Chevy Jim

Hey Gents,

I swapped a 84 model 22r into my 79 Yota (20R) and I'm having huge problems getting the truck to run. I can pour gas into the carb and the truck will start and run as long as I feed it. I have checked the fuel cut solenoid, and lots of the emissions parts/valves. I'm having no luck solving this problem. Any help would be great!

Thanks

83

How's the fuel pump?

Is the only thing you changed the carb, or did you do other stuff while you were at it? Was the 22R carb known to be working well, or did you just pull if from a junkyard and bolt it on?

Did you hook the fuel lines up the pump correctly? Mechanical or electronic?

Chevy Jim

Carb was known to be running well, I have opted to use the electric pump in the tank for the moment.

Chevy Jim

Does anyone know if a 20R intake and carb will work on the 22R head? Just curious, because it seems to be alot less emissions parts that have to incorporated into the swap. And ease of use.

83

Well it just seems pretty plain that it's a fuel delivery issue. If it runs with gas poured in, but not otherwise, it's not getting fuel. So check that the fuel lines are hooked up correctly, fuel pressure is correct, etc.

Chevy Jim

Ok i will look into that area again, I have checked the fuel bowl and found fuel there. It seems to have fuel delivery to the carb ok. Thanks

83

Oh. So the carb is getting fuel, but it won't run without gas poured in? Well, you're past my expertise. I would still check that it's getting the correct fuel pressure. Otherwise I'm not sure what the issue could be, other than something just not being hooked up right.

AR_yotaing

Sounds like a float issue to me

mwisham

to answer your question, no the 20R intake will not fit the 22R head. The shape of the ports is different. You could however put the 20R head and intake on the 22R block. I have seen several posts on here that say it will give you more power. I have no personal experience doing that though.
The fuel issue does sound like it could be a stuck float if you are sure you have adequate fuel volume and pressure to the carb.

jimbyjimb

iTrader: (1)

Ditto on the float, good place to start.

As said above, the only parts on 84 and under 22R and 20R engines not directly bolt on are the intakes. The 20R intake and head are a round port, the 22R is a square.

The power gains from the hybrid mod are quite overstated. The 22R head is a better choice imo with work/DCOE or an aftermarket intake manifold. The 20R stock is superior in low end performance noticeably while not life changing.