Explorer swap sensor confusion!!

[charlien]

Broncobowsher..do you run the explorer engine, if so what MAF do you run...

Viper...are you willing to run the 94-95 70mm MAF on your vehicle. If so could you report back any significant changes? i.e. idle, surgine, mpg, etc. You can get them used on ebay for around $40 and probably dirt cheap at a p-a-p. I'll even chip in some money if you're willing to try..

Or is there anyone else willing to try? This would be without a tweecer please, just the A9* computer and 94-95 70mm MAF.

 

[Broncobowsher]

I did a 5.0 stroker in a Ranger a few years back. That is where I learned tons about this stuff.

It had an 80mm Lightening MAF, 24 Lb injectors on a U4P0 with a custom tune.
With a custom tune you can just about make anything work with anything.

 

[Pedestrian]

Need some clarification on this.
Is the calibration of the Explorer MAFs different depending on year/ injector size?
The 96-97 has #19 injectors the later years have #14.

 

[Pedestrian]

I guess the real question is, Has anyone used the larger MAFs and had it work?????

Depends on what you mean by "work"
I am currently running the Explorer MAF and have no idle issues.
I am running a 92 Tbird ECM though.

I do have a new 95 GT MAF I just haven't seen the need to use it yet

 

[Broncobowsher]

Need some clarification on this.
Is the calibration of the Explorer MAFs different depending on year/ injector size?
The 96-97 has #19 injectors the later years have #14.

Again, MAFs are not calibrated for the injector size. MAFs are calibrated for airflow and the computer has a matching calibration.

Also, later Explorers have 17# injectors, not 14s. The 14s were non-HO 5.0 crown vic/town car stuff.

'96 Explorer MAF A-1 #749549
'98 Explorer MAF A-1 #749549
'99 Explorer MAF A-1 #7450011
'01 Explorer MAF A-1 #7450011
Looks like they are different.

 

[rjrobin2002]

I will be a second test dummy and try my 97 Explorer MAF with my A9 computer when I install my EFI in the next few weeks. I have a 95 Mustang MAF also I will try. Just waiting for the RJM harness in the mail.

 

[charlien]

Thanks RJ....we'll all be waiting for your observations......

 

[Pedestrian]

Again, MAFs are not calibrated for the injector size. MAFs are calibrated for airflow and the computer has a matching calibration.

Also, later Explorers have 17# injectors, not 14s. The 14s were non-HO 5.0 crown vic/town car stuff.

'96 Explorer MAF A-1 #749549
'98 Explorer MAF A-1 #749549
'99 Explorer MAF A-1 #7450011
'01 Explorer MAF A-1 #7450011
Looks like they are different.

Thanks Broncobowsher, I'm still confused but trying to learn.
If there is a difference in calibration and I am trying to get a chip "tuned" how does the tuner know what the calibration of the MAF is?
Will a Tweecer or Quarterhorse read the calibration of the MAF?

 

[gunnibronco]

Bump!

I'm reading as fast as I can.

I'm going to a salvage yard this weekend. I'm pulling a 96 Explorer motor. I was told it was complete except for "the airbox". After multiple car-part.com searches, I think the MAF is missing, if their inventory is really complete.

There is also a 95 Mustang GT/not Cobra, w/airbox & MAF. Am I correct that this is the same exact airbox that the Explorer uses, and it can be installed under my unlifted Bronco hood? I've got a bubble & don't mind cutting metal.

I'll have access to multiple 55mm MAFs, and plan on getting one off a 92 5.0 Lincoln Mark VII, along with the distributor and computer (for a core exchange). car-part.com cross references these w/92 Mustang.

Although I see why the 70mm MAF is not necessary, I'd like to have one, if I ever go larger (stroke or 5.8L). So I'm going to buy both, the 95 Mustang GT 70mm MAF & air box assembly, and the Lincoln 55mm MAF-to be safe. Assuming both are available.

I'm new to EFI, but I work at a dealership and have access to tools/mechanics so maybe I can help measure the 95 MAF. I don't know what I'm doing, so I'll need some guidance. If there is something I don't have, Viperwolf1 is a few hours drive away & I could drop the MAF off my next trip to Denver.

My hijack:
Why is the A9L/A9P computer preferred? fordfuelinjection.com lists lots of other Mustang MAF computers. Is it the most aggressive tune?

Chad

 

[broncosbybart]

bumping this thread back up. has anyone tried the 70mm MAF from a 94-95 v6 mustang yet? i have a 70mm MAF that i will be trying on my 98 Explorer. the 70mm MAF was from a Crown Vic, IIRC. It has the part # that Viperwolf listed in a thread a while back (can't find that thread now). I don't have it running yet. Hopefully this week. I do have a 55mm stock mustang MAF, if need be. I'm gonna try the 70mm first. I don't have any diagnostic tools (other than manual KOEO and KOER tests), so hopefully it will run fine without much work- we will see... Just wanting to see if anyone else has some real world working setups.

 

[gunnibronco]

No luck here. Every 70mm MAF was gone at the yard I went to. Lots of 55mm.

Chad

 

[G's Baja Bronco]

going to look for a 88-93 stang MAF tomorrow, i will report if I find a 94-95 mustang MAF, I will get a V* mustang one, not V6, I already have the 96 explorer one and a 93 cougar 5.0l ho one. I probably will start the engine with the 88-93 MAf and then test the 94-95. They should cost about 30 dlls each ;D

I figure I try to thread new ground for the team

 

[Viperwolf1]

bumping this thread back up. has anyone tried the 70mm MAF from a 94-95 v6 mustang yet? i have a 70mm MAF that i will be trying on my 98 Explorer. the 70mm MAF was from a Crown Vic, IIRC. It has the part # that Viperwolf listed in a thread a while back (can't find that thread now). I don't have it running yet. Hopefully this week. I do have a 55mm stock mustang MAF, if need be. I'm gonna try the 70mm first. I don't have any diagnostic tools (other than manual KOEO and KOER tests), so hopefully it will run fine without much work- we will see... Just wanting to see if anyone else has some real world working setups.

I know a couple people running that F2VF MAF. Both are 351w and they seem to run well. I can never seem to find one at the yards. The '94-'95 MAF is the same for V8 and V6.

 

[broncosbybart]

As an update, the 70mm MAF has been working well for me. my idle is high- between 1200-1500 rpm, but it is a race rig and has no VSS and is running a c-4 auto trans, so i don't really care. all i care about is that it doesn't idle high enough to shift hard and that it doesn't stall when switching between forward/reverse gears in a race... otherwise, it is working like a dream (all 97 Explorer parts, except for a 90' Mustang MAF harness, distributor, A9 (L or P- can't recall which is for a manual trans), in line fuel pump, and oxygen sensors. I really like how it turned out.

 

[lonicus]

Since I finally have the EFI working, mostly, I will chime in.

I installed a 96 (Though I think the engine was a '97 model year, crossover point) Mountaineer into the Bronco.
Running a A9* CPU
Got a '94 Crown Vic 70mm MAF from the Junkyard. (This is off a 4.6 engine)

Works really well for the most part. I'm not very happy about the mileage. Still only getting 10MPG mixed highway and town.

Had a really weird experience in the hellhole most people call LA yesterday, where sitting is bumper to bumper traffic for 30 minuets (After driving from home for and hour an a half) the engine suddenly had a problem keeping idle, and wouldn't respond to the gas pedal. As quick as it happened it went away and no more issues.

I don't know if this is the "surge" people talk about or not. my idle normally sits dead at ~800 rpm.

I can only figure the problem comes from the stress of HEAVY traffic. (405 was a parking lot) IT has to be either fuel delivery - which I would expect to see at other than idle, or control system.

So is it the MAF? the computer trying new things? or something else, I don't know.

 

[Viperwolf1]

Since I finally have the EFI working, mostly, I will chime in.

I installed a 96 (Though I think the engine was a '97 model year, crossover point) Mountaineer into the Bronco.
Running a A9* CPU
Got a '94 Crown Vic 70mm MAF from the Junkyard. (This is off a 4.6 engine)

Works really well for the most part. I'm not very happy about the mileage. Still only getting 10MPG mixed highway and town.

Had a really weird experience in the hellhole most people call LA yesterday, where sitting is bumper to bumper traffic for 30 minuets (After driving from home for and hour an a half) the engine suddenly had a problem keeping idle, and wouldn't respond to the gas pedal. As quick as it happened it went away and no more issues.

I don't know if this is the "surge" people talk about or not. my idle normally sits dead at ~800 rpm.

I can only figure the problem comes from the stress of HEAVY traffic. (405 was a parking lot) IT has to be either fuel delivery - which I would expect to see at other than idle, or control system.

So is it the MAF? the computer trying new things? or something else, I don't know.

Any codes?

 

[ren71]

Had a really weird experience in the hellhole most people call LA yesterday, where sitting is bumper to bumper traffic for 30 minuets (After driving from home for and hour an a half) the engine suddenly had a problem keeping idle, and wouldn't respond to the gas pedal. As quick as it happened it went away and no more issues.

I don't know if this is the "surge" people talk about or not. my idle normally sits dead at ~800 rpm.

I can only figure the problem comes from the stress of HEAVY traffic. (405 was a parking lot) IT has to be either fuel delivery - which I would expect to see at other than idle, or control system.

Probably just heat related from sitting in LA traffic, possibly just mild vapor lock. I wouldnt worry about it if it doesn't come back. The surge problem people experience is more of a rhythmic surge in idle speed that happens at any temp http://www.vw-resource.com/vapor_lock.html

 

[lonicus]

Any codes?

Just the usual ones for no EGR, smog pump, etc.

Ren71: I sure hope I'm not getting vapor lock on a fuel injected engine! Though I can only imagine it had to do with the heat in traffic.

 

[Viperwolf1]

It could be vapor lock. I had some issues with that on my engine. Describe your fuel system.

 

[lonicus]

Fuel System: 24 gal single tank (Not the "EFI" type) fuel pickup runs to a low pressure 6PSI pump located next to the tank on the inside frame rail. Fuel line (3/8") runs on the inside of frame rail to driver side fender well where it is plumbed to the BC Bronco's accumulator. High Pressure pump is located on top of the drivers inner fender and runs flexible hose directly to the Fuel Rail. Return is 5/16" and runs next to the supply line, and is Tee'd into the vent line for the fuel tank.