Thread: May try my hand at tuning Need serious help

Looking around it seems like just buying a Tuner and tuning it myself may be more effective than taking it to the shop.
I know 0 about tuning/tuners etc. Im going to be running an intense stg 2 cam, 3.0 pulley, zzp intercooler 2.25" w/ FMHE, 42.5 injectors, new 2.5" cat back exhaust, cold air intake, ported and polished heads with 5 angle valve job 110# springs. Machined gen 3 LIM, Northstar TB from 99 deville, If I forgot anything its pretty minor I guess.

Im trying to find out what I need to do once I buy a DHP, are there specific programs inside the pcm? A GUI? I dont even knoa what to look for.

Also with the right tune what kind of power should I expect

Maf sensor and injectors are the biggest parts of tuning.. the rest of the mods do not change your tune at all actually.

Basically aside from some trans tweaks and a few tweaks to timing the only areas you need to worry about is finding the rigbt maf table for your maf and installing it into the file and changing your injector constant. Fine tuning is typically not needed and most people go backwards after they put a good base tune on.

With that cam I will also suggest running open loop as it will make tuning and driving it much much easier and consistent.

I hate tl say it but I dont really know what open loop is or maf tables

How would I tune the car for the injectors?

Badically open loop is when the car is cold. The computer runs the car in open loop just by what it knows everything should be at to run correctly.
Closed loop is when the computer starts adjusting things based on what it is told from the sensors. Like the car adjusts fuel trims based on the rear 02 sensor readings when in closed loop and uses the upstream bank in open loop

This is how I understand it anyways

Makes sense. Thanks.

There are very few things you need to know to do a 'full tune' on a car, so dont be afraid of it.

The learning is basically knowing what not to screw with.

Originally Posted by Uno99

A basic 1.0 type tune is not difficult but for cam and injectors for someone who has no experience it not an easy task. Maybe im just slow but it was a PITA and Im still learning.

its real easy. There no reason to do any fancy tuning for a cam.

Terrible gas mileage? Hard starts? Surging? Those are not symptoms of a bad tune but a symptom of a bad setup.

There are plenty of ways to make tuning short and easy work. The fact that a 3800 uses only a maf makes tuning a matter of preference and not necessity... you are not changing the anything related to the "tune" when you ad a cam... or a turbo.. or a csc or a bigger blower ...

It is funny that you say that I am wrong and you are right but you cant even give an example why that is.

Nah I read everythimg I just dont know what is going on!!!