Topic: 82 Toyota 4x4

[mwhite49]

I have an 82 with issues. This one had set in a field for 2 years. Rats had fun eating the wiring under the hood. I have repaired all the wiring. The original Asian carb was toast. A diaphragm on the side was putting gas right into the vacuum line. So we installed a CARB certified Weber from Redline.
Then adjusted it ant drove it for the smog test. I'm sure the cat and 02 sensor are original. It passed except for the timing. But just barley. The old distributer ate the new cap so I have added a new distributer. Still holding off on smog to correct other issues such as the air injection tube leaking even with new gaskets. So to seal that up in going to try a high temp gasket sealer next. I have the factory manual so that helps.

[mwhite49 [OP]]

And it wasn't just Rat's. It had an infestation of big black Widow spiders in the cab and under the truck. 3 bug bombs fixed that.
I have also changed the EGR valve . if the cab were in better shape I could see putting more money in it. Somehow someone had dropped something on the top center rear if the cab. They hammered it out but still needs work. So today I dropped it off at my favorite mechanic to check all my work before I take it for smog.

[mwhite49 [OP]]

I'll post some pictures after I get my 11required posts.

[mwhite49 [OP]]

I had erratic timing with the mark everywhere. I know some of this could be a sloppy timing chain. But I think mine was a shot distributer since it ate the new cap. I installed a rebuilt and the marks are easier to see with the timing light now. It's in the shop now getting looked over. If he can't time it then I'll replace the whole front cover oil pump and water pump and chain. Seems like 85.00 is the going price for a new from cover. Are they all good or are there any to stay away from,?

[toyodaaddict]

If the chain hasnt been eating at the cover and no threads are stripped, theres no need to replace the cover. I know bad grounds can effect timing on a 22re, I assume they can on a 22r aswell. It woldnt be a bad idea to polish up your grounds anyway.
Have you done a compression test? If its got good compression and your going to do the chain, Id be tempted to do the headgasket at the same time, as preventive maintenance. 

Also that diaphragm that was leaking sounds like the auxiliary accelerator pump. Its a common issue on a 35 year old carb and they are cheap to replace. Id hold on to that factory carb.

[mwhite49 [OP]]

I still have the original carb. I just got back from smog. FAILED AGAIN.
 It had a miss this time, high hydrocarbons and wss smoking bad at low speed. On the synod at high speed the smoke cleared up. Also the rebuilt distributer is junk. The top of the double vacum piece is the advance while the bottom diafram is retard. No retard at all.

[Snowtoy]

The rubber coating on the diaphragms degrade over time, you can open up your old one, and reseal the diaphragms with a layer of silicon on each side.

Rockauto sells them with rebuilt vacuum advances.
https://www.rockauto.com/en/catalog/toyota,1982,pickup,2.4l+l4,1277153,ignition,distributor,7108

[mwhite49 [OP]]

I took it back for smog this morning, failed again. Results are worse now than the first test.
Plus it is now running wide open with no pressure on the throttle and the throttle closed.

[mwhite49 [OP]]

I found the main issue wth the failures. The main throttle wss fine, but the secondary was not closing completely. Fixed that NW waiting for my New distributer.

[Jimkola]

Agreed on holding onto the Aisin carb. It was common for the AAP diaphragm to wear out, but other than that, it was a solid carb. It was pretty rare to see a Toyota carb fail beyond some fairly minor items.