Picking up a 97' 460 motor (CA model, OBD 2 with MAF). It comes with the entire engine harness also. I already have a 97 F350 ECM, so I think what I'm going to do is take the dash wiring harness out of a 96 or 97 model and that should work. I know I will need to change the connector on the transmission solenoid pack.

Anybody see any complications?

 

So you want to do a MAF conversion on your '94? Do you have the complete engine wiring harness all the way back to the PCM connector or just the portion back to the block connector? That '97 PCM is OBD1 and not MAF.

 

It comes with all the engine bay wiring. The only thing its missing is the tubing for the air intake. That's easy enough here in CA. When people snag parts for these OBDII trucks, they take the MAF housing and sensor and leave everything else. And nobody ever takes the dash wiring. So I'll just grab the inner dash shell and leave the wiring connected to it so I dont have to fuss. I just hope I can find wiring with RKE.

 

1997 Cali emission trucks w/7.5L engines are OBD-2 MAF. Unless it's over 14k GVW.

 

Exactly. Its off a 11/96 build with CA emissions. So OBDII and MAF

 

You also need the Vapor Management Valve from the donor to replace the Canister Purge valve (CANP) on your truck.

I am pretty sure the OBD-2 system uses DPFE EGR feedback instead of positional (EVP) style on your truck. Another gotcha when trying to convert to later model Engine Control systems.

 

Good to know! Where is that located on an OBDII 460?

 

VMV is located located on the blower motor case almost the same position as the MAP sensor on your truck.

DPFE requires an EGR tube with two sample ports, DPFE sensor and two silicone hoses to connect to the sample ports. The EGR valve is unique too, IIRC.

 

Already found the dpfe on RockAuto for cheap. Isn't the egr on the engine itself? Because everything besides the air intake tube is therd.

 

EGR is on the engine. Grab the EGR tube too. Very unique assuming it's DPFE. It should be.....

 

Jeff, Did you complete this obd2 MAF swap? If so how did it go? Any regrets or pointers on making it work with obd2.
Any smog testing issues to worry about?
Thanks,
Karl

 

Karl, I haven't completed it yet. My son was born in March, and it's limited my ability to have the time. But I do have a list of the parts you'll need, let me dig it up. PM me

 

Hi Jeff,
I am still trying to wrap my head around all the details.
Based on what Conanski has posted to me in another thread I am thinking I should use an obd1 pcm. The 97 F250 parts truck I had identified was sold so if I am going to source parts individually I can just buy a obd1 pcm on ebay.
Congrats on the new son! I recall after our first was born things that used to take a day took a week or two to get done.
Karl

 

Haha! This isn't my first. This is number 4! Even score. You have two options. One is what Paul said. The only problem with that is reflashing the PCM. You need to find a PCM that is a 5.0 MAF and E4OD. I believe that leaves few options. You'll need a WAY1, VEX1, or HOG0 catch code PCM and then reflash it for the needs of the 460. Also, there is fiveology racing, they have a kit that converts OBD1 speed density 460's to MAF.


1988-97 FORD F-SERIES 7.5L (E4OD) MASS AIR CONVERSION KIT - Fiveology Racing

I'm a big believer in stock options, which is why I have a 97' 460 in my garage, with the full wiring harness and intake tubing and airbox. I just need the dash wiring harness, and to weld a downstream 02 sensor bung on my catalytic converter.

Like Paul said, for OBD2 you'd need the whole engine (much easier to find than the timing cover, knock sensor, crank trigger, egr, etc on their own).

The cool thing about CA emissions, our vehicles are so old, that chnging to MAF doesn't matter. All they do is stick the sniffer up the pipe.

 

Thing is.. OBD1 PCMs are not flashable so you have to add a tuner but that's not such a bad thing if you were building up the engine anyway as it's not hard to exceed the stock tune or injectors.