Engine bogs under 2k rpm
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Engine bogs under 2k rpm So I have a 2006 sierra 1500 with an L33, tsp 212/218 cam, NNBS intake with the 36# injectors, x-link harness and GM 87mm throttle body. Since I put the intake on my engine would bog out and break up under 2,000 rpm. After that it runs great. But I've tried replacing my MAF sensor, air filter, fuel pump, spark plugs and wires and injector cleaner. I've run out of ideas and don't know what else to do. Hoping someone here would have suggestions. Thanks
Last edited by D_himmberger; Jan 22, 2021 at 01:21 PM.
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Scoggin Dickey explains the differences and why you can't use an adapter harness between the two sensors.
The GM 12580420 is the earlier TBSS with the old style MAP hold down.
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Which new MAP did you get and what part number is the TBSS intake? 2009+ use a different style of MAP than the 2008 and earlier intakes.
Scoggin Dickey explains the differences and why you can't use an adapter harness between the two sensors.
The GM 12580420 is the earlier TBSS with the old style MAP hold down.
https://www.youtube.com/watch?v=AwGiCFWSLhQ&t
Scoggin Dickey explains the differences and why you can't use an adapter harness between the two sensors.
The GM 12580420 is the earlier TBSS with the old style MAP hold down.
https://www.youtube.com/watch?v=AwGiCFWSLhQ&t
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I thought it was a tuning issue at first too, but I sent multiple data logs to my tuner and my truck ran great when I had the cam in. But my problem only started after I swapped my intake.
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And we're going to assume that all those logs were collected AFTER the intake swap ... ??
Changing the intake is highly likely to change the fueling requirements. Re-tuning tends to be required by doing such a thing. What changes to the tune have been made since the intake swap and the beginning of the problem?
Changing the intake is highly likely to change the fueling requirements. Re-tuning tends to be required by doing such a thing. What changes to the tune have been made since the intake swap and the beginning of the problem?
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Teching In
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And we're going to assume that all those logs were collected AFTER the intake swap ... ??
Changing the intake is highly likely to change the fueling requirements. Re-tuning tends to be required by doing such a thing. What changes to the tune have been made since the intake swap and the beginning of the problem?
Changing the intake is highly likely to change the fueling requirements. Re-tuning tends to be required by doing such a thing. What changes to the tune have been made since the intake swap and the beginning of the problem?
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If you didn't change injectors I don't see any reason to change the flow rate. For what it's worth when I swapped from the old truck intake to the TBSS and a Nick Williams 90mm... my truck ran perfect on the old tune. I did some data logging and applied some slight airflow adjustments in the tune. Did you use new intake gaskets? How about the intake bolts? I removed the rubber from the factory bolts. I would try unbolting the intake, lift and reset. Carefully re-torque to specs using the factory tightening pattern.
If your tuner is struggling to tune a cam that tiny, you really need to find another tuner. There are stock cams that are bigger than that. I swear, everyone that owns a laptop thinks they’re a “tuner” now.
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If you didn't change injectors I don't see any reason to change the flow rate. For what it's worth when I swapped from the old truck intake to the TBSS and a Nick Williams 90mm... my truck ran perfect on the old tune. I did some data logging and applied some slight airflow adjustments in the tune. Did you use new intake gaskets? How about the intake bolts? I removed the rubber from the factory bolts. I would try unbolting the intake, lift and reset. Carefully re-torque to specs using the factory tightening pattern.
