i'll start engine and rigthaway rpm's go to 3000 i'll step on gas pedal and on 1996 GMC Sonoma

notting happens.rpm's still high.after driving for 20 minutes it acts normal. what is the problem.

by in Escondido, CA on October 04, 2011
1 answer
ANSWER by on October 05, 2011
SOUNDS LIKE YOU MAY HAVE A VACCUM LEAK, YOU SHOULD HAVE THE VEHICLE DIAGNOSED AS THERE ARE MANY THINGS THAT CAN CAUSE A VACCUM LEAK- HOPE THIS WAS HELPFUL RYAN MODE MODE AUTOMOTIVE 858-361-4645