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Old 10-04-2012, 08:32 AM
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Default Flashing check engine light

Driving down the highway this morning, the engine light starting FLASHING. Car running rough. Got off highway, and then the engine light was solid on. But engine is still running rough.

30 miles from home, where my scanner is.
2 weeks ago I changed the plugs, but the car was running pretty good.

I have to pull the codes, but what would cause the engine light to flash ?


and it's all stock. 100 percent, including the air pump.
1996
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Old 10-04-2012, 08:40 AM
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A flashing MIL usually means there is a misfire. I would suspect your wires and cap/rotor if just plugs are new. If it was wet out when your light came on, I would check your opti vent hose and make sure it is working.
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Old 10-04-2012, 08:41 AM
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Default Flashing check engine light

A "flashing" CEL is more serious. Check misfire codes. 307=cylinder 7,etc...Plug wire may not be fully seated (very common) or in my case,the ends of my spark plugs are threaded and were loose.
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Old 10-04-2012, 08:48 AM
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The same thing recently happened to a fellow SS owner, ended up being the #7 spark plug wire fell onto the exhaust manifold and melted the plug wire. The nylon zip-tie had broken and the wire just dropped to the exhaust manifold.

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Old 10-04-2012, 09:16 AM
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you the man !! #7 plug wire hanging loose. Guess I used too much dilectric grease on 16 year old plug wires.

This is one car I will NOT do plug wires on. I had a set, and I sold them.

Hopefully the wire goes back on, and stays on.
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Old 10-04-2012, 09:38 AM
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I drove about 3 miles on 7 cylinders. Do you think I fouled the plug ?
Is this going to keep popping off ?

I also noticed the last exhaust manifold bolt is missing it's head.
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Old 10-04-2012, 10:03 AM
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Default Flashing check engine light

Plug should be fine.I noticed on mine the spark plug wire wasn't "snapping" on to the plug very securely. So,I "tweaked" the connector with some needle nose pliers. Hasn't come off since.
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Old 10-04-2012, 10:22 AM
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The plug should be fine.

Why won't you do the plug wires? They aren't very difficult and most people re-route them away from the block instead of using the factory brackets because they are such a pain. Many folks have just cut the originals out and re-routed the new plug wires the way they want to. I've had no issues.

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Old 10-04-2012, 02:35 PM
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I pushed it back on, and it's running fine. I will "adjust" the plug wire end over the weekend. I cleared the code.

Changing wires... I still have the air pump. And it looks like a monsterous task to get them behind the air pump, and in the factory looms. Look like the water pump needs to come off too. Certainly doesn't look like an enjoyable task.

I remember years ago, it was a toss up between MSD and Taylor. But I havn't seen anything more recent.
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Old 10-04-2012, 03:22 PM
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Default Flashing check engine light

I'm very happy with the MSD wires. Excellent fit. Why do you want to keep the AIR pump? When it's so easy to get rid of.
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