What if cam was installed 1 Tooth off advanced! - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Reelgrinder · 11-20-2014, 07:22 AM

Just wanted some ideas on what to look for if cam was installed a tooth off advanced. It runs great, makes really good power but has idle issues.

Tried to look for vacuum leak by spraying around all intakes and TB. no changed to the idle used about 4 cans..

Start the car idles fine once you start moving and then come to a stop the idle will surge a few times and hang at about 11 -1200 rpm then falls to 900 where it supposed to be at. It will not surge again til car moves.. even if you rev the motor it will not surge.

The surging is worse with clutch out coming to a stop vs clutch in.

We turned the long term fuel off and it ran perfectly for about 30 min. The best it has ever has with no problems, then the CK light came on at a stop light and I saw the idle bump up for a sec.. and it did ok for about 5 miles, but, now when you press the gas the the motor chokes out and tries to die and it smells like its running to rich.

I let cool down and it ran ok the next day with only a little hesitation when u press the gas but it was drivable to get to the tuner. It didn't try to die when you pressed the gas like the night before..

while your on the throttle or keeping the car at 2000 rpm above it runs perfect.. but let off or try and keep it at a constant rpm it kinda buckles abit and slight hesitation.

The scanner just showed 02 to long to warm up.

Some people say cam is too big for the eforce..
Some say vacuum leak still
Some say cam mau be a tooth off.

If there is no vacuum leak and the tuner(s) yes tuners lol can't figure it out is there some part that or wire problem a new TB helped it alot.

Would the car run so well if it was a tooth off and do what its doing at idle only?

Brett V. · 11-20-2014, 07:36 AM

If it's a tooth off I suspect you would be having more issues than just at idle

Sent from my iPhone using Tapatalk

SuperchargedStealth · 11-20-2014, 09:02 PM

Quote:

Originally Posted by Reelgrinder

Just wanted some ideas on what to look for if cam was installed a tooth off advanced. It runs great, makes really good power but has idle issues.

Tried to look for vacuum leak by spraying around all intakes and TB. no changed to the idle used about 4 cans..

Start the car idles fine once you start moving and then come to a stop the idle will surge a few times and hang at about 11 -1200 rpm then falls to 900 where it supposed to be at. It will not surge again til car moves.. even if you rev the motor it will not surge.

The surging is worse with clutch out coming to a stop vs clutch in.

We turned the long term fuel off and it ran perfectly for about 30 min. The best it has ever has with no problems, then the CK light came on at a stop light and I saw the idle bump up for a sec.. and it did ok for about 5 miles, but, now when you press the gas the the motor chokes out and tries to die and it smells like its running to rich.

I let cool down and it ran ok the next day with only a little hesitation when u press the gas but it was drivable to get to the tuner. It didn't try to die when you pressed the gas like the night before..

while your on the throttle or keeping the car at 2000 rpm above it runs perfect.. but let off or try and keep it at a constant rpm it kinda buckles abit and slight hesitation.

The scanner just showed 02 to long to warm up.

Some people say cam is too big for the eforce..
Some say vacuum leak still
Some say cam mau be a tooth off.

If there is no vacuum leak and the tuner(s) yes tuners lol can't figure it out is there some part that or wire problem a new TB helped it alot.

Would the car run so well if it was a tooth off and do what its doing at idle only?

It sounds more of a tuning issue. My car did that when I stepped up the cam and other goodies. There's only so much you can do with a handheld tuner. Once I got a Haltech, I was able to control the spark at every RPM and how much fuel was delivered. Most of it has been taken care of and the car runs much smoother.

Reelgrinder · 11-20-2014, 09:08 PM

I'm not sure what new tuner is using. The old tuner was using hp tuner software. I saw spark adjusted and he got it really good. We sat in car and went over idle tables able to get them good..

It seems that my car seems to have stumped 2 tuners I have seen others car they both worked on while waiting in line for dyno and driving around with the laptop and mine is the only one not idle correctly.

Bo White · 11-20-2014, 09:16 PM

Cam is too big to be a tooth off and not hit.

JMI · 11-21-2014, 05:24 AM

That cam in question is fairly easy to tune.Idles perfect at 750RPM in a m6 car.Is the injector data correct?

Reelgrinder · 11-21-2014, 06:11 AM

Quote:

Originally Posted by JMI

That cam in question is fairly easy to tune.Idles perfect at 750RPM in a m6 car.Is the injector data correct?

Yes, ID850s charts saw both put in myself..

Reelgrinder · 11-21-2014, 06:17 AM

saw that turning of clutch fuel shutoff could help.. but I doubt it in this case...

Chevy Fanatic · 11-21-2014, 08:01 AM

I had the same issue running on the MAF. Speed density tune took care of it.

Reelgrinder · 11-21-2014, 09:02 AM

Quote:

Originally Posted by Chevy Fanatic

I had the same issue running on the MAF. Speed density tune took care of it.

How please help me understand this? what is the logic to this and why would other tune have problems?

Unreal · 11-21-2014, 10:00 AM

That is all in the tune.

You can also try moving the maf, or log the maf and look and see what it is doing, and if it is a maf reverb/etc issue then SD tuning will help, but you shouldn't have that.

Chevy Fanatic · 11-21-2014, 10:01 AM

Quote:

Originally Posted by Reelgrinder

How please help me understand this? what is the logic to this and why would other tune have problems?

Google speed density. There is a ton of information out there that fully explains pros and cons and why it is sometimes needed.

Unreal · 11-21-2014, 10:08 AM

SD uses map/temp sensor for fueling, MAF used the maf. In some cases, the maf reading is all over the place at low RPM. This is why factory the cars run hybrid/SD <3500 or so, then when the maf signal is clean at 3500+ switch to maf only. A lot of tuners do Maf only because it is quick/easy to tune. SD tuning can clear stuff up like this, that being said, that cam isn't that big of a deal and should be fine.

K1SSRSS · 11-21-2014, 01:08 PM

Sounds like a tune issue, like others have said, if your cam was a tooth off it is likely your pistons would have smacked a valve already.

11-20-2014, 07:22 AM	#1
Reelgrinder Drives: 2016 SS Join Date: Oct 2014 Location: DFW Posts: 228	What if cam was installed 1 Tooth off advanced! Just wanted some ideas on what to look for if cam was installed a tooth off advanced. It runs great, makes really good power but has idle issues. Tried to look for vacuum leak by spraying around all intakes and TB. no changed to the idle used about 4 cans.. Start the car idles fine once you start moving and then come to a stop the idle will surge a few times and hang at about 11 -1200 rpm then falls to 900 where it supposed to be at. It will not surge again til car moves.. even if you rev the motor it will not surge. The surging is worse with clutch out coming to a stop vs clutch in. We turned the long term fuel off and it ran perfectly for about 30 min. The best it has ever has with no problems, then the CK light came on at a stop light and I saw the idle bump up for a sec.. and it did ok for about 5 miles, but, now when you press the gas the the motor chokes out and tries to die and it smells like its running to rich. I let cool down and it ran ok the next day with only a little hesitation when u press the gas but it was drivable to get to the tuner. It didn't try to die when you pressed the gas like the night before.. while your on the throttle or keeping the car at 2000 rpm above it runs perfect.. but let off or try and keep it at a constant rpm it kinda buckles abit and slight hesitation. The scanner just showed 02 to long to warm up. Some people say cam is too big for the eforce.. Some say vacuum leak still Some say cam mau be a tooth off. If there is no vacuum leak and the tuner(s) yes tuners lol can't figure it out is there some part that or wire problem a new TB helped it alot. Would the car run so well if it was a tooth off and do what its doing at idle only? __________________ 2016 SS with Eforce 2300 Borla Headers Borla Atak Last edited by Reelgrinder; 11-20-2014 at 07:55 AM.

11-20-2014, 09:08 PM	#4
Reelgrinder Drives: 2016 SS Join Date: Oct 2014 Location: DFW Posts: 228	I'm not sure what new tuner is using. The old tuner was using hp tuner software. I saw spark adjusted and he got it really good. We sat in car and went over idle tables able to get them good.. It seems that my car seems to have stumped 2 tuners I have seen others car they both worked on while waiting in line for dyno and driving around with the laptop and mine is the only one not idle correctly. __________________ 2016 SS with Eforce 2300 Borla Headers Borla Atak

11-20-2014, 09:16 PM	#5
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	Cam is too big to be a tooth off and not hit. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

11-21-2014, 06:17 AM	#8
Reelgrinder Drives: 2016 SS Join Date: Oct 2014 Location: DFW Posts: 228	saw that turning of clutch fuel shutoff could help.. but I doubt it in this case... __________________ 2016 SS with Eforce 2300 Borla Headers Borla Atak

11-21-2014, 08:01 AM	#9
Chevy Fanatic Drives: 2011 2SS/RS IOM/PEARL STRIPES-6M Join Date: Mar 2011 Location: DFW Posts: 151	I had the same issue running on the MAF. Speed density tune took care of it. __________________ Whipple S/C, 3.750 pulley, JRE rough idle blower cam kit, Trunion upgrade, C5R timing chain, LS2 chain dampner, Melling 10296, Dynatech 1 7/8 LT headers, OR pipes, Dual valve RX catch can, ID 850 Injectors, LPE Dual fuel pump, CAI with Apex scoop, VMax ported T/B, ADM Tune 675 RWHP 560 TQ

11-20-2014, 07:36 AM	#2
Brett V. Drives: 2012 camaro ss 2009 cts v Join Date: Oct 2014 Location: memphis Posts: 6	If it's a tooth off I suspect you would be having more issues than just at idle Sent from my iPhone using Tapatalk

11-21-2014, 05:24 AM	#6
JMI Drives: Red Jewel Camaro SS Join Date: Mar 2014 Location: East Coast Posts: 392	That cam in question is fairly easy to tune.Idles perfect at 750RPM in a m6 car.Is the injector data correct?

11-21-2014, 10:00 AM	#11
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	That is all in the tune. You can also try moving the maf, or log the maf and look and see what it is doing, and if it is a maf reverb/etc issue then SD tuning will help, but you shouldn't have that. __________________ Nick Corvette Z06 -1200ish rwhp

11-21-2014, 10:08 AM	#13
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	SD uses map/temp sensor for fueling, MAF used the maf. In some cases, the maf reading is all over the place at low RPM. This is why factory the cars run hybrid/SD <3500 or so, then when the maf signal is clean at 3500+ switch to maf only. A lot of tuners do Maf only because it is quick/easy to tune. SD tuning can clear stuff up like this, that being said, that cam isn't that big of a deal and should be fine. __________________ Nick Corvette Z06 -1200ish rwhp

11-21-2014, 01:08 PM	#14
K1SSRSS Chief Many Camaros Drives: A paid off Camaro!!! Join Date: Mar 2009 Location: Las Cruces, NM Posts: 1,863 View My Garage	Sounds like a tune issue, like others have said, if your cam was a tooth off it is likely your pistons would have smacked a valve already. __________________ 504hp/478tq Performance: Kooks LT, 3'' Exhaust, V-Max TB, Roto-Fab CAI, Custom Ported/Port Matched Heads and Intake Suspension: BMR Adjustable LCA's, BMR Trailing Arms, Poly Bushings, BMR Toe Rods Coming Soon (still in the box): Procharger F1R, G-Force Axles, 3:91 gears w/Eaton Truetrac