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Tuning / Diagnostics -- engine and transmission Tune and diagnostics for engines and auto transmission.

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Old 06-17-2011, 09:22 AM   #1
buelldude
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Hard to start?

So my LS3 powered 2010 Camaro is having an issue, its starting hard. Here is the info on the problem
1. Car is cold and I have to go someplace- it starts fine
2. Car starts hard after I have driven it to another location and yes the car is warm. I have to let the car crank over twice as long (sometimes longer) as when it was cold
3. Last time it was in the shop I had them check number #7 plug because it was a dark color and gummy. (I had pulled the plugs to put on my shorty headers)

What do you think?
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Old 06-17-2011, 09:54 AM   #2
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I noticed over time a little bit of this...

Cold starts are perfect, then after I go somewhere for just a little bit, and when I restart and crank, it hesitates slightly,kinda like it wants to die... but still starts...

I dont know if its me, or something but switched a tune and seems to happen less or not at all ?!
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Old 06-17-2011, 02:09 PM   #3
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check and watch your fuel pressure ...... I have personally seen it actually rise when key is cycled off . Then after initial attempt to start it drops back down and fires up......Dont know why...still figuring that part out
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Old 06-21-2011, 08:57 PM   #4
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What's done to the car?
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Old 06-22-2011, 04:48 AM   #5
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????

Well here is a thread that I started back in 09. It just know started to get bad again. It was never bad enough to take in till now.

http://www.camaro5.com/forums/showthread.php?t=46987

That was before I did anything to the car. I have put on these things since it started.

drop in filter- K&N
shorty headers -DT
catback -flowmaster
skipshift bypass
tint- I don't think its that
hurst shifter -I really don't think its that
gas- 863 gals (give or take) not that either

That is all that has been done to the car, other than maint and driving
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Old 06-22-2011, 05:11 AM   #6
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Please keep us posted on this.
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Old 10-25-2011, 07:05 AM   #7
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going to the dealer for the second time with this problem, they found nothing the first time?????
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Old 10-26-2011, 01:53 AM   #8
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Ive seen fuel pumps do this alot when they get weak.
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Old 10-27-2011, 04:50 AM   #9
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Ok, here is an update to this problem. The dealer still can't find anything and told me to use tier-1 gas. It did it again this morning on the way into work, but they can't seem to get it to do it when they have the car.
I have been starting cars for 30 years now and I think I have it down, they said there is nothing wrong????? A few other people that have read this and I have talked to say its a leaky injector, I did pull plug #7 a year ago and found black gue on it and replaced it (the dealer did). The rest of the plugs were pulled and they are fine (med grey).


here is a link to my first post in 09, I just found it. Sorry for the repost
http://www.camaro5.com/forums/showthread.php?t=46987
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Old 11-08-2011, 04:11 PM   #10
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?????

Well here is another update; I can only tell you what they did. The reasons for it still is with the dealer/tech.
1. Battery replaced- they had a reading that should have been around 12-14 volts and it was only 8.9. I think it was for the ECM????
2. All the injectors- when being replaced they found a small amount of gas that had leaked out. I don't know where the leak was.

The car didn't act up the morning after for the 1st thru the 3rd test drive; they were thinking it was fixed. That afternoon another drive around the block said otherwise when they parked it and tried to restart it. The car started hard like it has been doing for the last two years, I will say the dealer is keeping me updated. The dealer is Hampton Chevrolet, Hampton VA.
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Old 11-08-2011, 04:31 PM   #11
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Well at least it's happening for them, so they can't say nothing's wrong anymore.
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Old 11-24-2011, 07:06 AM   #12
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Are you tip starting the car, or holding the key until it fires? These cars use tip start meaning you can just flick the key forward and let go, and it will crank until it fires up on its own. You don't have to manually keep the starter engaged anymore. I've found they start a lot better when you tip start them. I assume keeping the key forward puts extra electrical drain on the system while cranking.
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Old 12-12-2011, 06:49 AM   #13
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Update----- GM is sending someone down to look into it. They still don't know what is going on. The dealer has done a good job with keeping me notified with everything that is going on. I have the car now and its still doing the same, I will know more sometime in the near future.
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Old 05-05-2013, 01:07 PM   #14
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Any resolution to this problem? My 2010 CAMARO built in April 2009 has the same problem.
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Old 05-05-2013, 01:19 PM   #15
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Read the thread I started. Not sure if you have a similar problem. My car was in the dealership many times for a slow difficult starting issue and they couldn't figure it out.
http://www.camaro5.com/forums/showthread.php?t=293546

I ended up putting in a new starter (on my own) and now my car starts pefectly.
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Old 05-05-2013, 01:37 PM   #16
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Thanks for the quick reply. I going to print this all out , and take it to my dealer.
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