I upgraded to a JET performance MAF sensor. However, I also upgraded to the JET throttle body as well and have the engine tuned with a Diablo sport tuner in addition to a MIT intake with a AFE dry performance filter.

The performance MAF sensor is suppose to read higher than the stock MAF airflow limit to account for higher flowing air intakes that create more CFM than the stock MAF can read from my understanding.

My Caddy can do 0-60mph in 6.5 seconds with heavy 22in wheels per the Torque Pro GPS acceleration app I use to test my cars performance; which is great since the 2002-2006 Escalades are rated to do 0-60mph in about 7.8-8.6 seconds(varies by models) per auto magazines in stock form. So the engine mods work to increase performance including the performance MAF sensor.

GM really de-tuned these engines(LQ9) from the factory, however companies like JET and Diablo Sport have made products to overcome most of the bottlenecks to really wake up this engine.

 

hey bud I have a similar setup as u on my 07 Escalade, jet maf, jet TB, k&n cai, next I gotta get a Diablo, but my issue is the maf, it causes all kinds of stabilitrak, lean, codes when I install it. I however noticed definite gains from it and a tiny loss without it. But is there a way to programm it to work without all of the Check engine lights etc???? Once I remove it, the throttle body and cai work perfect. What do I have to do with the jet maf????

 

Thank you for the info. Too bad jet doesn't make a throttle body for my year,I guess fairly soon.

 

What year Escalade so you have?

 

For the flip side, a JET "performance" MAF (physically modified only) screwed up my fuel mileage and set all sorts of lean mixture codes on a 2002 Northstar V8. Off-idle bog and poor driveability.

No, that honeycomb flow straightener offers no flow restriction - the MAF bore is far bigger than the engine needs for air flow at wide open throttle redline shift points. No, the 2000 - 2005 Northstar PCM cannot be tuned - no one has hacked it yet.

Big ripoff - it's still on the shop shelf if anyone wants it.

 

For the flip side, a JET "performance" MAF (physically modified only) screwed up my fuel mileage and set all sorts of lean mixture codes on a 2002 Northstar V8. Off-idle bog and poor driveability.

No, that honeycomb flow straightener offers no flow restriction - the MAF bore is far bigger than the engine needs for air flow at wide open throttle redline shift points. No, the 2000 - 2005 PCM cannot be tuned - no one has hacked it yet.

Big ripoff - it's still on the shop shelf if anyone wants it.

View attachment 583780

I am not sure about 2002-2004 ECU/PCM tuning, however the 2005 and 2006 ECU/PCM are the same to my knowledge in our trucks. The 2006 model ECU/TCM can be tuned by a number of aftermarket tuners including Diablo Sport in which I use. The JET MAF unit works perfectly in my 2006 Escalade. No idle issues or any other issues. Engine runs smooth.

I respect that you are trying add your experience with an aftermarket MAF, however the Northstar engine(crappiest engine design ever) and LS engine are not even close to being the same engine so it really does not reflect the OP question about the effects of a aftermarket MAF in his LS engine.

It is like I stated that a performance MAF sensor worked well for my old Buick V6 engine and then say it would work on the LQ9 V8 based on that fact. My statement would be full of conjecture that does not even apply to the proper engine in question based off experience from a totally different engine. Not a good point at all.

 

A 2003

 

Yes I know they make a MAF, they dont make a throttle body for that year yeti

 

Oops. My mistake, I was thinking about the main topic of this thread which was the MAF sensor. I am surprised that the 2003 throttle body is different than the 2006 throttle body.

 

JET does not "make" those MAFs - yours or mine. They take a stock DELPHI ("AC Delco") MAF and mechanically modify it then call it a "performance" MAF.

Nothing is done to either the heated resistors or to the IAT thermistor. See Post #4 and compare the two. If you do the swap, be alert for lean mixture codes.

Same P/N for a 324 cubic inch and for a 366 cubic inch engine???? Gee, one would think they required different air flow volumes at higher rpms ..........

Curiously, they list the SAME picture for my 2002 Northstar engine - a 279 C.I. engine. Anyone smell a rat ? ....... and if you compare the JET site picture with my workbench picture you'll see that they have further mechanically modified the MAF since I bought one in 2007 - and did a year's worth of test driving with it and the stock one. ............... the old before and after timeslips showed a .3 second LOSS in the 1/4. Maybe their website is out of date ?

(Nothing is wrong with the Northstar engine - properly maintained it's strong, quiet, reliable.)

 

I will not argue the how and what JET has done to stock MAF sensor to upgrade it, because I really do not know. It seems to work so that all that matters to me. I have no issue with it. Therefore, I will not speculate about how JET creates/modify it product. If it make you feel better, that have at it.

As for the Northstar engine. I recommend a person read this and then judge for yourself if the engine is really good choice to buy on the used market.

Cadillac Northstar Engine Problems

Built as an answer to Ford's 4.6-liter modular engine, introduced the same year and carrying the same displacement, the greatest of Caddy's little V-8s made history for two reasons. It was the first GM production V-8 built for overhead cams, and the last of the "non-corporate" V-8s the company...

itstillruns.com

 

Remember - before you do ANY "performance" modification do several runs at a Friday night Test & Tune, modify, then more runs - that way you have a baseline to see if you helped or hurt the performance. Butt dynos are no good. Ever.

 

Well,if my butt dyno is happy then that is all that matters to me. That means I am satisfied with the product. The opposite is also true, if my butt dyno does not trigger a positive reaction then it does not matter to me if a time slip says my engine is quicker. Happiness is mainly based on perception, not facts.

However, I do like to have facts to back up my butt dyno like how my truck runs a 6.5 second 0-60. It used to run a 7.0-7.2 second 0-60 before the MAF/throttle body change even with my tune. Therefore, I assume the stock versions of the two parts were my bottlenecks to my tune and performance air filter, I am a happy customer.

 

Different cars, different engines, BUT - years ago I threw away good money for a JET "performance" MAF which turned out to be nothing more than a stock DELPHI MAF mechanically altered to supposedly allow more air flow. It set lean codes, caused a significant off-idle and midrange acceleration stumble and cost about 2 mpg at cruise speeds. It's still on the shelf.

IF a specific PCM will alter fuel/air maps based on measured changes to the intake system then there may be some advantage to modifications. IF.

That honeycomb flow straightener ("screen") is there for good reason and is no restriction given the bore size, airflow needs, and engine size (cubic inches).

The tiny black bead at 1 o'clock is the IAT thermistor - Intake Air Temp.

 

Different cars, different engines, BUT - years ago I threw away good money for a JET "performance" MAF which turned out to be nothing more than a stock DELPHI MAF mechanically altered to supposedly allow more air flow. It set lean codes, caused a significant off-idle and midrange acceleration stumble and cost about 2 mpg at cruise speeds. It's still on the shelf.

IF a specific PCM will alter fuel/air maps based on measured changes to the intake system then there may be some advantage to modifications. IF.

That honeycomb flow straightener ("screen") is there for good reason and is no restriction given the bore size, airflow needs, and engine size (cubic inches).

The tiny black bead at 1 o'clock is the IAT thermistor - Intake Air Temp.

View attachment 600177

I will have to agree with you mostly. It seems like the Jet MAF sensor work well with a stock engine without modifications to the airbox and ecu.

The stock ECU can adjust a bit for extra airflow to a point with the 26lb injectors in our 6.0 engines so it can handle extra airflow proved by the JET MAF alone, but the 26lb injectors can not provide enough fuel to handle the extra airflow provided by high flowing air intakes and altered timing from out-of-box tuners; which are also based on the stock air-box and MAF sensors when the tune was created.

Therefore, it seems the JET MAF will work fine with our stock fuel injectors on a stock engine by providing a bit more airflow that the stock fuel injectors can handle. However, with additional airflow mods the fuel injectors will need to be upgraded or the engine will just run lean with the JET MAF sensor.

So the JET MAF is not a bad product; it is our weak 26lb fuel injectors which is the bottleneck when an aftermarket intake setup is used with it.