Can you time the engine

What is your question?

The car is shaking and stauling. The spark plugs were replaced I believe it may be a distributor that needs to be replaced back wondering if you can time the engine on a Chevy S 10 blazer Tahoe 1990. It's running to rich. It's misfiring and sputtering.

What makes this problem better or worse?

Speed helps. It stalls in idle not always

How long has your 1990 Chevrolet S10 Blazer had this problem?

1 week