I will try to make this brief. '90 740 GLE.

A few months back the car would just not start after say ...stopping for gas. I would un-plug the injectors, purge any excess fuel by turning the motor over ...re-plug the injectors. Sometimes I did this about three times, and eventually it would start.

Then it just started doing good ...no issues, till a week ago. So I take both relays on the passenger side shock tower and have them re-soldered at a tv shop.

The tacky material inside the female connector is pretty much gone, so I clean it out, tighten the tension on the female metal connectors, and cover them in fish tank tubing (from faq). This makes everything tight. It starts.

It did, but after a trip into town this evening it is back to its old behavior.
Coming out of store ..no start.

I check the relays, all is tight. I swap one out with a spare. Still no start. I un-plug the injectors and re-plug. No start.

But then it does! I get home as fast as I can.

Help me figure this out, please. I have owned about 5 of the 700/900 series, and the radio suppression relay was always the issue. Missing something this time around.

Tomorrow I will look at the coil, crank sensor, and the ignition control module.

Thanks for any extra input.
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"Do you think that's air you're breathing now'? (The Matrix 1999) '94 940T (463K+), 92 245 (300K+), 90 740 (148k)