I have been thinking about converting my '94 5.0 to mass air. I've heard the speed density system is holding back the modifications I made to the truck. Anybody done this to this year of truck, they say the firing order is different and a few modifications have to be made. Let me know what I need to do and a cheap place to get the system, I found one for $630.00. Also, I want to put on the underdrive pulleys, supposely it makes less accesory drive belt Rpms and increases horsepower. Please help me with any information. Thanks

------------------
1994 F-150 4X4 Regular Cab, 302 EFI, 5 spd. K&N Filter, Gibson Super Truck Split Rear Exhaust. Superchip

 

I talked to the SVO tech, he said that the firing order doesn't matter, "just hook it up and run" were his words. Does this sound right?

------------------
1994 F-150 4X4 Regular Cab, 302 EFI, 5 spd. K&N Filter, Gibson Super Truck Split Rear Exhaust. Superchip

 

Someone was on here several months ago that was really having a lot of trouble getting a conversion workink. Thy a search-you might find it.

------------------
97 Lariet-sc-4.6-4x off road-auto-3.55 LS-
superchip-K&N-3"
pvc air box mod-Granetelli MAF

 

Also try posting on the bulletin board at www.nloc.org. The 1st Generation lightnings also came with speed density, and many owners have converted. If you post your question there I'm sure you will get some help.

 

your lucky. you have a 5spd.you shouldn't have any trouble converting yours.I have a 97 F250 with a 5.8 and E40D automatic.the only conversion kit i can find for mine is the one for 93-95 lightings(1000 bucks!)from ford racing.All tou need to do is go to your local ford dealer(or the junk yard) and get the computer for a mass air truck,a wiring harness(Painless wiring has one),a mass air meter, and a BAP sensor to replace the MAP sensor on the fire wall(pasenger side).You will also have to replace your air box lid with one that has a single outlet,and the hoses (more parts easily found at the junk yard). GOOD LUCK!

 

pacat1, yes you can convert it. Buy the Ford Motorsport kit. The kit is designed for 88 - 93 trucks, but that is OK.. The Mustang firing order, (and you should check this on your truck by following the wires on the distributor) is 1-3-7-2-6-5-4-8. NOTE: Mustang/H.O/351W (ALL THE SAME FIRING ORDER)! It was in 94' I'm almost certain, that they converted the trucks to that firing order. Due to carry-over engines etc you should check yours. But in general 94' is the year they moved to the H.O. firing order. So in order to use the kit you will have to cut and re-solder 4 of the injector harness plugs that come with the kit. Its really easy, I did it on mine no problem (for my 95').

The kit you buy from Ford Motorsport is designed for trucks using the 302 firing order (NON-H.O.) Sorry, I dont have that in front of me.

Ford makes a kit for both Auto's AND sticks so 351W buy the F150 88-93 kit for auto's and do the 4 injector cut and solder dance and your done. The kit is like $550 I believe.

351W: Read my reply to that "top speed" post, I wanna know more about your truck.. EMAIL ME!

pacat1, as far as is speed density holding your mods back? No, you haven't done anything serious that the computer would not be able to compensate for. You have a K&N, SD will compensate for that. Then you have a Superchip (which you will not be able to reuse when you upgrade to mass air.. different computer). I do not know how good a that chip is but hopefully it corrects the truck LAZY timing. That is the biggest problem and the seat of the pants improvement you will feel when upgrading to the FMS kit is that it uses a mustang computer which has a much more aggressive timing curve. Your Superchip SHOULD already do this and my guess is you would feel nothing. BUT, if you WERE to consider more mods (cam!) THEN you would need the conversion no matter what for driveability purposes. Any more questions feel free to email me. If I had the firing order in front of me I'd be glad to tell you which 4 connectors to cut and solder. If your in D/FW I'll do it for you, its easy.

 

JerryK, I seen you did a mass air converson to your 95 truck? what trany do you have on yours?

I'm working with a 5sd 95 and i'm running into a few problems with mine. I cant get the truck to run right unless i run high timming, like around 20 with the spout disconted. if i turn the timing down, the engine feels like it his a rev limitor.

also you have any problems with a check engine light coming on? I get both a code 41 and 91, cant seem to find out why, o2 senser is new (plus tested the old one to see if it was switching, and it seemed alight) anyidea?

GT40P heads
crane 2030 533/544lift, 216/220dur
24# inj
C&L (tube for 24#)
twin 61m t-body upper matched to t-body
4.10 gears posi
headman longtubes
230rwhp 280 rwt

 

Rs4racer32

It sounds to me like you have the firing order wrong?! I did the conversion on a 95 F150 302 5 spd. The kit I bought was for 88-93 5spd (meaning the NON HO firing order). I had to convert it to the HO firing order.

Your truck stock should BE the HO firing order: 1-3-7-2-6-5-4-8. Sorry if this is basic stuff for you its obvious you have done some serious mods to the truck so it may be elementary but you never know. Someone please post the regular 302 firing order..

Anyway, start at the #1 cylinder on the distributor (should be at 12 o'clock or slightly to the left of 12 when standing at the bumper looking at the engine). Wiring goes counter-clockwise per the order above.

OTHER thing that COULD be your problem is that you didn't stab the distributor correctly and it is 1 tooth off:

put the engine at TDC on #1 (I look at teh rocker arms and check the dampner to make sure its on 0) the rotor should be pointing STRAIGHT BACK or to 12 oclock. It it is to the right or left you are 1 tooth off on teh distributor. Remove it and stab it again so that when its fully seated the rotor is STRAGHT BACK. In retrospect that is what is most likely causing the truck to run like crap not the firing order.

I didn't have any problems with check engine light, what are those codes? I might be able to help if I know the description. I don't have my Probst book, its at home and I'm on the road so I cant help.. You are welcome to email me to continue this. Regards, Jerry

 

The old 302 firing was 15426378. They figured 1 and 5 firing consecutive put too much strain on the front main.

------------------
97 Lariet-sc-4.6-4x off road-auto-3.55 LS-
superchip-K&N-3"
pvc air box mod-Granetelli MAF

 

Thanks RedLariat!

HO: 1-3-7-2-6-5-4-8
302: 1-5-4-2-6-3-7-8

So when "converting" the FMS 88-93 Mass Air upgrade kit to work on post 93' trucks w/ either 302 or 351, you need to modify the injector harness so that instead of having the 302 firing order, it works with the HO firing order. I'll go pull mine out of the attic and look at what I did if anyone wants more detail.. your modifying 4/5 and 3/7. You can see those are the differences between the two firing order. Jerry

 

JerryK, I got my kit and I see the difference in the firing order. My understanding is to switch the 5/3 and 4/7 wires so they match the HO firing order. Also, the instructions say to remove upper intake to remove the 8 fuel injector connectors, I was wondering if it is possible to do this without removing the intake? Otherwise I have to get an intake gasket and then will be ready to install. Here is my email address if you think you can give me a few pointers on the installation, pacat5@home.com. Thanks