Runs fine in cold weather, but in hot weather, I hear high whine when parked with engine running and Service Engine light comes on. I replaced the original pump at about 100,000 and when it did the above, I thought it was just a bad pump and took it back in for replacement. However, this second replacement is doing the same thing now that the weather is hot.
I have climbed underneath, pulled the main harness loose, and checked the ground on the "car" end. After reconnecting, I scratched some insulation off the ground wire and checked ground on the "tank" side of the harness. Ground was solid.
have the same problem?
Saturday, June 30th, 2012 AT 8:10 PM