Service Engine Soon Light
Thread Starter
Joined: Nov 2011
Posts: 167
Likes: 2
From: California
Car: 87 irocz 305 5.0 5 speed G92 option
Engine: 305 tpi
Transmission: T5
Axle/Gears: 9 bolt 3.45 factory gears
Service Engine Soon Light
So my service engine soon light has been coming on every now and then. I was wondering can you still test for errors when the light is not on? Will they still come up?
Thx in advance.
Thx in advance.
Thread Starter
Joined: Nov 2011
Posts: 167
Likes: 2
From: California
Car: 87 irocz 305 5.0 5 speed G92 option
Engine: 305 tpi
Transmission: T5
Axle/Gears: 9 bolt 3.45 factory gears
Re: Service Engine Soon Light
So will the codes come up even tho the service engine light is not on? That's all I need to know. I can have my dad run his tester on it.
Thread Starter
Joined: Nov 2011
Posts: 167
Likes: 2
From: California
Car: 87 irocz 305 5.0 5 speed G92 option
Engine: 305 tpi
Transmission: T5
Axle/Gears: 9 bolt 3.45 factory gears
Re: Service Engine Soon Light
K thanks man gonna have him test it this weekend then.
Junior Member
Joined: Sep 2011
Posts: 46
Likes: 0
From: Strasburg, Pennsylvania
Car: 1991 Chevrolet Camaro Z/28 (Project
Engine: 5.0L 305
Transmission: 700R4 W/ B&M shift kit
Axle/Gears: 3.23
Re: Service Engine Soon Light
If it comes on randomly while driving at a certain speed it could be the egr valve mine did that but i pulled off the manifold and saw the whole part was blocked with carbon build up. it might just be vacuum line related too those are great places to start both of those has set my light off
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