Granatelli Maf worth getting??
You would be better off pissing into the wind.
12-24-2004, 02:19 AM
#6
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Try This Instead!
Originally Posted by 4.8redchev
If you want to do a MAF sensor upgrade, try this instead. I have done this mode to my truck, and I am totally impressed, and it works great!!!
Purchase an OEM GM Mass Air sensor, but buy the one made for the 2001 -2004 2500HD with the 8.1Vortec Big Block. The unit flows more cfm, and it plugs in the connector exactly the same and it fits the same as your 4.8 does, because the size of the housing ends are the same. The beauty of it is, that it's an OEM design, and when installed correctly your trucks stock ECM with mate with the new airflow cfm values produced by the 8.1's MAF.
When you install the sensor, make sure you dissconnect both bat. terminals first. Install the sensor. Then discharge the electrical system by touching the un-hooked battery terminals together. Then hook the battery back up, correctly. Start the truck and let it idle for 3 minutes. Turn off the truck for 1 minute. Start again, and drive at regular speeds untill 60mph, at that time go to WOT and hold untill 75mph. This is a manual "re-learn" process for the ECM. The truck will continue to change the way it runs, each time you start and drive, because the ECM monitors all functions and always tries to learn your driving style.
I work at a GM Dealership, so I just used the GM Tech 2 OBDII Scan Tool to re-calibrate my ECM and set to re-learn process. It's just alot eaisier, and quicker without have to do all the driving. So if you have a buddy that works at a GM Dealer, or has access to a Tech 2 ScanTool, then ask them for a favor.
If you'd like, email me and I'll get you the GM part number for the MAF Sensor.
Later.
12-24-2004, 04:47 AM
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i like GM partsguys idea i just descreenec my MAF and it works fine for me my bro works for gm and could get a deal on the one partsguy was talking about i might try that though thanks gmpartsguy 
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12-24-2004, 06:51 AM
#8
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Originally Posted by GMPartsGuy
These guys are right, don't waste your money...please!!! Granatelli MAF sensor is a joke.
Purchase an OEM GM Mass Air sensor, but buy the one made for the 2001 -2004 2500HD with the 8.1Vortec Big Block.
If you'd like, email me and I'll get you the GM part number for the MAF Sensor.
Later.
Purchase an OEM GM Mass Air sensor, but buy the one made for the 2001 -2004 2500HD with the 8.1Vortec Big Block.
If you'd like, email me and I'll get you the GM part number for the MAF Sensor.
Later.
Post a part number please.
Thanks for the info.
=Dave
12-24-2004, 11:43 AM
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Originally Posted by sfj
i like GM partsguys idea i just descreenec my MAF and it works fine for me my bro works for gm and could get a deal on the one partsguy was talking about i might try that though thanks gmpartsguy
12-25-2004, 01:22 AM
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What is the benefit of the 8.1 maf? I realize it flows more cfm, but Is it "worth it"? Would I benefit from it over stock on(in) a ps1c(9lbs)4.8 m5? I'm trying to tune(learn to tune) with hp tuners 1.5 and I wonder if the 8.1 maf would help or hurt things. The truck is a 99; is the 2001-04 8.1 maf going to be a "plug and play" if you think it would be of benefit to me? Thanks in advance for any info. 