Will this reset the tune
Thread Starter
Racer
Joined: Apr 2011
Posts: 320
Likes: 2
From: Philadelphia PA
Will this reset the tune
I am having starting problems with my 97 coupe after it sits for a few days. Eventually it starts but in not sure if it is a bad battery or what. The battery is stamped only a year and half old so it should be ok. The previous owner installed the lmcr already so I don't have the column lock problem. Just starting issues.
Anyway of I remove the battery to get tested if its bad will this affect my tune? Or any ideas what is causing this?
Anyway of I remove the battery to get tested if its bad will this affect my tune? Or any ideas what is causing this?
Racer
Joined: Apr 2009
Posts: 488
Likes: 2
From: Myrtle Beach SC
Removing the battery will NOT "erase" your tune.
You either have a problem with the battery, the alternator, or a parasitic drain on your battery. If I were you, I would get my battery AND alternator tested by the local auto parts store of your choice...take it from there.
You either have a problem with the battery, the alternator, or a parasitic drain on your battery. If I were you, I would get my battery AND alternator tested by the local auto parts store of your choice...take it from there.
Thread Starter
Racer
Joined: Apr 2011
Posts: 320
Likes: 2
From: Philadelphia PA
I don't think it's the alternator because once its running I don't have a problem. I'm thinking(hoping) its e battery or bad ground maybe which isn't too costly.
I'm hoping its not an electrical problem that early c5s manuals are known for.
I'm hoping its not an electrical problem that early c5s manuals are known for.
Thread Starter
Racer
Joined: Apr 2011
Posts: 320
Likes: 2
From: Philadelphia PA
Just got back.
Got the battery and alternator tested and both 100%. Now what should I look into. I've owned the car about 2 months and only happened to me twice but don't want to be stranded.
Got the battery and alternator tested and both 100%. Now what should I look into. I've owned the car about 2 months and only happened to me twice but don't want to be stranded.
Racer
Joined: Apr 2009
Posts: 488
Likes: 2
From: Myrtle Beach SC
Looks for Bill Curlee's post/thread on measuring current draw when the car is off and idle. Or, if you can't find it, it is pretty simple:
1) disconnect the battery negative terminal
2) put a multi-meter in line with the negative cable (you'll need a jumper of some sort)
3) connect that jumper to the battery negative terminal and set your multi-meter to amps
4) wait for your modules to enter "sleep mode" and then check your amp draw
5) if the current is excessive (I believe 0.2 amps is the "spec" but someone please correct me if I am wrong) then you'll want to start pulling fuses until you find the source
IIRC, the seat control module is a common source. That's the only one I can remember at the moment...sorry.
I tried to find Bill's thread on the subject but no luck..[found it, posted below]
Hope this helps!
1) disconnect the battery negative terminal
2) put a multi-meter in line with the negative cable (you'll need a jumper of some sort)
3) connect that jumper to the battery negative terminal and set your multi-meter to amps
4) wait for your modules to enter "sleep mode" and then check your amp draw
5) if the current is excessive (I believe 0.2 amps is the "spec" but someone please correct me if I am wrong) then you'll want to start pulling fuses until you find the source
IIRC, the seat control module is a common source. That's the only one I can remember at the moment...sorry.
I tried to find Bill's thread on the subject but no luck..[found it, posted below]
Hope this helps!
Last edited by sunchaser73; Apr 16, 2013 at 08:17 PM.
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Racer
Joined: Apr 2009
Posts: 488
Likes: 2
From: Myrtle Beach SC
Here's the link:
http://forums.corvetteforum.com/1567522286-post590.html
Check out the post linked above. After you run this test, you may want to post any further questions, etc., in the Tech section...if you need additional assistance troubleshooting your electrical system.
I hope it is something simple and easy!!
Check out the post linked above. After you run this test, you may want to post any further questions, etc., in the Tech section...if you need additional assistance troubleshooting your electrical system.
I hope it is something simple and easy!!
Race Director
Joined: Dec 2004
Posts: 13,760
Likes: 75
From: Haymarket VA
As these cars age, electrical gremlins are going to start popping up. Fortunately, many of them are ground related. The first thing I would do is check the ground on the right side of the engine block above the starter and the second thing is the ground on the back of the driver's side head.
Thread Starter
Racer
Joined: Apr 2011
Posts: 320
Likes: 2
From: Philadelphia PA
I'll check the grounds next. Can anyone supply a picture of where exactly the grounds are located.
Will disconnecting ground or anything affect the tune? What will affect the tune is probably the most appropriate question.
Will disconnecting ground or anything affect the tune? What will affect the tune is probably the most appropriate question.
Melting Slicks
Joined: Nov 2008
Posts: 3,146
Likes: 203
From: Edmonton Alberta, Canada
Sounds like you have a parasitic draw...something that is drawing current while car is parked. You have to do what Sunchaser 73 suggested to find what it is. Could be something as simple as glove box light on all the time. Also make sure your battery screw in posts are clean if dirty a full charge cant get to battery. Good luck
Thread Starter
Racer
Joined: Apr 2011
Posts: 320
Likes: 2
From: Philadelphia PA
Sounds like you have a parasitic draw...something that is drawing current while car is parked. You have to do what Sunchaser 73 suggested to find what it is. Could be something as simple as glove box light on all the time. Also make sure your battery screw in posts are clean if dirty a full charge cant get to battery. Good luck
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Here is where the C5 ground points are.
Thread Starter
Racer
Joined: Apr 2011
Posts: 320
Likes: 2
From: Philadelphia PA
Wow didn't realize how many grounds there were. Thanks for the diagram.
Not sure if this helps the diagnosis but my key fob, when I sync it in it works for a bit of time but the passive feature causes the thing to honk sporadically through the day and night. Then after a day or two the fob doesn't work unless I re program it. What could this be and is there any correlation?
Not sure if this helps the diagnosis but my key fob, when I sync it in it works for a bit of time but the passive feature causes the thing to honk sporadically through the day and night. Then after a day or two the fob doesn't work unless I re program it. What could this be and is there any correlation?
Melting Slicks
Joined: Nov 2009
Posts: 2,922
Likes: 219
From: West Branch, MI
While you might have some other electrical gremlins, one of the weak points of C5s are the ignition switch. You might simply have some burnt connections inside the ignition switch. Bill Curlee has an excellent write up on that. What made me think about it was when you said you'd turn the key and hold for maybe 5 seconds then it would crank. Check that ignition switch!!!