pulling fuses to reset issues with engine
Thread Starter
Intermediate
Joined: May 2010
Posts: 28
Likes: 0
From: Rochester ny
pulling fuses to reset issues with engine
Good day folks,
I seem to recall a discussion some time ago about there being a fuse or two to pull to force a reset of the ECM, etc. when there are various and sundry issues.
My 02 is running VERY rough suddenly. I had a CEL, but only got door module (both sides) faults. I did a reset with HP tuners scanner and the CEL went away but the door codes still show. They are History codes but won't go away.
The engine is running roughly. VERY roughly. I have to keep it revved in order to keep it running. Sounds like it's running on only a few cylinders.
Initially I thought that I had a temperature 'shut down' of the alternating fuel between cylinders but that doesn't appear to be the issue as there is no temperature problem shown.
I'm gonna clean grounds and such,
Thoughts folks? As always, thanks very much in advance.
Jim
I seem to recall a discussion some time ago about there being a fuse or two to pull to force a reset of the ECM, etc. when there are various and sundry issues.
My 02 is running VERY rough suddenly. I had a CEL, but only got door module (both sides) faults. I did a reset with HP tuners scanner and the CEL went away but the door codes still show. They are History codes but won't go away.
The engine is running roughly. VERY roughly. I have to keep it revved in order to keep it running. Sounds like it's running on only a few cylinders.
Initially I thought that I had a temperature 'shut down' of the alternating fuel between cylinders but that doesn't appear to be the issue as there is no temperature problem shown.
I'm gonna clean grounds and such,
Thoughts folks? As always, thanks very much in advance.
Jim
Thread Starter
Intermediate
Joined: May 2010
Posts: 28
Likes: 0
From: Rochester ny
This is what I have now.
I've reset the following:
B0361 H
B0441 H
B2282 H
B2284 H
B2283 H
B2285 H
I started the engine, the severe miss VERY rough running, as though 2 or more cylinders are not running.
Now I get P0300 C and that is the only code that is set.
I've read through my FSM on the P0300. Interesting stuff.
Suggestions before I tear into everything?
Thanks of course,
Jim
I've reset the following:
B0361 H
B0441 H
B2282 H
B2284 H
B2283 H
B2285 H
I started the engine, the severe miss VERY rough running, as though 2 or more cylinders are not running.
Now I get P0300 C and that is the only code that is set.
I've read through my FSM on the P0300. Interesting stuff.
Suggestions before I tear into everything?
Thanks of course,
Jim
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
You've got a low battery and a failing HVAc actuator. Clear the codes and see what comes back. Get a meter onto your battery with the ignition off and measure it. You need to see a minimum of 12.5vdc for the computers to run properly.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Tech Contributor
Joined: Aug 2008
Posts: 2,902
Likes: 21
From: Oak Hill Virginia
Start by pulling your plugs and wires and checking them out. Sounds like you might have a valvetrain issue though... GL.
Tech Contributor
Joined: Oct 1999
Posts: 41,026
Likes: 9,779
From: Charlotte, NC (formerly Endicott, NY)
Those door codes are telling you there is a voltage problem. Since both doors have the issue it is more likely that is a general issue throughout the car. A voltage problem will cause a rough engine and some weird codes at times. Checking and fixing the voltage issue is the easiest and quickest thing to do first. Fix that and the engine problems just might go away. Don't worry about the least likely things like engine mechanical problems until you fix the other issues.
Bill
Bill
Thread Starter
Intermediate
Joined: May 2010
Posts: 28
Likes: 0
From: Rochester ny
Bill, all of you, many thanks.
I have verified 12.1 volts with everything off at the battery.
I'm charging the battery overnight with a 10a charger (battery unhooked of course).
We'll see.
Thanks again folks,
Jim
I have verified 12.1 volts with everything off at the battery.
I'm charging the battery overnight with a 10a charger (battery unhooked of course).
We'll see.
Thanks again folks,
Jim
Last edited by rochesterdriver; Aug 15, 2011 at 08:25 PM.
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Yeah, 12.1 is too low. You need a minimum of 12.5 for things to run. Also, the P0300 which is a misfire on all cylinders, could be low voltage which is best to address that first. If the P0300 is still there after the battery resolution, look at the ground wiring for the coils on the rear of the driver's side head. You'll find it there and sometimes, it'll come lose resulting in a 300 code.
Thread Starter
Intermediate
Joined: May 2010
Posts: 28
Likes: 0
From: Rochester ny
David,
I charged overnight, wound up with 12.8 after the battery sat for 10 minutes. I ran the car for a minute. Still flashing the MIL. I'm concerned about running it too much in this condition and taking out a converter or two.
The only code now is the P0300. The door module codes (and all else) are gone.
Same issue. VERY rough running. Missing and noisy.
I cannot find ANY grounds running off the coil pack arrangement on either side of the car. Can you tell me more about this ground setup?
I'm fighting with my HP Tuners laptop now. Can't get it to connect to the car all of a sudden. I'll keep up with that and try to find WHICH cylinder is throwing the P0300.
Thanks,
Jim
I charged overnight, wound up with 12.8 after the battery sat for 10 minutes. I ran the car for a minute. Still flashing the MIL. I'm concerned about running it too much in this condition and taking out a converter or two.
The only code now is the P0300. The door module codes (and all else) are gone.
Same issue. VERY rough running. Missing and noisy.
I cannot find ANY grounds running off the coil pack arrangement on either side of the car. Can you tell me more about this ground setup?
I'm fighting with my HP Tuners laptop now. Can't get it to connect to the car all of a sudden. I'll keep up with that and try to find WHICH cylinder is throwing the P0300.
Thanks,
Jim
Last edited by rochesterdriver; Aug 16, 2011 at 09:56 AM.
Thread Starter
Intermediate
Joined: May 2010
Posts: 28
Likes: 0
From: Rochester ny
NOW it's all very clear to me.
The issue started with a broken valve spring on number 8 exhaust.
The valve sucked into the combustion chamber and things went to hell from there quickly.
The engine is coming out and I'll know more in a while.
sigh.
Jim
The issue started with a broken valve spring on number 8 exhaust.
The valve sucked into the combustion chamber and things went to hell from there quickly.
The engine is coming out and I'll know more in a while.
sigh.
Jim
Racer
Joined: Mar 2011
Posts: 449
Likes: 8
From: Hayes Virginia
WOW!! Sorry about your luck or lack thereof. But on the other hand now is a great time for the upgrades you might want..
By the way..How many miles do you have on that engine? I also have a 2002 and am very curious now...
By the way..How many miles do you have on that engine? I also have a 2002 and am very curious now...
Thread Starter
Intermediate
Joined: May 2010
Posts: 28
Likes: 0
From: Rochester ny
Hey Papa,
45k miles. It's my wife's car and, with HP Tuners I had set the rev limiter to 5500 just to be safe. It's an automatic.
Here's an update.
The broken valve spring on #8 caused mayhem:
It sucked the valve, took out the head, the piston, the rod.
I suppose it could have been worse.
Rich.
45k miles. It's my wife's car and, with HP Tuners I had set the rev limiter to 5500 just to be safe. It's an automatic.
Here's an update.
The broken valve spring on #8 caused mayhem:
It sucked the valve, took out the head, the piston, the rod.
I suppose it could have been worse.
Rich.
