Simple Question: MAF or MAP?

[Hokiefyd]

Not looking into debating which is a better fuel injection system, but does your car use a MAF sensor or MAP sensor (speed density) for its fuel injection system? Please post your vehicles and the system used. Also feel free to post former cars you've owned.

2011 Toyota Camry: MAF
2007 Toyota Corolla: MAF
2007 Chrysler T&C: MAP
2005 Acura MDX: MAP
2003 Dodge Grand Caravan: MAP
2001 Cadillac STS: MAF
1997 Cadillac SLS: MAF
1995 Nissan Truck: MAP

 

[eljefino]

Saturns s series 95-00 MAP
92 Cutlass ciera 3300 MAF
97 silhouette 3400 MAF
00 Century MAF
91 Dakota MAP
94 Spirit MAP
97 Contour MAF (ran/idled great without it or any intake)
99 Intrigue MAF
94 Mazda B4000 MAF (and twin heated o2 sensors!)
83 Mercedes 240d neither

82 Cadillac cimarron MAP/ carb
85 Cimarron 2.8 MAF (parents' and never recalled/replaced with MAP!)
87 B2000 MAP/ carb
96 Taurus MAF

 

[Win]

My 1994 Jaguar Xj12 uses a MAP system. Its engine management systems see the V12 engine as two inline sixes joined at a common crankshaft, so it would require two MAF's to manage if they had gone that way.

All my other cars use MAF's. I think the Xj12 is the only MAP car I've owned.

 

[Johnny248]

All three of my MAF cars also have a MAP =)

06 Eclispe MAF
08 Spectra MAF
96 Camry MAP
95 Ram MAP
95 Four Winns MAP

 

[QuadDriver]

I have had both, but if you modify a vehicle, you need a MAF system unless you like dreaming up fuel tables for ECMs.

the MAP must be part of what I call the 'trinity' to work: tach, TPS and MAP. And general knowledge of the true adibiatic efficiency of the motor at all RPMs.

MAF will always be more accurate, just easier to break down, knock out the MAF and the ECM limp home mode will be a poor guess.

On the other hand, MAP systems are so simple you can retrofit them to your lawn tractor....for example - GMs TBI system is a far better answer than a 2 or 4bbl carb on a 70's/80's GM v8 or 6. even without a fuel curve remap.

 

[exranger06]

2006 Ford Ranger- MAF
1994 Ford Explorer- MAF
1992 Honda Accord- MAP

 

[mechtech2]

Originally Posted By: Win
My 1994 Jaguar Xj12 uses a MAP system. Its engine management systems see the V12 engine as two inline sixes joined at a common crankshaft, so it would require two MAF's to manage if they had gone that way.

All my other cars use MAF's. I think the Xj12 is the only MAP car I've owned.


Unless the two 'sides' are using different camshafts, etc., you could easily use a MAF on only one side to get air flow meaurements.



MAF in the ZX2 and the Hyundai Sonata.

 

[strfx1]

2002 Saturn SC1 - MAP
2000 Isuzu Rodeo - MAP
2003 Mitsubishi Lancer Evolution VIII GSR - MAF

 

[Hokiefyd]

Interesting poll, and thank you for the replies so far. Interesting to see how the distribution is all over the place, even among one automaker (like GM).

 

[Vikas]

2000 Maxima MAF
1999 Toyota Camry 4-cyl MAP
1999 Honda Odyssey MAP

I know that both Honda and Toyota did move to MAP on their later models.

 

[brianl703]

Ford had pretty much switched completely over to MAF in the early 90s.

My Saab 93 has both a MAP and MAF sensor. My 88 Mustang left the factory with a MAP sensor but it has a MAF sensor now. My 97 Crown Vic has a MAF sensor.

 

[SteveSRT8]

It is a mistake to automatically assume a MAP system is inherently superior to a MAP setup.

As in many things there are many levels of complexity to both systems. I've got several trucks, all MAF. My car is MAP.

For a truly hi performance machine with serious HP the MAP systems work very well.

 

[mechanicx]

Most GM vehicles that have a MAF also have a MAP so it's not either or with them. After about '93 most of their engines had both. I think havin g both is best.

 

[Hokiefyd]

Yes, I didn't literally mean MAF or MAP as in anything with a MAF didn't have a MAP sensor (as most still do). I was mainly asking to poll which cars are using a MAF sensor and which ones are using a speed density system. I was interchanging "MAP" with "speed density" and I perhaps shouldn't have.

 

[mechanicx]

OK makes sense. I think GM mostly only used MAP on 4cyl and economy models after about '93. We should get more specific and list what kind of MAF. I think a lot of imports used to use an airdoor MAF, while most domestics use a hotwire. I don't see how an airdoor MAF is much different from a MAP, probably somewhere in between in precision.

 

[Vikas]

Stupid me, I meant both Honda and Toyota moved to MAF (I said MAP). MAF measures mass whereas MAP infers mass based on pressure but has more inherent errors.

 

[Hokiefyd]

Has Honda moved to MAF? I thought most Hondas still did not use MAF sensors.

 

[brianl703]

Originally Posted By: mechanicx
I think a lot of imports used to use an airdoor MAF, while most domestics use a hotwire.


The European imports mainly use a hotwire MAF, from what I've seen. Probably made by Bosch.

 

[CBR.worm]

Every fuel injected car/truck I have had has been MAF(dual MAF in a couple cases). Older ones used the spring loaded vane, newer ones hot-wire.

My bike is MAP

 

[Scott_Tucker]

Originally Posted By: QuadDriver

the MAP must be part of what I call the 'trinity' to work: tach, TPS and MAP. And general knowledge of the true adibiatic efficiency of the motor at all RPMs.


Can you please explain this?