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You can read and log your o2 trough your laptop as a serial channel. So your o2 needs to be hooked to your laptop via usb. Then go and find it on the hpt channels and log it. Go on the external...

Check that temp sensor, iirc there was a change on the clt temp sensors around that year due to people rushing to dealers because their car was running hot, when it was the normal operaing...

What type of fuel system are you running? I ask because hotter fuel will be less dense ie less fuel per pulse is goint to be delivered. I had ran into similar issues tunning megasquirt. One car was...

Did you enter the new data for the new injectors?
Post your tune.

Change the vss output small numbers faster larger numbers slower.

I'm goin to jump on this while i'm at it.
Why would my traction control activate after changing the tire size to correct the...

Bringing this back from the death. Will this procedure appeace my traction control. The vehicle is an 01 tahoe stock. It has 24" wheels and i tried to correct the speedo using the hpt calculator for...

I would go ahead and remove the alternator and get it tested, but be carefull with the testing. I had an 02 duramax that the alternator was showing weird readings, like sometimes it wouldn't charge...

If you have no cats, you have to delete the rear o2's and related codes.

Well, i'll answer my own question. Yes that is how it works, except for the virgin sacrifices and complicated formulas. Just plugged it in and hpt reads my wideband from the computer.

This forum...

Ok here i go. I have been doing a lot of reading, but i'm a bit confused about serial wideband datalogging. Please correct me if i'm wrong or if i'm missing something.
I'm using mpvi 2 and i am...

To me it seems that your catback had a lot of back pressure. Hetting rid of it the turbo is performing better. If you are already running off the spring then you migh have to go to a lighter spring....

That looks like its normal. The torque management is doing its thing. As for the servo, you can take it out and look at it without pulling the pan.

I used the wizard. I tried changing the tire size and making it one inch smaller and the problem seemed to move up to around 40 mph. So far i've left it at that, since it makes a good anty theft...

Electric fans will do this too if you are not using a relay and they are running at all tines on acc. A diode will take care of it. Some fans will produce voltage while they are spinning and it...

Can anyone take a look at my log and explain me what is happenning. This is a stock lm7 with a 60e. the only change that i made to this tune was to update the tire size from stock to 24's. the truck...

Definetly agree on reading on other systems. If you read the megasquirt manual you will see the light. It is not adjust x to obtain y, but it will explain you the math behind it. Just have to...

If its a high mile engine, you migh be picking up piston slap or even lifters. Had a 5.3 do this because a lose flexplate bolt.

I hate to be that guy, but for the amount of effort money and time you are going to invest in this turbo system, you'd be way ahead by swapping in an 5.3 or 6.0. Af far as turbo size a good o'l to4e...

Tried again today after pulling more fuses and same thing. Weird thing i noticed is that the scanner and the editor show the correct vin number. It only shows that on the report. I also noticed that...

Want to trade issues? On mine i can't read the pcm, but i can read the tcm just fine. I'm about to put the computer in the microwave. The only reason why i got hp is the duramax, but it it doesn't...

Tried turning the abuse mode and torque management off and still same issue. Truck will run just fine with the traction control off, but once it's on the no traction light will turn on and put me on...

So, like the tittle states, i am unable to read the ECM on my 02 lb7 Duramax. I can read the TCM just fine and with the viewer i can view the ecm and send commands to MIL, ac clutch etc and all...

I'm going to put the stock tune back in and do the tire change to that one. I thing i applied changes to an erroneus tire size 32.4" per manufacturer and wizard but it phisically measured 31.5.
How...

So the offender is an 01 tahoe lm7 5.3 stock. I downloaded the stock file and used the tire size wizard to change my tire size. The truck has 24's which according to the calculator and some interweb...

As the tittle states i have been having issues connecting my mpvi2 to my 02 duramax ecm. I can connect just fine with the scanner and i'm able to send commands to the vhicle successfully. I can read...