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A longer log might help diag. I recommend 15 min

That's what I said... traditionally yes.. but on gen 4 it might not. I've had more than 2 now act like vats issues and it is where the cam sensor wiring was off. No cam codes. It will fire and...

The problem is PIN A B C are swapped around in that jumper harness that a lot of GEN 4's come with. The pinout to that connector could be correct..but is it changing or should it change though that...

be sure to delete the orignal map sensor pid when you do this.. Only have 1 in your list.

There is a table, O2 readiness vs ECT. set it to something high to keep it in OL. The closed loop vs ECT or IAT doesn't work on all OS's.

There are ways to get a OL idle doing some PE...

I'd pick as many components as possible from some OE application. The pedal and throttle body are important to pick from some OEM application together.

If your set on a E38 but need it for a...

because to the misfire diagnostics.. cam lope looks like a misfire.

Try this.. Somethings don't like to be set to exactly 0.

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See this link for more info

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I've run into this a couple times on GEN 4 swaps.

traditionally a engine will run without a cam sensor. They just might not start every time.. but every other time they will start.

A GEN 4...

It's a good idea to start from scratch IMHO.

If the shifts change going from MAF to SD than one of those airflow models are not correct.

This looks like it should work.

I'd put the MAP enable to something higher like high 80's or 90 kPa. If you do get into PE 65 kPa would be way to low.

Lets see a log. Its easy to tell when...

It can be several things. Without looking at the tune and maybe a log we would just be guessing.

it would be as useful as a brick at that point.

On the LTFT question I would disable them. I would try to keep STFT active but your cam size is at a line where the fuel trims will drive it into bad fueling. There is a point that overlap is just...

LTFT's can "stick" positive and run the WOT fueling rich. STFT's or LTFT's are not updated during PE, and you should be in PE at 100kPa or slightly less than that. So if the engine has been...

It's a known issue these don't read accel pedal position correctly in 03-04ish trucks.

Unless its throwing some sort of pedal code I wouldn't worry about it.

blower displacement isn't everything.

M90's are like what was used on those old supercharged thunderbirds and 3800 GM motors.


When I was a kit I took a stock LT1 intake, cut the top off,...

IF you search by my name I have an excel sheet posted in here to figure this out for you.

IMHO never safe to overwrite a different OS in a GEN 4 unless its a custom OS from hptuners for the original OS.

About once every two weeks we see someone bricking something trying to do this.

It looks like other people have found issues that would cause a legitimate SES light.

In the case of the SES light being on (sometimes dimly) in a swap car.. its because a LED needs such a small...

be certain that it is correct.. Like I said before.. A fresh build could check good and come back after 20 miles and show low. They have to work out airpockets in the cooler ETC.

Did you use GM parts? I've had to replace PCM's for this.

The knock sensors need to be torqued correctly too.

I smoothed out the VVE a little for you.


The timing tables could use a lot of help. Even going back to a stock timing table should offer improvement. Its very low in timing.
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