Glad to see you found the issue. I had a similar issue with my 1985 928. I was pulling my hair out thinking I had a vacuum leak or other issue. It turned out to be the new throttle position sensor cable had two pin switched. Now my 928 runs like a champ. I can sympathize with you on the frustrations and joy on solving problems with these cars. The reward is when you start driving them!!
FYI. Your air filter is upside down. The hump on the filter should be up towards the hood. But, if you have run the engine a significant amount of time and there is contaminants on the top. Don't orient it correctly until you get a new one.
nice! You can connect ohmmeter to AFM and read resistance while you manually move that thingy along the contact pad. Resistance should change gradually without jumps. If there are jumps - need to replace the unit. they are not repairable really. You can try to shift (or bend) the contact needle relative to the contact pad where it is not worn. Another thing, there are plenty of european cars from 80s and 90s used this technology and these sensors can be interchangeable. just need to match the resistance range.
I did check the resistance and it seemed to be changing across the meter. I'll get it out under load here soon and see if there are any more issues with the unit
I was going to say I got some way cheaper online too, and it was the OEM (I think Continental?) brand braided. I got two sizes to replace all the vacuum hoses on my daily MkIV Golf TDI. Will get the same for my 928.
To get your camera to focus up close you need to block the background view. Some put their hand behind the item up close to block the background view. Cheers! 🍻 Great video!
Not meaning to sound harsh, this is purely my lack of knowledge. But why ( at 8:25 ) is it sounding like ... well ... like a VW van? Why the clickyclacky?
A few reasons. One, the 928 uses the exact same (l jetronic) injection as a vanagon. Two, the lifters weren't pumped up so they make a little bit of noise at first. And three, the lavalier microphone doesn't have the greatest dynamic range or reach, so the frequencies that it picks up aren't always a full range of audio.
@@ThrottleGrottoGotcha, gotcha ... cheers. Well, that's unrelated to my VWBus sounding nightmare. A tube popped off on the motorway, and I limped it (with spare oil) to the next junction but before I could get it anywhere useful the thing was sounding MIGHTILY air cooled. 😅 It's still in the shop now, but hoping to get it home soon. 🙏