Sick

Just put it on my "to do" list. I do want to get out that way and this just adds to the reasons to go.

Well to give you some credit, when switching out jets it is not much much more effort to adjust the idle while you have the sir cleaner off.

I am/was refering to the early to mid 80's when computers were first widely used in most all GM vehicles. I was the parts manager and later the service sales manager for an Olds dealer in the 80's, prom swaps was not at all uncommon. There was basically no reprogramming going on in the dealerships other than changing the prom and or resetting the ECM. There were location specific factory bulletins that indicated a prom swap if the vehicle was not normally operated in a location that it was originally shipped to.

The 4.3L V6 that GM produces won't get 18-19 MPG even if it's downhill all the way.

Just my personal experience.

On US-550 over Red Mountain pass pulling a 27' travel trailer with a

Somebody else is getting better mileage on a PT with the pedal to the metal than in easy cruising!!! Everbody said I was crazy when I reported 35+ MPG on 2 tanks chasing the tail off the thing through the hills of new brunswick and maine/vermont while getting less than 20 at the speed limit coasting out the 401 from Toronto to Montreal.

Just adjusting the idle MIXTURE could often get you by - it richens the bottom end enough to make the engine run and resond better, but does not get the full power back at higher speeds.

Pulled 17 foot Bonair to the west coast with 3.0 liter Aerostar, never below 50mph even on 4th of july pass, or is it called independence pass - can't remember. LONG STEEP SUCKER!!!!

The gas mileage depends on the rear end ratio. I believe the same transmission is in all of the Astro/GMC Safari Vans with the same gear ratios. The standard Rear axle ratio, was 3.42 but there was an optional 3.73 ratio. Makes a difference in gas mileage.

Did I ever tell you about the 14.5 lb. brook trout I caught?

Glad to hear about it ;-)