2013 Camero LS3 Speed Limiting Problem
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2013 Camero LS3 Speed Limiting Problem
I have had a problem with my 2013 Camero when running into upper RPM range while accelerating in 2nd 3rd and 4th gear it is shutting down electronically at 4900 RPM.
I have checked all grounds, all wire harnesses, replaced all rpm sensors known to man, changed to new ECM and flashed at GM Dealer. When Placed on Dyno or on the road
it constantly shuts down when it reaches 4900 RPM. Tried to turn off all control safety features in ECM and engine still falls on its face at 4900 RPM. I have 2 friends that are top engine builders/Tuners in St. Louis Missouri who have never been stumped by such a problem and we are at a loss for what to look at next. Any Ideas out there?
The engine was built just 2 years ago and the car only has 30K miles on it. It has been well cared for and looks like new under the hood.
Here is what I have in the engine:
Roto Fab Cold Air Intake, Melling 10% over High Performance Oil Pump
Competition Cams special grind HP Camshaft, Comp Evolution Link Bar Lifters, Comp Rocker Trunnion Kit, .700 lift valve springs
Frankenstein Monster Heads, Heads were milled .044, CC of heads are 68cc, Cometic .040 Head Gaskets, ARP Head Bolts
Stainless intake, Kooks 1 7/8 Tubular Headers with Green Cats and Dual H Pipe Stainless exhaust
McLeod RXT Twin Disc 1000HP Ceramic Clutch Kit with 8-Bolt Aluminum Flywheel; 26-Spline
Willing to listen and try anything at this point.
Thanks in advance for any advice!
DBL REV
I have checked all grounds, all wire harnesses, replaced all rpm sensors known to man, changed to new ECM and flashed at GM Dealer. When Placed on Dyno or on the road
it constantly shuts down when it reaches 4900 RPM. Tried to turn off all control safety features in ECM and engine still falls on its face at 4900 RPM. I have 2 friends that are top engine builders/Tuners in St. Louis Missouri who have never been stumped by such a problem and we are at a loss for what to look at next. Any Ideas out there?
The engine was built just 2 years ago and the car only has 30K miles on it. It has been well cared for and looks like new under the hood.
Here is what I have in the engine:
Roto Fab Cold Air Intake, Melling 10% over High Performance Oil Pump
Competition Cams special grind HP Camshaft, Comp Evolution Link Bar Lifters, Comp Rocker Trunnion Kit, .700 lift valve springs
Frankenstein Monster Heads, Heads were milled .044, CC of heads are 68cc, Cometic .040 Head Gaskets, ARP Head Bolts
Stainless intake, Kooks 1 7/8 Tubular Headers with Green Cats and Dual H Pipe Stainless exhaust
McLeod RXT Twin Disc 1000HP Ceramic Clutch Kit with 8-Bolt Aluminum Flywheel; 26-Spline
Willing to listen and try anything at this point.
Thanks in advance for any advice!
DBL REV
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True Car Nut
Joined: Feb 2015
Posts: 6,849
Likes: 1,014
From: Earth
Wait, is it:
. . . or does it:
. . . ?
1st revs to infinity just fine?
Also,
Factory programmed ECM on this non-factory engine?
Is the check engine light on?
Are there any codes stored?
. . . or does it:
. . . ?
1st revs to infinity just fine?
Also,
Here is what I have in the engine:
Roto Fab Cold Air Intake, Melling 10% over High Performance Oil Pump
Competition Cams special grind HP Camshaft, Comp Evolution Link Bar Lifters, Comp Rocker Trunnion Kit, .700 lift valve springs
Frankenstein Monster Heads, Heads were milled .044, CC of heads are 68cc, Cometic .040 Head Gaskets, ARP Head Bolts
Stainless intake, Kooks 1 7/8 Tubular Headers with Green Cats and Dual H Pipe Stainless exhaust
McLeod RXT Twin Disc 1000HP Ceramic Clutch Kit with 8-Bolt Aluminum Flywheel; 26-Spline
Roto Fab Cold Air Intake, Melling 10% over High Performance Oil Pump
Competition Cams special grind HP Camshaft, Comp Evolution Link Bar Lifters, Comp Rocker Trunnion Kit, .700 lift valve springs
Frankenstein Monster Heads, Heads were milled .044, CC of heads are 68cc, Cometic .040 Head Gaskets, ARP Head Bolts
Stainless intake, Kooks 1 7/8 Tubular Headers with Green Cats and Dual H Pipe Stainless exhaust
McLeod RXT Twin Disc 1000HP Ceramic Clutch Kit with 8-Bolt Aluminum Flywheel; 26-Spline
Is the check engine light on?
Are there any codes stored?
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