What you need is the computer and maf meter from the same vehicle(bassically a matched pair), and a MAF engine wiring harness that you can pull the injector and MAF wiring out of to install in your existing harness. This is the most cost effective way to do this, the fordfuelinjection site shows how the EEC harness connector comes apart to allow adding and moving wires, and you'll have to do both because a few things are on different pins on the Stangs. The only other thing you may need is a Y-pipe to collect both intake tubes to 1 for the MAF meter if using the stock truck intake, the injectors don't need to change unless you modify the motor enough to exceed their supply capacity of 300hp.

 

are there any manuals or wireing diagrams that I should look into to help? and the only reason I ask about the injectors is because I read some where that you need to add a ground jumper wire to each injector and if that wwas the case would it be easier to upgrade to a maf style injector or injector harness? thank you for the help this thing is becoming more and more clear.

 

see the wiring part of this page: bjoern.brembs.blog: Content / Ford F150 302 V8 Pickup truck (2000-2003) / - Mass-Air conversion

hopefully that will shed some more light on the subject for you as well.

 

i currently have a chilton repair manual and i hate it. is there a more detailed manual out there that may help with this swap, i still don't compeletly know where a lot of this is located, or how to distingwish between the wires.

 

Will Ford's conversion kit M-9000-T50 "Ford Racing Performance Parts [M-9000-T50*]" work on a 1995. The kit post "1987-1993" I know there isnt much change from 1993 to 95, but my luck there would be something. I have a 95 SD 302 Man. Thanks guys this is an aswome form too.

 

Yes, but if your truck uses the HO/5.8 firing order you will have to make some simple wiring changes on the overlay harness.

 

Hey thanks for the quick reply conanski. I remember reading that you used the kit your self. I do indeed have the 5.8 order 1-3-7-2-6-5-4-8. Is the wiring change covered in the kits manaul? That you remember. Also Im very pleased with my truck and how it runs and have done numerous mods. By doing the conversion do you think performance will increase? (I know it's been covered but i trust your opinion) also how about emissions. I barely passed last time. Am I setting up my self for failure or will emissions improve you think? Thanks Conanski

 

There manual doesn't mention changing the wiring because there were 2 different wiring harnesses available apparently... though I have never seen the HO version for sale anywhere. It's not a big deal anyway the change is pretty easy if you can handle a soldering iron at all. All you do is strip the silicone off the overlay harness connector block and move 4 wires, these are the ones for injector pairs 5&4 and 3&7, the only difference in the firing order is where these pairs appear in the sequence. And don't let anyone tell you this doesn't matter, it's been proven here on a couple occasions that the engine runs much better when the injector sequence matches the cam firing order.



You should not see any dramatic performance increase from the kit alone, but there may be some if the mods you have done are pushing the SD computer limits of adjustment. You should notice an improvement in throttle response and the absensce of the irritating cold start high idle. The MA system does adapt better to more agressive mods like heads and performance cams so it also opens the door for future improvements. I don't think it will have much impact on emissions either, that depends more on the general health of your motor(how much oil it burns) and the age of the cat.

 

I did a DIY MAF conversion with junk yard parts from an '89 mustang, a new Ford airbox top, and a soldering gun.

It passed a CA smog a couple of days ago.

NO was below average; CO was 0.00; HC was above average.

I've had a colder thermostat in for the last 2k miles and I had techroline additive in the gas tank for the test. That may explain the HC.

 

One thing you might want to check is the O2 sensor wiring. The newer trucks used a 4 wire O2 sensor instead of the 3-wire used by the earlier trucks. I know Justin (MustangGT221) had issues with this on his truck. The computer from the kit it set up for a 3-wire O2 sensor which doesn't seem to work with the newer 4-wire sensors.

 

Something not right there. I have been using 4-wire sensors on my truck for some time now, the O2 sensor harness down to the sensor connector actually has 4 wires in it too.

 

My truck already has MAF, but I think it is definitely a good idea for others.

 

I assume the 4-wire sensor on your '90 was stock, then. The four wire sensor gave him fits. It may have more to do with how the sensor is wired. If the 4th wire goes to the O2 sensor ground pin on the MAF computer it should work okay. If I remember this correctly, the newer trucks run the O2 sensor ground through the signal return circuit, which may be the real cause of the problem in the newer trucks, not the 4-wire sensor itself. Again, this is all from my memory, so take it with a grain of salt.

 

Yes it's stock. I also pulled part of the O2 wire harness off a scrap yard truck so I could wire in dual sensors on mine, this too was 4-wire and it was from a late '80's truck. I haven't dug into my truck yet to see exactly how the O2 is pined to the computer though.

 

How come after I completed my mass air swap on my 92 f-150 that it still idles high when cold and I get a spout circuit error...?