1978 fuel injection question on ECU

[tommu]

[MikeyM73]

Update - got it transferred into our name - non op, only. title is on it's way.

I'm going to source an ECU in the classifieds and start on her after Memorial Day.
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'73 Pop-top Westy, found sitting in a field for 10+ years, cleaned up, rebuilt furniture, reloved. Original 1.7 block/fully polished crank, 93mm 1.8L balanced AA pistons & cylinders, new 1.8L balanced rods, HAM 42/36 heads, Scat C25 cam & lubalobe lifters, Dual HPMX40s, R2C filters w/ Outerwears pre-filters, functioning thermostat & flaps, Pertronix Flamethrower III, 4-1 exhaust w/ Cherry Bomb 2" turbo muffler & OEM heater boxes, averages about 19-22ish on the highway.

[MikeyM73]

Hi all,

It's been a while on this so wanted to ask for a bit more assistance. So in my search for ECUs to try and fire this donor bus, I've been doing a lot of research here and think that because I have a '78 CA model, I'm limited to 77-78 ECUs due to the 7 pin AFM, which means a temp sensor is in the airflow somewhere, right? I saw the late, great, Karls past post where he tried all year combos of ECUs on his bus and they all worked but wanted to see what I could use to get it fired. I do have a 7 pin AFM for sure so can anyone tell me if I'm limited to the '77 & '78 ECUs or can I bolt one in from a 75 Federal (or any other hear, for that matter) and it should work?

Thanks, the ECU matching due to whatever variables is still a bit fuzzy.

Thanks,
Mikey
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'73 Pop-top Westy, found sitting in a field for 10+ years, cleaned up, rebuilt furniture, reloved. Original 1.7 block/fully polished crank, 93mm 1.8L balanced AA pistons & cylinders, new 1.8L balanced rods, HAM 42/36 heads, Scat C25 cam & lubalobe lifters, Dual HPMX40s, R2C filters w/ Outerwears pre-filters, functioning thermostat & flaps, Pertronix Flamethrower III, 4-1 exhaust w/ Cherry Bomb 2" turbo muffler & OEM heater boxes, averages about 19-22ish on the highway.

[sjbartnik]

I believe all the AFMs had intake air temp sensors in them regardless of pin count. You can see the sensor in the AFM, it's a little bump that sticks down into the airflow from the top of the AFM.
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1965 Volkswagen 1500 Variant S
2000 Kawasaki W650

[MikeyM73]

Thanks.. I'm mainly looking for which ECU will work just to get this thing running. Mine is a '78 CA model and from what I have researched, I think i can use ANY ECU except 79 because 79 has an 02 sensor. I think.

I'm basing this off of Karl's past statement saying that he had a box of ECUs and tried them all on his 77 and every one worked.

???
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'73 Pop-top Westy, found sitting in a field for 10+ years, cleaned up, rebuilt furniture, reloved. Original 1.7 block/fully polished crank, 93mm 1.8L balanced AA pistons & cylinders, new 1.8L balanced rods, HAM 42/36 heads, Scat C25 cam & lubalobe lifters, Dual HPMX40s, R2C filters w/ Outerwears pre-filters, functioning thermostat & flaps, Pertronix Flamethrower III, 4-1 exhaust w/ Cherry Bomb 2" turbo muffler & OEM heater boxes, averages about 19-22ish on the highway.