fabbing an intake

[drasko]

thinkin about makin my own intake for my 05. i have some 4" exhaust pipe and a big K&N cylinder fender. made a test run today and put my sensor on the 4" pipe. my mileage went crazy when i drove it.....

anyone have any suggestions?

do the kits like AFE utilize the sensor?

what have you guys done?

 

[AMassaro]

I don't know if I'd use exhaust pipe on the intake. It'll rust unless it's stainless. Most people use aluminum tubing. Can't help you with the other problem.

 

[drasko]

its aluminum exhast tubin for a tractor... my little present from kenworth

 

[drasko]

do the intake systems available utilize the factory sensor???

 

[bpenrod]

My Airaid does. I also switched to an AFE Torque Tube since the Airaid modular intake tube was rubbing on the boost hose.

 

[ThomasLawrence]

All intake systems provide a location for the stock IAT/P sensor. It's a required sensor, and the ECM won't be very happy without it. Use small piece of flat stock and some small (1/2"? 5/8"? Measure the sensor's diameter) tubing, and make a pedestal for the sensor. Then drill a matching hole in the intake tube, and TiG it on. Drill/tap for the sensor mounting screws, and you're all set.



-Tom

 

[nickleinonen]

when i first ran my bhaf, i left the sensor out of the system, but still plugged into the harness... i now have it in the system... it makes no difference at all in the feel of how the engine drives/respondes...

 

[ThomasLawrence]

it makes no difference at all in the feel of how the engine drives/respondes...

Right... Cummins just stuck it there for a goof



You may not feel a difference, but it's part of the fuel injection system... by reading the temperature and pressure of the incoming air, and combining that with the MAP sensor reading, the ECM can guesstimate the amount of oxygen present in the air charge, and determine how much fuel it can deliver (without violating any EPA regs)



By leaving the sensor flapping in the (hot) breeze, you're actually losing a bit of HP (not much, and not enough to feel, but a dyno would see it).



And, of course, if you leave it unplugged altogether, you're going to set a DTC.



-Tom

 

[nickleinonen]

And, of course, if you leave it unplugged altogether, you're going to set a DTC.

and when the sensor fails, you get drivibility issues... a nasty stumble at 1900-2000 rpm and heavy defueling after that... had that happen [p0107 - Manifold Absolute Pressure/Barometric Pressure Circuit Low Input]... all better now