your motor needs to be replaced,or it could just be the module on the motor.
Pontiac Trans Sport was created in 1990.
185 hp
It's concealed in the roof
The horn is under the left head light .
under the floor mat on the passenger side
If an automatic transmission ,broken bands in the tranny.
On the lower driver side of the radiator!
Wiring for 91 Pontiac Transport: http://www.auto-olds.ru/PONTIAC%20TRANS%20SPORT%201991.pdf
on top of oil filter housing
(4.3L) 4.5 quarts oil and filter change.
1-6-5-4-3-2
The 1993 Trans Sport is a type of Pontiac mini van. The transport weighs anywhere from 3,600 to 3,900 pounds.