Speed density run.

[nissmo]

Howdy Guys, got the 2.5' pulley and place it on the whipple ...did a run with the speed density tune and I notive knock and seems on the tables that the tahoe is Starving from Fuel, Header Glow orange at nite ..*Yikes*
I see 75% duty cycle on the 39lb injectors, and I notice that the A/F varies..
2 bar map Gives me a 172kpA max I think.
Any opinions? suggestions? Upgrade Injectors, timing??

Dont want to keep my mouth close and blow the engine, I Rather Ask :)

Gilbert

[5.7ute]

Howdy Guys, got the 2.5' pulley and place it on the whipple ...did a run with the speed density tune and I notive knock and seems on the tables that the tahoe is Starving from Fuel, Header Glow orange at nite ..*Yikes*
I see 75% duty cycle on the 39lb injectors, and I notice that the A/F varies..
2 bar map Gives me a 172kpA max I think.
Any opinions? suggestions? Upgrade Injectors, timing??

Dont want to keep my mouth close and blow the engine, I Rather Ask :)

Gilbert

First thing I would do is invest in a wideband o2 sensor & follow the autoVE procedure. This will help get your fuelling in line. Your boost VE table for starters is definately incorrect as it should increase with map, not be a flat table like yours.(unless you are using a step up regulator for fuel pressure.)
It might be a good idea to fully list your mods.
Cheers Mick

[joecar]

Gilbert,

Does just 1 or 2 primary pipes glow, or do all of them glow...?

[nissmo]

Gilbert,

Does just 1 or 2 primary pipes glow, or do all of them glow...?

Hey joe!

well Very First time that I notice that I was Running on the sand dunes and the compleate exhaust was orange, including cats and Flow master, last nite since I did a Couple of runs Only the Left side sitting on the Vehicle and part of the Y pipe.

Gilbert

[nissmo]

First thing I would do is invest in a wideband o2 sensor & follow the autoVE procedure. This will help get your fuelling in line. Your boost VE table for starters is definately incorrect as it should increase with map, not be a flat table like yours.(unless you are using a step up regulator for fuel pressure.)
It might be a good idea to fully list your mods.
Cheers Mick

I do Have a WB mods are 2 bar map, 39lb injectors, 411 ecm,walbro 255.

[5.7ute]

I do Have a WB mods are 2 bar map, 39lb injectors, 411 ecm,walbro 255.

No worries. Wideband data is not in your log so your actual AFR is just guesswork from the o2 sensor data.

[nissmo]

Hope I did it Right this time.

[joecar]

Hope I did it Right this time.Gilbert,

Both wideband AFR pids look flat...

Also, look at IAT... it is going off the scale... something might be wrong with it.

[nonnieselman]

Did yall see the codes it was throwing?

Diagnostic Trouble Codes
P0112 "Intake Air Temperature (IAT) Sensor Circuit Low" ($10) "Powertrain Control Module (PCM)"
P0341 "Camshaft Position (CMP) Sensor Performance Bank 1 Sensor A" ($10) "Powertrain Control Module (PCM)"
P0102 "Mass Air Flow (MAF) Sensor Circuit Low" PHC ($10) "Powertrain Control Module (PCM)"
P0112 "Intake Air Temperature (IAT) Sensor Circuit Low" PC ($10) "Powertrain Control Module (PCM)"
P0341 "Camshaft Position (CMP) Sensor Performance Bank 1 Sensor A" PC ($10) "Powertrain Control Module (PCM)"
P1112 "Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage" PH ($10) "Powertrain Control Module (PCM)"
P1665 "Engine Oil Pressure Output Circuit" PHC ($10) "Powertrain Control Module (PCM)"

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