2.8L problems
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Joined: Oct 2002
Posts: 90
From: Tennessee
2.8L problems
Ok, let's see if I can describe this. 
When I start my 2.8L 89 Firebird, it runs good for about 3 to 5 minutes idling at around half a grand. Then it'll jump all the way to 3000 rpms or higher sometimes. Then it'll shut off. It's Multi-port FI. I have an 88 2.8L Firebird also, it runs perfect. I've changed several sensors between the 2 and they still run the same, 89 messes up but the 88 run fine. Anyone have any idea what's going on.
When I start my 2.8L 89 Firebird, it runs good for about 3 to 5 minutes idling at around half a grand. Then it'll jump all the way to 3000 rpms or higher sometimes. Then it'll shut off. It's Multi-port FI. I have an 88 2.8L Firebird also, it runs perfect. I've changed several sensors between the 2 and they still run the same, 89 messes up but the 88 run fine. Anyone have any idea what's going on.
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