service engine light
Thread Starter
Burning Brakes
Joined: Apr 2014
Posts: 828
Likes: 189
service engine light
I just got done a cam swap. Initially, everything was fine. Now I have a service engine light and a rough idle. Its acting like a misfire spark plug or injector. Like its only running on 7. Anyway, how do I read the codes? Its a 96 which has OBDII.
Thanks
Thanks
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
Autozone should be able to scan the codes for free.
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
Thread Starter
Burning Brakes
Joined: Apr 2014
Posts: 828
Likes: 189
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
I have never used a spark plug with 4 ground straps on a cammed engine. However, I did read that it was not recommended to use them. If I were you, I would stick with the stock AC delco plugs. That way it rules out the plugs being a problem.
You may have chosen a heat range that was too cold for your engine.
You may have chosen a heat range that was too cold for your engine.
Thread Starter
Burning Brakes
Joined: Apr 2014
Posts: 828
Likes: 189
I have never used a spark plug with 4 ground straps on a cammed engine. However, I did read that it was not recommended to use them. If I were you, I would stick with the stock AC delco plugs. That way it rules out the plugs being a problem.
You may have chosen a heat range that was too cold for your engine.
You may have chosen a heat range that was too cold for your engine.
I'll change the wires too. They have some whitish deposits in various places suggesting they might be arching. The thing is, they were not misfiring prior to the cam swap. Maybe these Bosch plugs have a higher resistance and now the marginal ignition wires are acting up.
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Thread Starter
Burning Brakes
Joined: Apr 2014
Posts: 828
Likes: 189
First of all, I'm a dumb ***!
I had #'s 4 and 6 ignition wires backwards at the dist cap. I'm surprised it wasn't popping or backfiring and I though the rougher idle was due to the bigger cam. Anyway, all good now.
I had #'s 4 and 6 ignition wires backwards at the dist cap. I'm surprised it wasn't popping or backfiring and I though the rougher idle was due to the bigger cam. Anyway, all good now.
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
Glad you figured it out though. Enjoy the car!
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
When you have two wires crossed like that the spark comes at the wrong time and those cylinders don't fire. You're running on 6 cylinders. That's why it runs rough. If you pulled the plugs you would find those two wet with fuel because it's not being burned.