I have a 94 5.8 E40D, and it seems like MAF is the fisrt big thing I should do to this truck, what do I need to do to get MAF, and is there any way to not pay 700$ for it?

 

Well, the thing is this... These trucks have a much more restrictive exhaust system than they do an Air Intake system. I'm not trying to bark orders, but your money would be better spent on decreasing backpressure in the exhaust.

Ryan

 

I have heard of two remedies for exhaust and I'm not telling which I am going to do. One is to purchase a larger Cat and the other is the take the old one out and chisel out the honeycomb and put it back on.

 

I've heard of... er... other people... yeah. They shouldn't do this, but it's effective when they clear all of the goods out of the cat and send the exhaust pipe right through it. It helps it not echo too much and give the exhaust a hollow sound. Besides, having air stir around in there kills the velocity of the exhaust. Of course, you shouldn't do this. These people should be in trouble for not having usable cat converters.

Ryan

 

Headers, empty cats, and a good muffler will get the air out. MAF will get enough air in if you are staying close to stock. I believe that California had MAF in 95 and everyone else in 96. Those might be OBDII though which will create more expense. You can you a Mustang computer (A9L, A9P) if you use an AOD trans. eBay will have the stuff every now and then; I got mine for a STEAL (item #8042714800)! If you want to stay E4OD then you may want to go with the FMS package.

If you are serious, the computer that was in that auction might be what you need. I will be buying an A9L for my truck so if you can find everything else, give me a jingle and we might be able to make a deal.

Mike

 

I have been dealing with the subject of converting my 94 F150 5.8 Speed Density computer over to a MAF version due to an engine rebuild project I have been working on. Before I get into how I went about it, first answer the simple question of why? Can you do it? Yes? Is it better than Speed Density? Yes. Do the first two answers mean you should? Heck no. The big difference between MAF and SD is how airflow into the engine is measured. It does NOT increase airflow in any way. For SD computers, they have a lookup table that has predefined values for how much air is flowing into the engine given certain sensor readings, such as thottle, RPM, Vaccum, etc. A MAF computer uses a sensor to measure the airflow "directly", so it can adapt to modifications to the engine that would increase airflow. If you don't plan on making any major changes to the engine, such as new heads or long duration cams, etc. then I would stick with the SD setup and save yourself a bunch of time and money. Changes to the cat back system IMHO don't change the airflow dynamics of an engine enough to warrent a MAF conversion. However, if you do plan on making some major changes, then you plan on spending a good deal of time on your truck and spending the time on a MAF conversion would definately be helpful if not required.

What you need to make this hapen is a MAF E4OD Computer, that is ODB I, NOT ODBII. A MAF Sensor and perhaps new airbox and filter and the MAF wire harness. You can buy MAF conversion kits, but most are for 5.0 liter engines with an AOD tranny. You can reflash the chip in the computer so that it knows about the extra displacement your 5.8 has, but the transmission is going to get ya into trouble. You could purchase a separate transmission controller and piggy back it with the MAF computer.

I purchased a remanufactured 95 MAF 5.8 liter computer. Found a used MAF sensor and airbox from a salvage yard in California. Then purchased some wire harness connectors and made a conversion wire harness so that I didn't have to swap out the entire wire harness in my truck which would be a major pain, not to mention leaving me with no way to go back if things didn't work right. The magic to this entire project is the wire harness, the other items are just simple componets you can buy, with out a proper wire harness it's not going to do ya much good. If you want to know more about what I did, just write me.

Scott

 

What computer did you use for an E4OD MAF?

I have a BUG2 from a kit that I have no idea what it is good for. I will be using a A9L for mine, but the parts that I bought had a BUG2.

Does anyone need a BUG2?

Mike

 

I used F5TF-12A650-BYA which is for a 95 MAF 5.8L E4OD

For a 5.0L you could use F5TF-12A650-HB and the F5TF-12A650-GB.

 

how many o2 sensors are used with those conversions, i'm thinking about doing it and all the maf trucks i have looked at has 2 o2s, would you have to wire in another one

 

Yes, I used another 02 sensor and wired it in. Not too hard to do, just have to weld in an 02 bung on the drivers side exhaust (exhaust shop can do that) and purchase a 02 wire harness to connect to the sensor and wire it up to the correct pins of the ECU. Not a huge deal, just takes a bit of time. Many people piggy back on the existing 02 sensor, but I prefer not to cut that corner, expecially if you need to pass a smog test.

 

smog ain't a problem, lol, i'm in mississippi, not any emissions check here. But thanks for the info

 

is that for the E4OD transmission

 

Are you sure it isnt HUG2 that is what ford fuel injection said

 

Yes, that is for the E4OD transmission