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Ask Gm Tech (Cam) Your Own Question
Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1667
Experience:  GM Grand Master Technician 2007. 14 year experience.
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I need an Emissions System Diagram for a 1994 Chevrolet

Customer Question

I need an Emissions System Diagram for a 1994 Chevrolet Lumina 3.2l that I bought cheap but, needs work on the emissions system. Missing vacuum lines is the major problem I need to solve. Any suggestions?
JA: Are you fixing your Lumina yourself? What have you tried so far?
Customer: I've beenlookingfor an emissions system diagram online with littleor no results.
JA: Anything else you want the mechanic to know before I connect you?
Customer: Just that the car lacks power after installing new spark plugs.
JA: How many miles are on the car? When was the last time the plugs were changed?
Customer: Don't know exactly how many miles on it but, since it's a 1994 model I can guess that it has high mileage. By the looks of the old spark plugs. They hadn't been changed in quite some time.
Submitted: 11 days ago.
Category: GMC
Expert:  Randall replied 11 days ago.

Hello, Lumina car or van? and what engine? its not a 3.2,Let me know, Thanks

Customer: replied 11 days ago.
Sorry about that. It'sa car and it's a 3.1l
Customer: replied 11 days ago.
I think all I need is the emissions diagram if you can help in that. Thank you.
Expert:  Randall replied 11 days ago.

the vacuum diagram is rather simple, I suppose I am asking are they missing? what is not hooked up? the EGR is electric so not vacuum controlled, I have the factory diagram of lines from Throttle body but I think you are asking for more on something