It’s a ‘89 350ci Suburban with a Tbi carb'. Problem: Keeps cutting out on tick over.
I’ve replaced: Fuel filter, spark plugs and leads, coil, full distributor, oxygen sensor, power steering pump, last month I replace both heads (not because of the problem). I thought this would do it, but alas I was wrong.

Motor is very strong, runs like new, no hesitation, just cuts out when stopped, I made a plate to fit on the carb’ which enabled me to adjust the tick over, but to adjust it to the point where it doesn’t cut out means setting it to a very high tick over rate.

Any advice would be greatly appriciated. BTW. You people in the USA. Stop bitching about the price of your gas, on this side of the pond we pay…..are you sitting down…….$9.20 per gal. ;o(