Jstyle

Has any one got a SES light from a Granatelli MAF. I know alot of people are gettin them with the SLP 85 MM but I havent heard alot about the Granatelli... Also where can I get a MAF-t thanx guys

Josh

Ragtop 99

iTrader: (7)

I haven't heard of issues with the GMAF. I had one, no problems.

If you want a used MAFT, I'll sell you mine for $125

pedaltothemetal

It's CARB approved so it's calibrated to run just like a stock one on our cars. So it will throw no codes.

Leo

BlakeSS

The SLP version is LS1 calibrated also.
To say neither will throw any codes is flat out false.

You're probably getting the same SES light that I did when I installed my 85mm maf.

MAF High Frequency.

Easiest thing to do is have the code deleted from the computer via reprogramming.
Solved my problem.

Blake

Blake

NX†C

with the granatelli i pulled a MAF high frequency code following by a clearing with ATAP.

Jstyle

Does any one know how I can clear it other than buying a Auto tap? I'm trying not to spend alot of money to make a part work...

Black LS1 T/A

Instructions on How to Reset the LS1 ECM
Submitted by: Scott Harroff

This is intended to reset that aggravating 'Service Engine Soon' light so many of us seem to see. The light is normally set due to a loose gas cap or a high frequency error on the mass air flow sensor in front of the intake manifold. If the light persists, you may want to have you car checked by a GM dealer. It may be a good idea to remove your K&N air filter, and replace it with the stock filter or equivalent before your visit to the dealer. Dealers, in the past, have been known to blame the MAS error on excessive oil in the K&N leaking onto the MAS. If the fuses aren't removed in this procedure, the codes will be stored in the ECM until the fuses are removed, or the dealer clears them with a scan tool. Rumors have it that stored codes retard timing and spark ignition which will hender the performance of you LS1.

1. Turn key on but don't start car.
2. Pull PCM BAT and PCM IGN fuses in engine compartment.
3. Wait a few minutes.
4. Turn ignition off.
5. Replace fuses.

It will take the car a while to relearn the fuel and timing curves so don't worry about a temporary performance loss.

mako22

iTrader: (2)

u guys sure that's what code you're throwing? I installed my GMAF and consistently threw 170,174 - running too lean! I have since sent it back to Granatelli and am awaiting a new unit. I have heard from a few others that they got the same situation with no resolution - will post my results with the new unit as soon as I get it.

slow

iTrader: (7)

aftermarket mafs trick the computer into seeing less air,

less air, makes the computer give less fuel, and more timing.

Any aftermarket maf (other tha the pro M univer) is a joke on these cars.

you might make a few hp with it, but it is just from timing, and fuel, not from the larger inlet opening.

I can go on for hours, with details is necessary, but that is the summary/bottom line.

Ryan,

Creed

You should definitely get the code diagnosed so you know for sure what it is! I started throwing a too lean code after my I got my headers (I also have a GMAF), but it's really just the combination of your other intake/exhaust mods that usually contribute to a lean/rich condition. Vacuum leaks can also contribute.

You may want to just go ahead and reset the code, but if it pops up again, get it scanned to find out what it is.