I'd sort of like my next Subaru to have an EJ22 for the extra reliability and ability to hold decent freeway speeds, but I also want to burn propane in it. To me it looks like you could just pull off the injection manifold and bolt on a carb, but I don't know much in the way of gas ignitions either. Perhaps simply "spraying" a controled flow of propane into the air intake would replace the need for a fuel/air mixture?

Hardest part you'll have with converting from FI to Carb is putting in a distributor.

Most of the propane conversions (at least last-Millenium) used a "mixer" that was added to the existing carburetor/intake manifold. IIRC, typically air-cleaner mounted to mixer, hose from mixer to carburetor air-horn (replacing its air cleaner). The mixer added gaseous propane to the air stream based on airflow through the mixer; not quite "srpaying it in, but not much more complex.

 

Link to a thread on carburetion and adding a disty:

http://www.ultimatesubaru.org/forum/showthread.php?t=35174&highlight=escort+distributor

Hardest part you'll have with converting from FI to Carb is putting in a distributor.

 

doesn't msd make a distributor "simulator"?

If so, it would likely cost a lot more than a used Escort distributor and the 2 hand files you'd need to get the Escort distributor modifed

 

I just looked through the ACCEL catalog and searched on MSD's website and found nothing.

I was looking into this a while back.

you can hook up all the ej sensors and ecu but not run fuel through the injectors and have your ignition. you should run either an impco 300 or 425 mixer, Id go 300.

Doesn't a distributor tell the spark plugs when to fire? What's that got to do with changing the fuel source?

Doesn't a distributor tell the spark plugs when to fire? What's that got to do with changing the fuel source?

 

The ECM controls both fuel and spark on the EJ engines, so if you want to run propane, you either have to disable the fuel control part of it without freaking the computer out, or find some other way to make it spark.

The ECM controls both fuel and spark on the EJ engines...

What Snowman said, plus... the EJs don't have a distributor, so the ECU REALLY controls the spark on EJs.

Ford escort disty will bolt to the back of the passenger side head without much work. The aircraft guys do it a lot.

 

GD

the ECU does control spark, but unplug the fuel pump relay, turn the engine over a few times (to get rid of any fuel in the lines...), now spray some carb cleaner in the throttle body. it'll start and run for a few seconds. even rev a little (until it runs out)

 

same idea, it'll continue to get a signal from the crank and cam angle sensors, and continue to send signal to the ign coils and injectors, but there won't be any fuel at the injectors. instead it'll be coming in with the air and through the intake.

 

beyond that, I can't help you, except to say that I think it would be best to do it after the MAF....cause I bet the propane would render the sensor inoperable pretty quickly.

 

beyond that, I can't help you, except to say that I think it would be best to do it after the MAF....cause I bet the propane would render the sensor inoperable pretty quickly.

 

if your putting a propane mixer in the intake you want it as close to the throttle body as possible, you really don't want a light walled or plastic section of the intake filled with fuel/air if you get a backfire....i'd be looking for one that is stepped and fits over the end of the throttle body...thats what my one does (over a ea82t throttle body)