mar intrigue sounds like a jet for about 30 seconds when I start it

2 messages, Last post on Apr 24, 2009 at 8:14 AM

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#1 of 2 mar intrigue sounds like a jet for about 30 seconds when I start it by oakesy25 Apr 24, 2009 (6:13 am)
and then it shuts off and everything is fine.. I believe I had this fixed before.. and it had something to do with a sensor telling the engine it was overheating so the fan clicks on..??? what is the problem and can I fix it myself.. I am not working and cannot afford a $400 mechanic bill.. I am pretty handy but not super car savy Replies to this message: 01intrigue (Apr 24, 2009 8:14 am)
#2 of 2 Re: mar intrigue sounds like a jet for about 30 seconds when I start it [oakesy25] by 01intrigue Apr 24, 2009 (8:14 am)
Replying to: oakesy25 (Apr 24, 2009 6:13 am) There is a problem with the air pump, which pumps air into the catalytic converter until it warms up. There are two valves, each of which can go bad. Replacement is about $400 parts/labor, IIRC. I've had both replaced over the last few years. My guess is that one valve is not opening completely, and thus the jet-like siren is heard. One valve is in near the overlfow bottle, below and toward the center of engine compartment. Other one is towards the front on drivers side, near air cleaner. Isolate the sound to one or the other.