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. I plan on removing the internal sensor wire from the grounding tab inside the the TB cover to the cover itself (have to adjust the tab anyway, and replace it with a female spade connector to 14 gauge wire that will go through the hole in the tb cover to another female spade connector. I'll then solder a short piece of 14 gauge wire to the main sensor wire outside of the cover and put a male spade connector on the end, and will connect the male and female outside the TB cover to simulate the plug. I think the only thing I need is a rubber grommet of some kind to seal off the wire opening in the TB cover.
Sound like an appropriate plan?
I don't think you necessarily need to seal off the wire opening in the TB cover, but some kind of grommet will be necessary to prevent wire chafing on the edges of the TB cover. An excellent plan overall in lieu of the original connection(at least until somebody 3D prints a bunch of them).
I have a suggestion.
Call 928 INTL and buy a antenna connector from a windshield,
solder it to the wire, put on some heatshrink.
then plug it into the new grommet and pin that you installed in the center timing cover
I have a suggestion.
Call 928 INTL and buy a antenna connector from a windshield,
solder it to the wire, put on some heatshrink.
then plug it into the new grommet and pin that you installed in the center timing cover
Good suggestion, as I didn't know that I could get them at all anywhere. I ordered one that should be in tomorrow.
The easiest fix would be soldering the new plug as described, since It seems there was a bad connection in the previous plug and I had already installed the female connector that goes in the TB cover. And if that doesn't work, I have my alternate fix ready, with the 14 gauge cable, spade connectors and rubber grommet.
So today I got the antenna/TB plug from 928 International and decided to install it to see how things would work without me going back in to the TB belt cover and remeasure the tension again. (I believe I am good on the tension as I measured it, adjusted it and remeasured twice with to TDC passes each. Top of the Kempf window.)
So i trimmed off the female end of the cable to create the plug to pigtail, then soldered it to the broken TB sensor wire and heatshrinked it. The interesting thing was that broken TB wire was in bad shape, as some had installed the previous plug with another pigtail connection, so off all that went. Now it is a clean, soldered wired straight to the plug.
I reinstalled it, started it up, and gave it a test drive. This is where things got peculiar. After 4 min, the TB alert came on again on the '89 digital dashboard. I accepted it from stalk, and it didn't come back. I later restarted the car and it came back again, accepted the notification, and it didn't come back. Now here's the peculiar part...before I installed the replacement plug, I grounded the wire out to a ground point, so it was not measuring the belt tension. Even when I did this, the TB alarm came on at 4 minutes, then I accepted the notification and it never came back until I restarted the car again.
Now I am thinking there is some memory issue in the digital dash. the other warning that comes up is the brake service warning, however I dont have the brake sensors as the PO removed them.
Is there a memory reset on the dash or something? Welcome your thoughts on this one.
So I have been driving it a little more and still get the initial startup TB warning, but no further alerts, so I'm going to say that my TB sensor cam cover repair was a success. I suspect the start up issue is either in the digital dashboard brain or there is a weak wire somewhere from the sensor to the CE panel, which I will inspect sometime. I may also try unhooking the battery for a while again to see if that does it.
The digital instrument cluster does have a TB warning memory. Unplugging the 12v will not reset that memory, it is stored in NV ram. But that should not make the TB alarm light up as far as I know.
Theo Jenniskens.
Thanks, Theo. This alert was also occurring when I disconnected the the wire from the TB cover and grounded it to a known ground, so my next thought is that the issue is somewhere up the wire path. However, if it was a bad wire, I would anticipate that the alert would continue to appear as it would lose ground intermittently. Now the alert only appears once, then once accepted, it never reappears.
I have the sensor on the inside, but no connector on the outside.
I obviously need to purchase a connector from somewhere, but then where does the outside wire go to connect into the system?
I see no loose wires hanging around in my engine compartment.
05-24-2018, 01:27 AM
