Engine Adjustable MAF ????

[Mr.Kelley]

So I'm researching trying to tune my Fox MAF running the 2000ish Explorer induction and fuel system, and I found this http://mass-air.com/Products.htm


Any thoughts from the experts and peanut gallery.

 

[7991LXnSHO]

The peanut gallery has spoken.

 

[Mustang5L5]

I don’t believe that part was very popular. You’d need a wide band to “tune” it and it would be a steep learning curve.

what issues are you having? I ran an SN95 70mm MAF with 19s and cobra intake (similar to explorer) and it ran beautifully without any tune

 

[Mr.Kelley]

I'm running the stock 2000ish explorer intake, TB, orange injectors, returnless fuel rail, and fuel pump. no EGR or air pump. Stock Foxbody MAF. Iron Exh Manifolds into singled 2" exhaust. Runs rich, how rich I don't know but it's stinky. Idles ok but if I get in heavy stop and go traffic it loads up. Accelerates and cruises good but I think it should do better than 17mpg pushing a 2200# car down the freeway. I don't think I can run an explorer MAF on the Fox ECU. Would the SN95 MAF get me closer.

 

[Mustang5L5]

No, you cannot use the explorer MAF. What are you using now for a maf?

you can use. 94-95 SN95 MAF with an A9L. Is this the ECU you are using?

 

[Mr.Kelley]

The MAF and ECU I got along with the Painless harness. The MAF is an 87-90 Fox. The ECU is an 8LD which is a CA Emissions A9L. If I use the SN95 are they all the same, or do I have to find a Cobra one.

 

[General karthief]

What's your fuel pressure?

 

[Mustang5L5]

Your setup should run fine as it is. Something else is amiss. Have you dumped codes?

 

[HemiRick]

orange injectors are 22 lb. stock MAF is set for 19 lb. thats why you're rich.

 

[Mr.Kelley]

HemiRick everything I can find says orange is 19# I am running the explorer skinny injectors but I do have a set of the fat orange Mustang injectors. Do you think switching to those would help me out. I am going to check codes a little later today. I'll get back if there are any.

 

[Mustang5L5]

The orange explorer injectors are also 19# with a better spray pattern. They should work fine

 

[Mr.Kelley]

I pulled codes and got a 33 - EGR open not detected. With no EGR this is expected. I do need to go for a short drive and get it up to temp and repull.

 

[Mr.Kelley]

OK so I don't have any codes pointing to a problem that would cause a rich situation. I have a slightly larger throttle body and a better flowing intake with 19# injectors. If I get the SN95 MAF do you guys think it would match better than the earlier one I'm running now. I can get a reman one from the parts store with a lifetime warranty for $70.

 

[Mustang5L5]

Foxbody MAF vs the 94-95 MAF should not make any noticeable difference . One is 55mm the other is 70mm. The transfer curves are close enough that the car should run exactly the same. I don’t think it will solve your issue

 

[Mr.Kelley]

I found my runs rich issue. As stated earlier I'm running stock 2000ish Explorer intake and fuel system. A quick google search says 2000 Explorer fuel pressure is 60 psi an actual working gauge says 62psi. 88 Mustang fuel pressure is 40psi. The Explorer fuel pump has an inline regulator right above the pump in the tank it dumps the excess before leaving the tank. Does anybody make a 40psi inline regulator for a returnless system.