cam swap throwing cam position sensor code - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

MightymouseSS · 11-04-2014, 04:46 PM

I had a NF cam installed back in july. Recently ive been get a CEL for the cam position sensor. Thing is it'll come on for a few days then go away on its own. As far as drivability or hard starting these issues haven't occurred. Is this normal with a cam swap? My tuner said hes had this happen with certain grinds in the past. Any input will help CELs drive me crazy especially after being cammed.

christianchevell · 11-04-2014, 05:17 PM

no issue here..

Kelly@PCMofNC · 11-05-2014, 10:56 AM

No it's not normal to have that happen. Since the problem just occurred now and you have no hard starting/etc, I am going to assume you guys used the correct cam sprocket during the install. Is it an LS3 or an L99 to LS3 conversion?

Anthony @ LG Motorsports · 11-05-2014, 12:39 PM

When I have seen issues like this in the past, it can be a number of things.

Your cam position sensor is a magnetic pickup. So if there is a abnormal amount of metal in the oil, it will collect on the cam position or crank position sensors and block their "view" of the wheel. If the crank sensor is blocked, the car will not run. If the cam sensor gets bad enough it will be hard to start but the car will still run.

My suggestion first is to not drive the car until you can get to the front cover and pull the sensor out. Check to see if it has metal on it, or if it has had contact with something.

The other thing that can happen is the cam gear can come loose, and that will walk forward hitting the sensor. If that is the case, then you need to fix it, and do not drive or start it, until it is finished.

MightymouseSS · 11-05-2014, 03:23 PM

Quote:

Originally Posted by Kelly@PCMofNC

No it's not normal to have that happen. Since the problem just occurred now and you have no hard starting/etc, I am going to assume you guys used the correct cam sprocket during the install. Is it an LS3 or an L99 to LS3 conversion?

Its an ls3 and a new 3 bolt sprocket was installed.

MightymouseSS · 11-05-2014, 03:28 PM

Quote:

Originally Posted by Anthony @ LG Motorsports

When I have seen issues like this in the past, it can be a number of things.

Your cam position sensor is a magnetic pickup. So if there is a abnormal amount of metal in the oil, it will collect on the cam position or crank position sensors and block their "view" of the wheel. If the crank sensor is blocked, the car will not run. If the cam sensor gets bad enough it will be hard to start but the car will still run.

My suggestion first is to not drive the car until you can get to the front cover and pull the sensor out. Check to see if it has metal on it, or if it has had contact with something.

The other thing that can happen is the cam gear can come loose, and that will walk forward hitting the sensor. If that is the case, then you need to fix it, and do not drive or start it, until it is finished.

Im taking my car back to southwest speed next Tuesday to have Ivan look into the problem. Hopefully it's not something catastrophic like other cammed cars have experienced lately especially with comp cores.

trw427ss · 11-05-2014, 04:34 PM

What code is it giving you?

MightymouseSS · 11-05-2014, 04:48 PM

P0340

CWI · 11-05-2014, 06:55 PM

Quote:

Originally Posted by MightymouseSS

P0340

Could be anything in the "circuit"

Look for any loose connections first. Can you clear the code? How soon does it come back?

MightymouseSS · 11-05-2014, 07:51 PM

The code will come up then go away on its own. But when I scan it I get the p0340 cmp code.

BLACK10 · 11-05-2014, 08:02 PM

Ivan will get you fixed up. Im sure its something simple.

MightymouseSS · 11-05-2014, 08:56 PM

Quote:

Originally Posted by BLACK10

Ivan will get you fixed up. Im sure its something simple.

Im confident Ivan will figure it out. Just wanted to see if anyone else had the same issue. Especially since I gotta tow my car 4 hrs to get the car to SWS. Ill be going back this Tuesday and mean while having a few other things done. Hopefully my next trip to SWS will be to have an ECS s/c installed and tuned.

MightymouseSS · 11-05-2014, 09:44 PM

Quote:

Originally Posted by CWI

Could be anything in the "circuit"

Look for any loose connections first. Can you clear the code? How soon does it come back?

The code can be cleared. Its come up twice this month, so I cant give you a set time or mileage its pretty much random. Last time I was going across town code came up and on the way home it cleared itself. I dont wanna drive it till I get it checked out. I got a new sensor just in case.

MightymouseSS · 11-12-2014, 01:39 PM

No metal or any contact on the sensor. Ivan at SWS is replacing it with a new sensor.

11-04-2014, 04:46 PM	#1
MightymouseSS Drives: 2011 LS3 Join Date: Jan 2012 Location: el paso tx Posts: 547	cam swap throwing cam position sensor code I had a NF cam installed back in july. Recently ive been get a CEL for the cam position sensor. Thing is it'll come on for a few days then go away on its own. As far as drivability or hard starting these issues haven't occurred. Is this normal with a cam swap? My tuner said hes had this happen with certain grinds in the past. Any input will help CELs drive me crazy especially after being cammed. __________________ Vararam Stainless Works Headers Vmax TB SLP loudmouth 2 Nightfury Cam Mike Norris CC Tuned by Southwest Speed

11-04-2014, 05:17 PM	#2
christianchevell old school chevy rodder Drives: 2013 2SS/RS Manual,DM exhaust,CRT Join Date: Jul 2012 Location: Oregon Posts: 5,587 View My Garage	no issue here.. __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data, Carbon, Nav, RotoFab Dry CAI, Elite x2, Borla ATK, Driveshaft shop

11-05-2014, 04:34 PM	#7
trw427ss Drives: 2013 2SS/RS L99 Join Date: Oct 2012 Location: Denham Springs La. Posts: 811	What code is it giving you? __________________ 2013 2SS/RS L99/A6 Crystal Red Metallic Tincoat 12.76@108.98mph Bone Stock 12.46@111.19mph with New Era CAI & U/D Pulley 12.12 @ 114.16 after Stainless Power headers and no tune yet on stock P-Zero's! 12.007@ 115.20 With 18" Drag Radials - 11.93 @115.19 Added a PTB 11.76 @116.59 With Yank SS3200 Converter - 11.63 @116.52 After PI and Tuning 11.44 @118.75 New Best 10.72 @127.93 after heads and Cam and Yank SS3600

11-05-2014, 04:48 PM	#8
MightymouseSS Drives: 2011 LS3 Join Date: Jan 2012 Location: el paso tx Posts: 547	P0340 __________________ Vararam Stainless Works Headers Vmax TB SLP loudmouth 2 Nightfury Cam Mike Norris CC Tuned by Southwest Speed

11-05-2014, 07:51 PM	#10
MightymouseSS Drives: 2011 LS3 Join Date: Jan 2012 Location: el paso tx Posts: 547	The code will come up then go away on its own. But when I scan it I get the p0340 cmp code. __________________ Vararam Stainless Works Headers Vmax TB SLP loudmouth 2 Nightfury Cam Mike Norris CC Tuned by Southwest Speed

11-05-2014, 10:56 AM	#3
Kelly@PCMofNC Drives: 2010 RS/SS Join Date: Dec 2010 Location: Mooresville, NC Posts: 959	No it's not normal to have that happen. Since the problem just occurred now and you have no hard starting/etc, I am going to assume you guys used the correct cam sprocket during the install. Is it an LS3 or an L99 to LS3 conversion?

11-05-2014, 12:39 PM	#4
Anthony @ LG Motorsports Drives: 1994 1LE / 2006 Z51 Corvette Join Date: Jul 2009 Location: Plano, TX Posts: 2,829	When I have seen issues like this in the past, it can be a number of things. Your cam position sensor is a magnetic pickup. So if there is a abnormal amount of metal in the oil, it will collect on the cam position or crank position sensors and block their "view" of the wheel. If the crank sensor is blocked, the car will not run. If the cam sensor gets bad enough it will be hard to start but the car will still run. My suggestion first is to not drive the car until you can get to the front cover and pull the sensor out. Check to see if it has metal on it, or if it has had contact with something. The other thing that can happen is the cam gear can come loose, and that will walk forward hitting the sensor. If that is the case, then you need to fix it, and do not drive or start it, until it is finished.

11-05-2014, 08:02 PM	#11
BLACK10 Drives: 2010 CAMARO. 10.04@133mph, 1.4 60' Join Date: Jul 2009 Location: Lafayette, Louisiana Posts: 4,585	Ivan will get you fixed up. Im sure its something simple.

11-12-2014, 01:39 PM	#14
MightymouseSS Drives: 2011 LS3 Join Date: Jan 2012 Location: el paso tx Posts: 547	No metal or any contact on the sensor. Ivan at SWS is replacing it with a new sensor. __________________ Vararam Stainless Works Headers Vmax TB SLP loudmouth 2 Nightfury Cam Mike Norris CC Tuned by Southwest Speed