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Discussion Starter · #1 · (Edited)
Hello all and I'd like to first say thank you for any help given me with this. I recently inherited my Grandfather's 1986 2wd automatic 22R base pickup. The truck sat for an undetermined amount of time (probably about 2-3 years) and many things need fixing (Already replaced brake master cylinder and both front calipers). The truck is bone stock and the carb was the Aisin and would not idle so I found a completely new one for $130, but it had the Kalifornia plug and not the green federal plug but I just cut and spliced those wires (simple fix). I have replaced the spark plugs with NGK BPR5EY gapped to .032, replaced the distributor cap and rotor, and adjusted the timing to 8 deg (it was well past the 12 deg mark), and changed the oil and filter. I now have it where it will idle but when I try to accelerate it bogs down almost to the point of dying, but it doesn't. If I just lightly accelerate, it'll go just fine but when you try to open it up, it just refuses and it seems to get worse as the truck warms up to NOT. I'm pretty sure I've installed my vacuum hoses back (had to replace most of them due to dry rot, but 1-at-a-time, LOL) so I don't think I have a vacuum leak. I've tried to make sure I've read as many posts as I could about carb issues, but it seem most of them turn into a "shouting match" or others say they're having the same issue but with nothing about how to fix the original issue, specifically, the fuel draining from the float bowl after a while of sitting. This carb is doing that as well and I've yet to find a solution from any forum. Also, I've tried to locate a FSM for this year but not much luck there either. I don't really want to waste money on a Haynes manual.
To recap, (A) I need help with tuning the carburetor so that the truck will accelerate without bogging as well as fixing the "draining" issue, (B) I'd like to find a FSM that covers this truck, (C) Do I need to readjust the timing back in the direction of 10-12 degrees?
Since this is my Grandfather's truck that I was tickled to get (didn't think I was going to), I really want to get it back running and driving well. If anyone could point me in the right direction I'd be grateful and again, thank you for any help!
 

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'84 2WD Pickup
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380 Posts
(A) I need help with tuning the carburetor so that the truck will accelerate without bogging as well as fixing the "draining" issue, (B) I'd like to find a FSM that covers this truck, (C) Do I need to readjust the timing back in the direction of 10-12 degrees?
Hi, and welcome to the forum. It sounds like you've made a lot of progress so far.

Various manuals are available online.

https://www.mediafire.com/?dtgp3j2qjhbm67e

http://web.archive.org/web/20101126191408/http://*******.com/fsm/index.html

A $35 carb rebuild kit will have all the gaskets and rubber parts you need to get the carb back in top shape. The procedure should be in the FSM. Clogged jets are a common problem on carbs that have been sitting. A good cleaning and reassembly with new gaskets and rubber bits may make a world of difference.

As for your poor acceleration, you should check the accelerator pump and the vacuum advance. By no means the only possibilities, but it's a start. A vacuum gauge will also give you some insight to what's happening.

The engine should run fine at eight degrees. It's never the best solution to detune timing to compensate for another problem.

It's a great little truck. I know you're going to enjoy it.
 

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Discussion Starter · #4 ·
Hi, and welcome to the forum. It sounds like you've made a lot of progress so far.

Various manuals are available online.

https://www.mediafire.com/?dtgp3j2qjhbm67e

http://web.archive.org/web/20101126191408/http://*******.com/fsm/index.html

A $35 carb rebuild kit will have all the gaskets and rubber parts you need to get the carb back in top shape. The procedure should be in the FSM. Clogged jets are a common problem on carbs that have been sitting. A good cleaning and reassembly with new gaskets and rubber bits may make a world of difference.

As for your poor acceleration, you should check the accelerator pump and the vacuum advance. By no means the only possibilities, but it's a start. A vacuum gauge will also give you some insight to what's happening.

The engine should run fine at eight degrees. It's never the best solution to detune timing to compensate for another problem.

It's a great little truck. I know you're going to enjoy it.

Thank you very much for this! I used the first link for the '83 manual but the second link didn't work. Will the '83 FSM be pretty much the same as for the '86? If so then I'm all good. The present carb is a brand new one but I'll check the accelerator pump because it could still be inop (I had to install the needle valve, spring, and float in this brand new one because it looked like the pieces were just placed in the bowl and the carb assembled. Boy, did it ever flood when I first tried to start the truck!! The fuel pump works just fine, LOL). I plan to still rebuild the old carb too. Any ideas about what the fix is for the fuel draining out after sitting for a bit? I'd LOVE to know how to stop that!
 

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'84 2WD Pickup
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Any ideas about what the fix is for the fuel draining out after sitting for a bit? I'd LOVE to know how to stop that!
I've never been inside my Asian carb. If it's like the American made carbs I've been in, there's a valve formed by a round ball in a funnel shaped seat. A speck of dirt or corrosion can keep the ball from sealing in the seat. Fuel drips out one drop at a time. When you rebuild, just tap the ball with a nail set to fit the soft aluminum seat to the ball.

All I can say is the '83 manual is right for my '84 truck. I don't know how different the '86 is. Maybe someone can chime in?
 

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Discussion Starter · #6 ·
Thank you everyone for your help! I ended up putting on a Weber 32/36 from Redline and have it tuned per the instructions. It's definitely running better, but I may have to go up a size on the idle jet since this seems to be an issue with the Webers as shipped with having a too-small idle jet (with today's fuels being a learner burning fuel), according to what I've read about how Webers are hard to tune and keep tuned. I hope I won't run into issues with this carb as I bought it to alleviate the issues with the stock carb but I will say that it is MUCH SIMPLER to play with.

Again, thank you everyone!
 
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