The connector on the switch, yes. It was loose. The round rivet holding the terminal to the switch was loose with age. The solder holds it together and gives it a solid connection. I still have surging though, probably due to a vacuum leak.
Sean Lazar thanks, I think I’m going to get a gowesty rebuilt throttle body. I also ordered the idle stabilizer. I hope between the two, that’ll fix it. Otherwise I guess it’ll be the mass airline sensor...but this process of elimination gets so expensive.
@@gregtamura3645 I have heard that throttle bodies can develop leaks. Also on thesamba.com I have seen people recommend putting a small screw in the throttle body where there is a hole to reduce the air flowing through at idle. An old throttle body can be a source of vacuum leak. So the gowesty throttle body would give you a new throttle position switch as well as solve a potential air leak. Too much air causes the engine to throttle high, and the ECU senses the high throttle, and does something to bring it down. But the engine just throttles back up again. Hence the "surging" or cycling in neutral. Right now I have my idle screw turned all the way in and it still idles high and surges in neutral like in the video... Drivable but it uses more gasoline.
Sean Lazar My vans idle flunctuates like that to an extent but only in park and neutral. Drive gears the idle drops and runs fine. But when it’s cold if I don’t have the throttle body screw up enough it won’t run in the mornings, but once it’s warm I have to lower it a turn and a half so it won’t rev so high. If I go back to the screw and lower it when it’s warmed the up and down idle goes away. My intake boot is fine, my connectors do move like that though.
Here's the fix for the switch. I just soldered the terminal connection to the round part on the terminal. www.thesamba.com/vw/forum/viewtopic.php?p=8603868&highlight=#8603868
So was the loose connector the problem? I have the same issue with my ‘84.
The connector on the switch, yes. It was loose. The round rivet holding the terminal to the switch was loose with age. The solder holds it together and gives it a solid connection. I still have surging though, probably due to a vacuum leak.
Sean Lazar thanks, I think I’m going to get a gowesty rebuilt throttle body.
I also ordered the idle stabilizer. I hope between the two, that’ll fix it. Otherwise I guess it’ll be the mass airline sensor...but this process of elimination gets so expensive.
@@gregtamura3645 I have heard that throttle bodies can develop leaks. Also on thesamba.com I have seen people recommend putting a small screw in the throttle body where there is a hole to reduce the air flowing through at idle. An old throttle body can be a source of vacuum leak. So the gowesty throttle body would give you a new throttle position switch as well as solve a potential air leak. Too much air causes the engine to throttle high, and the ECU senses the high throttle, and does something to bring it down. But the engine just throttles back up again. Hence the "surging" or cycling in neutral. Right now I have my idle screw turned all the way in and it still idles high and surges in neutral like in the video... Drivable but it uses more gasoline.
Sean Lazar My vans idle flunctuates like that to an extent but only in park and neutral. Drive gears the idle drops and runs fine. But when it’s cold if I don’t have the throttle body screw up enough it won’t run in the mornings, but once it’s warm I have to lower it a turn and a half so it won’t rev so high. If I go back to the screw and lower it when it’s warmed the up and down idle goes away. My intake boot is fine, my connectors do move like that though.
@@edstababysame here, I never got around to replacing the throttle body. I hope the new owner will. :)
Here's the fix for the switch. I just soldered the terminal connection to the round part on the terminal. www.thesamba.com/vw/forum/viewtopic.php?p=8603868&highlight=#8603868