I would take it back and have LG double check the tune.
[Z06] Check engine flashes for a couple seconds..
Thread Starter
Instructor
Joined: Jan 2010
Posts: 196
Likes: 0
From: Niceville Florida
Check engine flashes for a couple seconds..
Hows it going everyone. I've been looking around and don't think anyone has had this problem. When I'm warming the vette up in the morning, the check engine light flashes between 5-30 seconds, then goes away.
No driveability issues whatsoever and no codes found. It was like that before I had it tuned at LG and figured it would go away after being tuned, but it hasn't. Is this something I should worry about? Any of you have this problem?
ONE MORE THING.... My car runs smooth, idles fine, and screams bloody murder when I punch it with no hiccups. The problem is that after full throttle runs, the idle drops a little lower than normal 400-500 rpm VS. 900-950 RPM. Any thoughts?
Thanks for taking a look at my issues and I look forward to any responses you may have..
No driveability issues whatsoever and no codes found. It was like that before I had it tuned at LG and figured it would go away after being tuned, but it hasn't. Is this something I should worry about? Any of you have this problem?
ONE MORE THING.... My car runs smooth, idles fine, and screams bloody murder when I punch it with no hiccups. The problem is that after full throttle runs, the idle drops a little lower than normal 400-500 rpm VS. 900-950 RPM. Any thoughts?
Thanks for taking a look at my issues and I look forward to any responses you may have..
Lifetime NCM Member #2497
Joined: Jan 2008
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From: Indiana
Cruise-In 9-10-11-12 Veteran
Thread Starter
Instructor
Joined: Jan 2010
Posts: 196
Likes: 0
From: Niceville Florida
Because it wasn't tuned properly after the cam installation and was running rich, do you think that it may have killed one or more of the spark plugs? Wires? Would that be something worth checking on my end before having to drive 3 hours back to LG?
Thanks for the advice guys.
Thanks for the advice guys.
Instructor
Joined: Apr 2008
Posts: 163
Likes: 0
From: Centreville VA
A flashing CEL does indicate a misfire.
Depending on how long you ran it too rich after the cam was installed, you may have wiped out some rings.
I wouldn't suspect wires or plugs for a cold start related item... those usually cause problems while loading the engine. If it isn't rings, you may need to have the cold start tables adjusted... does it fire right up or is it hard to start?
My suggestion would be to perform a compression test (at minimum) then a leak down test. You can purchase those tools at your local parts store for cheap, and it doesn't take long to do.
Depending on how long you ran it too rich after the cam was installed, you may have wiped out some rings.
I wouldn't suspect wires or plugs for a cold start related item... those usually cause problems while loading the engine. If it isn't rings, you may need to have the cold start tables adjusted... does it fire right up or is it hard to start?
My suggestion would be to perform a compression test (at minimum) then a leak down test. You can purchase those tools at your local parts store for cheap, and it doesn't take long to do.
Drifting
Joined: Oct 2009
Posts: 1,438
Likes: 4
From: Always in my lane.
If you have a cold-air induction system of some kind (Blackwing, Vararam, Haltech, etc.) ,check the clamps that connect everything together. Sometimes they will loosen up . Just tighten the clamps up just to be sure. That could be the issue.
Thread Starter
Instructor
Joined: Jan 2010
Posts: 196
Likes: 0
From: Niceville Florida
A flashing CEL does indicate a misfire.
Depending on how long you ran it too rich after the cam was installed, you may have wiped out some rings.
I wouldn't suspect wires or plugs for a cold start related item... those usually cause problems while loading the engine. If it isn't rings, you may need to have the cold start tables adjusted... does it fire right up or is it hard to start?
My suggestion would be to perform a compression test (at minimum) then a leak down test. You can purchase those tools at your local parts store for cheap, and it doesn't take long to do.
Depending on how long you ran it too rich after the cam was installed, you may have wiped out some rings.
I wouldn't suspect wires or plugs for a cold start related item... those usually cause problems while loading the engine. If it isn't rings, you may need to have the cold start tables adjusted... does it fire right up or is it hard to start?
My suggestion would be to perform a compression test (at minimum) then a leak down test. You can purchase those tools at your local parts store for cheap, and it doesn't take long to do.
Ahhhh--
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Thread Starter
Instructor
Joined: Jan 2010
Posts: 196
Likes: 0
From: Niceville Florida
I'm just wondering why it happens only on a cold start, NOT all of the time, and lasts for only 5 seconds to 30 seconds at a time. It has never happened during any type of acceleration..
Instructor
Joined: Apr 2008
Posts: 163
Likes: 0
From: Centreville VA
There are probably step-by-step instructions on the site somewhere.
Since it fires right up, you may have a cam or crank sensor going bad or something. Maybe take it back to whomever did the cam install and have them check it out?? I start misfire problems with a compression test is why I suggested it.
Last edited by VTME13; Mar 8, 2010 at 08:42 PM.
