1990 GMC Vandura 1500 Q&A

1990 GMC Vandura 1500 Question: paparess5@aol.com

i have a gmc van 1989 it idles fast put in plug wires tps and map sencer and it steel idles around 2000 rpm -
Answer 1
Make sure there is no intake manifold leak or disconnected vacuum hose from the intake. Zee -
Comment 1
all vacum hose are in good shap coud not find any intake leaks -