Anyone know approximately how many feet of vacuum line I'll need to redo all the lines on an 80 20R? Also, are the lines all the same size?

 

Anyone?

 

20 ft of "Armormark" 4.0mm vacuum tubing took care of all my carb lines a few weeks back. Got it at Autozone.

 

1/4" most likely and 6-8 feet as its not expensive

20 feet? You use all of it?

:wabbit2:

 

Had to use all of it...had to replace every single line.

 

I finished replacing all the vacuum hoses yesterday. Took pretty close to 30 feet! All those different lengths of line really add up quickly.

The size hose that worked for me turned out to be 7/64". All the hoses expect for one were the same size. The guy at the parts counter gave me a small piece to try of each size (4mm and 7/64 in) and 7/64 seemed to work the best. I suspect the original size was 3.5mm from Toyota, but they, nor any of the other parts places I called, had it in stock. 7/64" fits snugly, but 4mm was just too loose.

A while ago, I had posted about my engine dieseling after turning it off. After replacing all the lines, that problem seems to have gone away. I also notice that the engine seems to be a little more responsive and the idle "jitters" are almost non-existent. I didn't notice any gaping cracks or holes in any of the hoses removed, nor were any found disconnected, but I figured after almost 300k miles it couldn't hurt to change them and I suspect this will help regain what fuel economy I have seen disappear over the past few years.

 

I've been having the same problem on my '78 since I bought it. I've been doing some reading on here and toyotaminis and one of the best ideas I came across was to replace the hoses.. lots of carbon buildup in them lines. Also going to rebuild the carb. the 20r has a great reputation so I'd be surprised if most issues (short of engine blowing up) weren't caused by periodic routine maintenance-related items.