Maf Question

[RUNINAGT]

My set up consist of. Motor wise.

Stock motor.
-Explorer upper and lower intakes
- 93 Cobra TB and EGR Spacer
- u/d pulleys
- timing @ 12

Now before intakes were installed and still running stock I started to develop a lag issue on acell. It almost felt like a turbo kicks in. Now we removed the stock MAF and cleaned it and it was like a new car. Well not long after I bought a 75m MAF calibrated for 19's. Used. Put it on and I felt a little more throttle response. Anyway it worked good. Well about 3 months later the intakes and TB ect.. went on. That has been close to a year now. Well the lagging is back. so I removed the 75m and cleaned it twice. No help. Put my stock one back on cleared the symptom by about 85%.

I ordered another stock replacement to test and runs now about 99%. Don't think it will get any better than that.

Now the questions. I want to go back to either a 73m or another 75m. I have been told the stock meters off the 94-95 GT's will work, but they have the 4 bolt flange. I don't want to cut the flange or replace the air box. My cost is $80 locally for the stock 94 one. I can order one through CJ for $185 and no modifications needed.

---- Can I take the known good meter out of the stock 94GT housing and put it in the 75m tubing that I already have, even though the tubing is a tad bigger???

Thanks
"GT"

 

[jrichker]

The MAF body and sensor are designed to match each other. Therefore you can't swap sensors between different part number MAF bodies and maintain proper calibration. The assembly is designed to match the computer’s internal program, and swapping a different MAF can upset the computer's calibration.

The OEM Ford MAFs are not calibrated to injector size. The injector sizing is done in the computer’s internal programming. Aftermarket MAF’s “lie” to the computer in an attempt to fool the computer into changing the injector pulse on timing to match the increased airflow.

The only other MAF that is a one for one swap for a 93 and earlier 5.0 Mustang is the 94-95 Mustang MAF.

94-95 Mustang GT MAF - $40-$100. It is 70 MM instead of the stock 55 MM on regular stangs built prior to 94. It uses a slip on duct on the side that goes to the throttle body and a 4 bolt flange on the other. You need a flange adapter to fit the stock slip on air ducting that goes to the air box. Wiring plugs right in with no changes. *1 *2

Once your replacement 70MM MAF is in place, disconnect the battery for about 10 minutes. When you reconnect the battery and start the engine, the computer will relearn the settings for the new MAF.

*1.) Metal flange adapter http://www.kustomz.com/cat3.html Buy the TR70 for $44.95. Or spend some time on eBay looking for one that may fit.

*2.) MAF & sensor interchange
The 94-95 Mustang 5.0 MAF & sensor is also found on:
1995-94 Mustang 3.8L F2VF-12B579-A2A,
1994-92 Crown Victoria 4.6L F2VF-12B579-A2A,
1995-94 Mustang, Mustang Cobra 5.0L F2VF-12B579-A2A,
1994-92 Town Car 4.6L F2VF-12B579-A2A,
1994-92 Grand Marquis 4.6L F2VF-12B579-A2A,
Evidently the –A1A, -A2A, AA, etc. on the end of the part number is a minor variant that did not change the operating specs. You should be able to ignore it and have everything work good.

 

[RUNINAGT]

Thank you for the answer. I found out you can not swap later in the evening. Now in your opinion is it worth the extra $50 for me to by this adapter and use the 94-95 MAF with my minor build? Will I notice any gain, or just as well stay with the stock MAF?

Again thanks

 

[jrichker]

Look for the adapter at one of the auto parts like AutoZone oe even eBay. I wouldn't spent $50 unless I knew that it would fix the problem.