Cold start question/problem...
10-18-2009, 08:17 PM
#1
Cold start question/problem...
Have about 6000 wonderful miles on the G-unit so far.. love it!
Just a quick question for some of you that may have the same issue...
Every 4th or 5th startup (particularly in the cold outdoor weather when the car's engine is cold > 2 hours) I'll start her up and after about 6-8 seconds .. (once started, and it starts flawlessly) I hear a rather loud "pop"/"bang" almost like the sound of someone taking a heavy hardbound book and dropping it flat on the ground from 10 feet. I don't perceive this in the steering or footwell, it's heard, not felt.
The car otherwise drives fine, and I'm just curious what it is, if anything -- a warm engine start doesn't reproduce this symptom.
Thanks in advance and happy motoring
Just a quick question for some of you that may have the same issue...
Every 4th or 5th startup (particularly in the cold outdoor weather when the car's engine is cold > 2 hours) I'll start her up and after about 6-8 seconds .. (once started, and it starts flawlessly) I hear a rather loud "pop"/"bang" almost like the sound of someone taking a heavy hardbound book and dropping it flat on the ground from 10 feet. I don't perceive this in the steering or footwell, it's heard, not felt.
The car otherwise drives fine, and I'm just curious what it is, if anything -- a warm engine start doesn't reproduce this symptom.
Thanks in advance and happy motoring
10-19-2009, 12:13 AM
#3
Registered Member
I'd guess that the engine is starting rich and may be building up some vapor in the exhaust. Once the motor is lit, it only takes a few moments to get the exhaust hot enough to set off this unburned fuel. Nothing to worry about, but I bet it's a BEAR to reproduce!
10-20-2009, 01:52 PM
#6
Peter,
I would definitely take in to the dealer. You and I purchased our G37's at the same place, and I have to tell you that my recent problem with a Warm Start issue was resolved in full by them. It was something I expected to argue with them about, because it only happened after 2 hours of resting and always started, albeit slowly. To my delight, they duplicated the problem and worked diligently to fix it. All under warranty and with a loaner. It took 2 trips and about 1.5 weeks at the dealer, but they identified the problem and needed to wait until the injectors arrived to fix it. Your's sounds like a different problem, but you can mention the "warm start" issue to Drew in Service and he'll know the car (mine) that you're talking about. I just picked it up 2 weeks ago.
Search for the thread with my name to find a few more details of the problem I had. Drew said that Nissan (Infiniti) was very interested to get my injectors back to R&D to find out what caused them to leak.
Dave
I would definitely take in to the dealer. You and I purchased our G37's at the same place, and I have to tell you that my recent problem with a Warm Start issue was resolved in full by them. It was something I expected to argue with them about, because it only happened after 2 hours of resting and always started, albeit slowly. To my delight, they duplicated the problem and worked diligently to fix it. All under warranty and with a loaner. It took 2 trips and about 1.5 weeks at the dealer, but they identified the problem and needed to wait until the injectors arrived to fix it. Your's sounds like a different problem, but you can mention the "warm start" issue to Drew in Service and he'll know the car (mine) that you're talking about. I just picked it up 2 weeks ago.
Search for the thread with my name to find a few more details of the problem I had. Drew said that Nissan (Infiniti) was very interested to get my injectors back to R&D to find out what caused them to leak.
Dave
10-22-2009, 01:12 AM
#7
Peter,
I would definitely take in to the dealer. You and I purchased our G37's at the same place, and I have to tell you that my recent problem with a Warm Start issue was resolved in full by them. It was something I expected to argue with them about, because it only happened after 2 hours of resting and always started, albeit slowly. To my delight, they duplicated the problem and worked diligently to fix it. All under warranty and with a loaner. It took 2 trips and about 1.5 weeks at the dealer, but they identified the problem and needed to wait until the injectors arrived to fix it. Your's sounds like a different problem, but you can mention the "warm start" issue to Drew in Service and he'll know the car (mine) that you're talking about. I just picked it up 2 weeks ago.
Search for the thread with my name to find a few more details of the problem I had. Drew said that Nissan (Infiniti) was very interested to get my injectors back to R&D to find out what caused them to leak.
Dave
I would definitely take in to the dealer. You and I purchased our G37's at the same place, and I have to tell you that my recent problem with a Warm Start issue was resolved in full by them. It was something I expected to argue with them about, because it only happened after 2 hours of resting and always started, albeit slowly. To my delight, they duplicated the problem and worked diligently to fix it. All under warranty and with a loaner. It took 2 trips and about 1.5 weeks at the dealer, but they identified the problem and needed to wait until the injectors arrived to fix it. Your's sounds like a different problem, but you can mention the "warm start" issue to Drew in Service and he'll know the car (mine) that you're talking about. I just picked it up 2 weeks ago.
Search for the thread with my name to find a few more details of the problem I had. Drew said that Nissan (Infiniti) was very interested to get my injectors back to R&D to find out what caused them to leak.
Dave
Good to hear from you -- thanks for the tip -- I'll definitely let them know about your experience, perhaps there's some correlation.
What exactly did you experience with the warm start?
Thanks
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10-22-2009, 11:23 AM
#8
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Have about 6000 wonderful miles on the G-unit so far.. love it!
Just a quick question for some of you that may have the same issue...
Every 4th or 5th startup (particularly in the cold outdoor weather when the car's engine is cold > 2 hours) I'll start her up and after about 6-8 seconds .. (once started, and it starts flawlessly) I hear a rather loud "pop"/"bang" almost like the sound of someone taking a heavy hardbound book and dropping it flat on the ground from 10 feet. I don't perceive this in the steering or footwell, it's heard, not felt.
The car otherwise drives fine, and I'm just curious what it is, if anything -- a warm engine start doesn't reproduce this symptom.
Thanks in advance and happy motoring
Just a quick question for some of you that may have the same issue...
Every 4th or 5th startup (particularly in the cold outdoor weather when the car's engine is cold > 2 hours) I'll start her up and after about 6-8 seconds .. (once started, and it starts flawlessly) I hear a rather loud "pop"/"bang" almost like the sound of someone taking a heavy hardbound book and dropping it flat on the ground from 10 feet. I don't perceive this in the steering or footwell, it's heard, not felt.
The car otherwise drives fine, and I'm just curious what it is, if anything -- a warm engine start doesn't reproduce this symptom.
Thanks in advance and happy motoring
10-25-2009, 09:47 PM
#9
I've had customers in town all week and haven't logged in here since I last posted. The car is still starting normally after 3 weeks, so they definitely fixed the problem. I described the problem pretty well here:
https://www.myg37.com/forums/g37-sed...art-issue.html
Good luck and let us know if they find anything.
Dave
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