled the Cobra MAF and it's was fine.. maybe these cars have amind of their own after all.

 

[yamahaSHO]

Since the cars came with these MAF's... Have you both verified that you don't have a chip in the ECU?

 

[bubba]

I had Boat look in there, and said the sticker was still there, I'll take a look for myself tomarrow

Since the cars came with these MAF's... Have you both verified that you don't have a chip in the ECU?

 

[jimtash]

Put the 55 back on and do a KOER test. Then tell us the results. More than likely the sensor is calibrated wrong and your 02's are cutting back on the mixture at WOT.