GM MAF Sensor

[Boosted98Clipse]

I apologize if I am being repetitive, but I can't really find a good answer as to why GM Maf Sensors are used on the GSXS. I have one in the garage, and am wondering if this will really be benifical to the car if I put it on. If anyone can offer me insight into the reasoning behind this I would appreciate it.

 

[bjmauck]

I would say you need a bigger pump and injectors. You have a 98 so you can flash the ecm. Search ceddy mod and read up on that. I have it and like it and its way cheaper then the dsmlink. I had a gm/maft and hated it cause of the change in tune if the temp or weather changes. The maft sets the baro and temp so any change is not compensated for. You could be fuel cutting because of a boost leak tho even if its making 8 lbs and holding cause the 20g can flow plenty of air. You need to boost leak test before wasting money on anything.

They're a lot of people running 20-25 psi on stock 2g maf. That's not gonna be your problem.

 

[laserspeeddemon]

I was reading this whole thread and was appauled at the misinformation on it, then steve came and saved the day.

To put it simple:
YOU HAVE A BOOST LEAK!

Oh and NEVER go back to that JK Tuning place. They are a joke (pun intended). How does a place tell you to reflash the ECU without either a) seeing the car or b) seeing the car, yet noticing a massive boost leak. They would have to ASSUME that the engine was in good working condition, which obviously it's not. Any place that calls themselves "TUNING" should not assume an engines condition, that kinda of work ethics leads to catastrophic engine failure.... shoot it lead to mine.

 

[Tiki2777]

Let's think this through to see if this sounds like a good idea.

In order to keep the ECU from triggering fuel cut the device has to lie to the ECU about how much air is entering the cylinders and never report more then some value X. (like Brian said, fuel cut has nothing to due with injector capacity or running out of fuel, it's a protection against the wastegate failing on a stock car and overboosting. The ECU has a limit of how much air should flow through the engine worst case and cuts off the fuel it it's exceeded)

The ECU in turn uses the amount of air measured to calculate the amount of fuel required to meet the target AFR for that much air.

If the Translator stops reporting the correct airflow at value X then the ECU won't add additional fuel are required for anything over X and the engine will get progressively leaner as the airflow increases.

That doesn't sound like a good idea to me.

With everything being stock, you have to be leaking air somewhere to cause the MAF to measure enough airflow to trigger fuel cut.

Damn, beat me too it.

GM MAF setup close to throttle body (obviously on IC piping) with translator
= VENTING TO ATMOSPHERE
If thats your thing, go for it, but make sure you get some fuel upgrades and tuning solution for that 20g

Since you have a 98 = go with ecuflash with ceddymods, much cheaper than dsmlink if you're on a budget.

 

[Boosted98Clipse]

Thanks for all the info. I will check into a boost leak. I never preformed a solid test on it to confirm or not, just saw the boost was at the same before and after the exhaust. I for whatever reason figured that would be too easy and started jumping into the more expensive fixes. I know at some point I am going to need a way to tune the car (which will most likely be reflashed) but that would be amazing if I am over complicating things.

 

[92AWDHX40]

the only reason i got the maft it was cheap.

 

[jcarmichael]

The boost leak theory is the greatest theory, without sounding like I am doubting it. on my car when I have a boost leak I usually get fuel cut and bogging way before 5k. also it verys on different terrains like going up a hill. however with the 20g it could be building slower and causing it to happen at higher rpms. also depending on the size of the leak as well.

 

[Boosted98Clipse]

Well I got it to move from 5k to 6kish. Went over all the copulers except one (didn't feel like taking the bumper off for that guy)and pulled the plugs and cleaned and regapped them. At least she's making some progress. I got 8.5mm plug wires on the way along with some 7 plugs instead of the 6s in it now. See if that helps with the top end at all. Definately will be pulling the bumper to tighten that last one too. Good day all in all.