Stock MAF problems still with s/c...

[1 BAD BURB]

well, as u remember i changed the maf back to stock from the Granatelli. the GMS was settin off codes all the time. after i did this the truck surged badly when i give it gas. after about 30 sec its gone and it runs fine. even after i re-set the ECU, it stil does this. There is no SES light also.
so now whats goin on? it still surges initially when i put it in drive. seems like not enough fuel is gettin into the engine...

any ideas?
Aj

[Physh1]

Does the stock maf still have the screen in it? Al;so, is the maf located near a sharp bend? If so, the sensor could be experiencing unequal flow across the sensor.

Cameron

[tobyhd1]

Physh, speaking of the screen,would there any benefit to remve it from the system.Obviously the filter will stop anything before it gets to that point.What`s the scoop on the screen???toby

[Physh1]

The screen is there to evenly distribute air flow over the sensor itself for accurate air numbers. A lot of people remove it but it's not worth a dime in HP numbers in my book.

Cameron

[BigBlue'00]

I just went form stock to Granatelli. Did you unhooked the battery leads during the swap?

[airdeano]

access a data scanner.
check the CKP retard and long term fuel trims.
airdeano

[1 BAD BURB]

sorry it took me soo long to respond, been workin a lot!!!

to answer a few questions...
1. yes, the maf is right after a bend in piping.
2. i did unhook the battery when changing maf's. and reset ECU.
3. stock maf still has screen in it.
4. i don't have acess to datascanner but it will be dyno tuned very shortly with a wideband o2 sensor.

thanks for the help!

[defiant]

Just out of curiosity....where would I find a 'wind band' O2 sensor if I wanted to pick one up?
Thanks

[1 BAD BURB]

i couldn't tell u...im not actualy buying one, its a buddy of mine who works on f-bodies...so he's gunna buy one... but i'll let u know as soon as i find out.
Aj

[vortec stroker]

Your truck needs to get tuned by Ed Wright at Fastchip! Who is it tuned by right now? If its not tuned professionally on a dyno, it'll run bad and probably self destruct in short order.