1999 Camaro Idle Tuning Help
1999 Camaro Idle Tuning Help Hello All,
Pretty sure this is in the wrong forum but guys in here are always really helpful.
I've got a 1999 Camaro Turbo car I recently purchased which the tune is incomplete.
The transmission failed during dyno testing/tuning at which point the owner lost interest and then sold me the car.
Since then I've installed a new trans and fresh converter as well as correcting a few other small issues before moving onto tuning.
I've begun low speed idle tuning, tweaking the VE table, RAF and adding a touch of base timing and have made some headway, the car is running better but I've still got a couple issues I've been unable to remedy.
-Cold Start, the car will not start without help from the throttle, once fired after a few seconds it will idle but will not stay running without throttle.
I've adjusted the throttle so my TPS is within bounds and the IAC counts appear to be where they should be so I'm a little stuck.
-Hot Idle, the idle is a bit weak and will sometimes die when dropping into gear, it also will die sometimes when coming to a stop while driving so it seems like the idle just a bit off somewhere.
Lean Tip In, the other is a lean blip that occurs after slightly hitting the throttle when coasting off the throttle for a time, if staying in the gas it does just fine.
Injector data, map data all appear to be correct as well.
The combo info is as follows:
1999 Camaro SS Auto
Forged 5.7 LS1, CNC Ported 243 Heads, Brute Speed FI Cam, Victor Jr. intake, Alum. Elbow, Holley 105mm TB, B/W S484 Turbo, Fender exit exhaust
FIC 1000cc Injectors, BRFPR w/ AM rails, Twin 255 Pumps, 92 Pump Fuel, A2W I/C, 43 psi fuel pressure-spec for injectors.
TH400 Trans, Circle D Converter
I've attached the tune that seems to run the best along with the corresponding cold start and low speed driving scans.
The heavy lean spots on start up are the wideband counting down so I'm thinking I may need to start scanning after the wideband is reading.
Thanks in advance for the help guys.
Pretty sure this is in the wrong forum but guys in here are always really helpful.
I've got a 1999 Camaro Turbo car I recently purchased which the tune is incomplete.
The transmission failed during dyno testing/tuning at which point the owner lost interest and then sold me the car.
Since then I've installed a new trans and fresh converter as well as correcting a few other small issues before moving onto tuning.
I've begun low speed idle tuning, tweaking the VE table, RAF and adding a touch of base timing and have made some headway, the car is running better but I've still got a couple issues I've been unable to remedy.
-Cold Start, the car will not start without help from the throttle, once fired after a few seconds it will idle but will not stay running without throttle.
I've adjusted the throttle so my TPS is within bounds and the IAC counts appear to be where they should be so I'm a little stuck.
-Hot Idle, the idle is a bit weak and will sometimes die when dropping into gear, it also will die sometimes when coming to a stop while driving so it seems like the idle just a bit off somewhere.
Lean Tip In, the other is a lean blip that occurs after slightly hitting the throttle when coasting off the throttle for a time, if staying in the gas it does just fine.
Injector data, map data all appear to be correct as well.
The combo info is as follows:
1999 Camaro SS Auto
Forged 5.7 LS1, CNC Ported 243 Heads, Brute Speed FI Cam, Victor Jr. intake, Alum. Elbow, Holley 105mm TB, B/W S484 Turbo, Fender exit exhaust
FIC 1000cc Injectors, BRFPR w/ AM rails, Twin 255 Pumps, 92 Pump Fuel, A2W I/C, 43 psi fuel pressure-spec for injectors.
TH400 Trans, Circle D Converter
I've attached the tune that seems to run the best along with the corresponding cold start and low speed driving scans.
The heavy lean spots on start up are the wideband counting down so I'm thinking I may need to start scanning after the wideband is reading.
Thanks in advance for the help guys.
