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Old 08-23-2003, 06:47 PM
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need2speed need2speed is offline
Join Date: Dec 1999
Location: Edmonton, Alberta, Canada
Posts: 1,253
Another item to check is the air injection pump, which runs for about 3 minutes at startup. I had a persistent ticking as well and when my mechanic disconnected the pump the ticking went away!

Left it disconnected (causes no running problems but may violate air quality laws - check local statutes) but after a few weeks the check engine light went on cause it was registering as a fault. Reconnected the pump and put up with the noise for the first few minutes every morning.

After about a year the ticking noise went away....go figure?
Dean Albrecht
"Lead, follow, or better yet, get out of the way!"E500 owners motto
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