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Silverado dies while idling #4492066
08/18/17 03:30 PM
08/18/17 03:30 PM
Joined: Dec 2005
Posts: 474
IL
LAGA Offline OP
LAGA  Offline OP
Joined: Dec 2005
Posts: 474
IL
I have a well kept 2007 Silverado NBS 6.0 with 87K miles. 6 month OCI, injector cleaner every 3-4 months, heated garage. A week ago it died while idling in a fast food drive thur. The engine would turn over, but it would not start. No CEL. It had to be towed home where after sitting for an hour it restarted. There were no codes found using a Scangauge II. The next day, it ran great until returning home and I let it idle in the driveway, and after 3 minutes it died. No CEL, No codes. It had to sit for 4 hours until it would restart. I then took it to my mechanic where after 2 days of running and idling he found no problems or codes. I took the truck back for a week and I removed and cleaned the throttle body hoping that would help. It just died again today after pulling into a parking spot at the grocery store. No CEL. It restarted only when I held the gas peddle down while cranking. I got it home and again , no codes. Any ideas? I`m thinking crankshaft position sensor. Thanks


Four legs good, two legs better!
Re: Silverado dies while idling [Re: LAGA] #4492070
08/18/17 03:34 PM
08/18/17 03:34 PM
Joined: May 2017
Posts: 27
Oklahoma
Arkandspark Offline
Arkandspark  Offline
Joined: May 2017
Posts: 27
Oklahoma
Electric fuel pump going out?

Re: Silverado dies while idling [Re: Arkandspark] #4492073
08/18/17 03:41 PM
08/18/17 03:41 PM
Joined: Dec 2005
Posts: 474
IL
LAGA Offline OP
LAGA  Offline OP
Joined: Dec 2005
Posts: 474
IL
Originally Posted By: Arkandspark
Electric fuel pump going out?
Mechanic says it fine.


Four legs good, two legs better!
Re: Silverado dies while idling [Re: LAGA] #4492074
08/18/17 03:41 PM
08/18/17 03:41 PM
Joined: Sep 2010
Posts: 7,485
S California
OneEyeJack Offline
OneEyeJack  Offline
Joined: Sep 2010
Posts: 7,485
S California
I'd start by changing the fuel filter and then looking at the fuel pump.

From there it's a matter of trouble shooting, things like the torque converter lock up solenoid and on to the rest of the fuel system after checking for leaks.

Re: Silverado dies while idling [Re: LAGA] #4492079
08/18/17 03:48 PM
08/18/17 03:48 PM
Joined: Oct 2011
Posts: 5,091
USA
NHGUY Offline
NHGUY  Offline
Joined: Oct 2011
Posts: 5,091
USA
I've seen starting issues with an Idle Air Valve sticking.It takes full throttle opening to start.

Re: Silverado dies while idling [Re: LAGA] #4492083
08/18/17 03:51 PM
08/18/17 03:51 PM
Joined: Dec 2005
Posts: 474
IL
LAGA Offline OP
LAGA  Offline OP
Joined: Dec 2005
Posts: 474
IL
Fuel filter and pump are a single unit inside of the fuel tank which has to be dropped to change.


Four legs good, two legs better!
Re: Silverado dies while idling [Re: NHGUY] #4492086
08/18/17 03:53 PM
08/18/17 03:53 PM
Joined: Dec 2005
Posts: 474
IL
LAGA Offline OP
LAGA  Offline OP
Joined: Dec 2005
Posts: 474
IL
Originally Posted By: NHGUY
I've seen starting issues with an Idle Air Valve sticking.It takes full throttle opening to start.
I`ll look into that


Four legs good, two legs better!
Re: Silverado dies while idling [Re: LAGA] #4492099
08/18/17 04:06 PM
08/18/17 04:06 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Does it die slowly, or does it die quick like if somebody turned the key off ?

Re: Silverado dies while idling [Re: Merkava_4] #4492111
08/18/17 04:18 PM
08/18/17 04:18 PM
Joined: Dec 2005
Posts: 474
IL
LAGA Offline OP
LAGA  Offline OP
Joined: Dec 2005
Posts: 474
IL
Originally Posted By: Merkava_4
Does it die slowly, or does it die quick like if somebody turned the key off ?
Slowly, and when AC kicks in.


Four legs good, two legs better!
Re: Silverado dies while idling [Re: LAGA] #4492128
08/18/17 04:37 PM
08/18/17 04:37 PM
Joined: Oct 2014
Posts: 4,040
Utah
CKN Offline
CKN  Offline
Joined: Oct 2014
Posts: 4,040
Utah
Originally Posted By: LAGA
I have a well kept 2007 Silverado NBS 6.0 with 87K miles. 6 month OCI, injector cleaner every 3-4 months, heated garage. A week ago it died while idling in a fast food drive thur. The engine would turn over, but it would not start. No CEL. It had to be towed home where after sitting for an hour it restarted. There were no codes found using a Scangauge II. The next day, it ran great until returning home and I let it idle in the driveway, and after 3 minutes it died. No CEL, No codes. It had to sit for 4 hours until it would restart. I then took it to my mechanic where after 2 days of running and idling he found no problems or codes. I took the truck back for a week and I removed and cleaned the throttle body hoping that would help. It just died again today after pulling into a parking spot at the grocery store. No CEL. It restarted only when I held the gas peddle down while cranking. I got it home and again , no codes. Any ideas? I`m thinking crankshaft position sensor. Thanks



Maybe this thread may help-

http://www.silveradosierra.com/vortec-5-3l-v8/normal-idle-t600969.html

Re: Silverado dies while idling [Re: LAGA] #4492136
08/18/17 04:49 PM
08/18/17 04:49 PM
Joined: Apr 2013
Posts: 181
Kevil,Ky
vwmaniaman Offline
vwmaniaman  Offline
Joined: Apr 2013
Posts: 181
Kevil,Ky
My daughters Nissan Sentra 2001, was doing that sort of thing. Cutting out at idle and when she would start up from a stop and when it shifted. We had replaced fuel pump and checked grounds and re grounded the ECU and replaced the TPS. Ended up being the Bosch single platinum spark plugs. Read about them not being good and causing problems. They looked perfect when I pulled them and replaced them with Autolite Platinums. No more issues at all.


Don't waste your time on a slipshod repair.
Re: Silverado dies while idling [Re: CKN] #4492141
08/18/17 04:59 PM
08/18/17 04:59 PM
Joined: Dec 2005
Posts: 474
IL
LAGA Offline OP
LAGA  Offline OP
Joined: Dec 2005
Posts: 474
IL
Originally Posted By: CKN
Originally Posted By: LAGA
I have a well kept 2007 Silverado NBS 6.0 with 87K miles. 6 month OCI, injector cleaner every 3-4 months, heated garage. A week ago it died while idling in a fast food drive thur. The engine would turn over, but it would not start. No CEL. It had to be towed home where after sitting for an hour it restarted. There were no codes found using a Scangauge II. The next day, it ran great until returning home and I let it idle in the driveway, and after 3 minutes it died. No CEL, No codes. It had to sit for 4 hours until it would restart. I then took it to my mechanic where after 2 days of running and idling he found no problems or codes. I took the truck back for a week and I removed and cleaned the throttle body hoping that would help. It just died again today after pulling into a parking spot at the grocery store. No CEL. It restarted only when I held the gas peddle down while cranking. I got it home and again , no codes. Any ideas? I`m thinking crankshaft position sensor. Thanks



Maybe this thread may help-
After doing some reading, I believe if this was the case there would be a code thrown. Thanks

http://www.silveradosierra.com/vortec-5-3l-v8/normal-idle-t600969.html


Four legs good, two legs better!
Re: Silverado dies while idling [Re: LAGA] #4492159
08/18/17 05:13 PM
08/18/17 05:13 PM
Joined: Oct 2014
Posts: 4,040
Utah
CKN Offline
CKN  Offline
Joined: Oct 2014
Posts: 4,040
Utah
Originally Posted By: LAGA
Originally Posted By: CKN
Originally Posted By: LAGA
I have a well kept 2007 Silverado NBS 6.0 with 87K miles. 6 month OCI, injector cleaner every 3-4 months, heated garage. A week ago it died while idling in a fast food drive thur. The engine would turn over, but it would not start. No CEL. It had to be towed home where after sitting for an hour it restarted. There were no codes found using a Scangauge II. The next day, it ran great until returning home and I let it idle in the driveway, and after 3 minutes it died. No CEL, No codes. It had to sit for 4 hours until it would restart. I then took it to my mechanic where after 2 days of running and idling he found no problems or codes. I took the truck back for a week and I removed and cleaned the throttle body hoping that would help. It just died again today after pulling into a parking spot at the grocery store. No CEL. It restarted only when I held the gas peddle down while cranking. I got it home and again , no codes. Any ideas? I`m thinking crankshaft position sensor. Thanks



Maybe this thread may help-
After doing some reading, I believe if this was the case there would be a code thrown. Thanks

http://www.silveradosierra.com/vortec-5-3l-v8/normal-idle-t600969.html



True-but the truck doesn't always throw the code FYI.

Re: Silverado dies while idling [Re: LAGA] #4492234
08/18/17 06:23 PM
08/18/17 06:23 PM
Joined: Nov 2016
Posts: 22
Ohio
Lignums Offline
Lignums  Offline
Joined: Nov 2016
Posts: 22
Ohio
Check your fuse box. Mine developed a short inside the fuse box itself. It would run great until it warmed up and then stall out. When testing out the wires for shorts I could shut the motor off by pushing down on the box, pulling up on it kept it running. Dealer only item is the bad news.


1998 Chevy w/t 1500 4.3
2004 Buick Lesabre 3.8
2006 Gmc envoy xl 5.3
Re: Silverado dies while idling [Re: LAGA] #4492241
08/18/17 06:28 PM
08/18/17 06:28 PM
Joined: Oct 2009
Posts: 3,514
Wet side WA
JohnnyJohnson Offline
JohnnyJohnson  Offline
Joined: Oct 2009
Posts: 3,514
Wet side WA
Originally Posted By: LAGA
Fuel filter and pump are a single unit inside of the fuel tank which has to be dropped to change.


Boy if that isn't a GM better idea to keep you coming to their shop!


2004 Corolla 126649
Out: VML 5w-30 TG4967 OCI 5007 Miles
In: EDGE EP 5W-30 Bosch 3311 122537 7-18-18
2006 Duramax 74478
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73705 4-22-18
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