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International Automotive Technicians Network
Re: 1998 Gran Prix Supercharged Scan Data
Posted to Technical Discussion Forum on 12/1/2004

huge VACC leak...........

Look at rear of engine where you cant see anything.....Bet you will find a large vacc line off.

The reason it runs longer at cold is it will use open loop stratagie for longer to supply enough fuel to keep it running for a while..... Login to read more.