ChrisSTR

Car is stock NB1 with IHE, MTX-L. This is the DIYPNP MS2 with JasonC's alternator circuit and sequential injection module. built-in MAP, stock IAT, and diyautotune.com's startup msq. The MTX-L is grounded directly to the point near the throttle body, so it should have same ground as ecu(?)

There are two logs, a first start log where I started car and let it idle and get up to temp over ten minutes. The second logfile is where car was parked and I tested throttle application (some slow accel to moderate rpm, and some fast stabs at pedal.)

Currently reading forums and manual but would appreciate some feedback on logs to see if anything should be addressed.

*The car started on the second try. The first cold start there was a bit of stumble. Second start was perfect and I let the car idle and get up to temp. Warm starts are perfect.

*Jason C's alternator control circuit is working, voltage around 14.1-2.

*Idle was perfect, after car warmed up it stabilized around 900rpm. Tuner Studio thinks afr is around 15, gauge says around 14.

*Radiator fan started when car got up to around 175*. According to the cars temp needle, it idles slighty cooler than usual.

*The MTX-L gauge is reading about 1 lower than what the software is seeing.

*Reved engine up to 4K. This is working but when I stab at the throttle, there seems to be a lean tip-in that car quickly overcomes. Not sure it would work so well under load.

I want to address the lean tip-in and afr discrepancy before attempting to drive the car. Pretty happy with how its going so far.

Links:

Startup Logs & MSQ

ChrisSTR

Only other issue is loud humming from intake. I have read this is the idle control valve. . . any suggestions?

stoves

iTrader: (1)

I think you need to change the signal frequency being sent to the IAC. I don't remember exactly, but I swear I read a thread on this a few days ago.

ChrisSTR

Yeah, I read that too. Hesitate to change it because idle is so good.

The wideband issue was fixed in the afr calibration and entering a value of .028 for 7.35:1 afr.

The hesitation I'm seeing is just off idle. Looking into the accel enrichments to fix this. Then I will begin tuning.

So far happy with how its working. I have a dyno tune session next week.