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How to fix 96 Cadillac Deville wants to stall and rough idle

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Hi everyone I have a 96’ Cadillac Deville with a 4.6 Northstar engine. Just the other day my mass air flow sensor went out I replaced that, then my dash show the “Idle Air” message so I replaced the Idle Air Flow sensor but now my car feels like it wan The to stall when coming to a red light or stop. Does anyone have the same problem or knows how to fix this?

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  • 2 weeks later...

Explain what you mean by, your mass air flow sensor 'went out'. 

What code were you getting?

What symptoms were you getting?

What was the full 'idle air' message?  What code were you getting?

It sounds to me that you are parts replacing.

What codes are you getting currently?   You should do nothing without checking for codes first.

Have you disconnected the battery to let the system go through a relearn?

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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