Problem with idling low and dying when stopped

JFOLSTAD

MEMBER
1994 MERCURY COUGAR
88,000 MILES

I need to know what the part is called that sits on top of the engine and carries air from the intake. It is the plastic piece that covers the engine and has the V8 4.6L badging on it. Any help is appreciated.

Thanks!

Monday, November 4th, 2013 AT 8:32 AM

5 Replies

JACOBANDNICKOLAS

MECHANIC
109,709 POSTS

Are you referring to the intake manifold? Also, have you checked for vacuum leaks and the idle air control valve (IAC)? The IAC is responsible for maintaining the engine idle speed.

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Monday, November 4th, 2013 AT 8:40 AM

JFOLSTAD

MEMBER
3 POSTS

Yea I guess it is, I took it in for a diagnostic, (check engine light) and they said that part was "broken up inside" he wanted to call it a upper engine cover, and that it was all busted up and they couldnt do a test til that was replaced, sounded fishy, it was at the end of the day and they got me for $90 diag fee. I dont hear any air under hood tho. If its leaking I cant hear it. Or see/feel it

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Monday, November 4th, 2013 AT 11:19 AM

JACOBANDNICKOLAS

MECHANIC
109,709 POSTS

If the check engine light was on, did they tell you the trouble codes they got?

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Monday, November 4th, 2013 AT 7:43 PM

JFOLSTAD

MEMBER
3 POSTS

He said they couldn't even do it because it failed a smoke test so bad

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Monday, November 4th, 2013 AT 7:45 PM

JACOBANDNICKOLAS

MECHANIC
109,709 POSTS

I would recommend a second opinion. Not saying that they are wrong, but they should still be able to pull a code from the computer regardless if there is a leak.