Yeah, Idle is set by screw, and by setting tps sensor voltage at idle, If I don't, engine stalls. It makes spark advance changes at idle, it usually moves between 14-16 degrees at idle, except when...

Sorry guys. I did not follow instructions and post here first. Honest mistake, I was too involved in looking for tech answers to read about what I should do first.

Whew now that the apology is...

Here is playback of data taken while fuel pressure is down around 23-25psi. BLM stays at 102......:mad1:


http://youtu.be/Ko4IPDXvOYA

here is idling in gear, shifted back to park, and then stalling


http://youtu.be/Af2Fi07bSjo

Kicked an IGN malfunction code, IAC code and Map sensor voltage low code.
Swapped in old IGN module, and checked White EST wire for shorts to ground, or shorts to another wire, and it checks out...

IAC is at zero b/c I set idle speed with IAC off, ECU is requesting idle at 720 rpms, but I have it at 1000 to keep from stalling. Im thinking I need to reset idle speed with Iac counts at 20?
...

Finally some data. Borrowed a scanner, and got this data. Couldn't get it to save on usb drive to upload file directly, still no luck with tunerpro.

I recorded the playback of the truck at idle....

Video 4
http://youtu.be/mBfWXK_EgVM

Here is an update with data from back probing the sensors:
Checked Map Sensor wiring, we have 5V accross two outside terminals with Key On
we have 4.9 volts on Map sensor signal wire with key on...

I'm too rich not only at idle, but throughout rpm range. My experience with working several different engines both on and off the dyno tells me this. The numbers I am getting are backing up my...

No change, still no data stream

Reset idle to 850, and re adjusted tps so it's back at .58v at idle all with iac closed.

Reset iac by running engine for 5 secs, off for 10 and then back on. Truck will hardly even stay running...

6534

This is how the serial cable is wired. Instead the wire that goes to Pin E needs to go to pin M ?> Can E and M be wired together or do i need to use the two transistor method below?

6535

Gotya, pulled it open again on the serial cable, pulling ALDL data from pin E. Pretty sure that is one problem, I need to be getting data from pin M, with the 8192 baud, newer ECM?

Can pin M...

For two reason I know the IAC was closed completely. 1) I shorted the ALDL pins to put computer to check for DTCs, and turned key on. In theory, this extended the IAC to fully closed. I build a...

So been trying to fool this thing all day with no notable progress.

I warmed up engine to operating temp and made sure tstat was open at 200 degrees. I revved and held engine at 2k RPM to ensure...

With base timing at 4 degrees instead of the 12 degrees before, the truck runs moderately better through the rpm range and varying loads.

however, the terrible idle quality is worse than before,...

The Check Engine Light operates as follows

Key off position: obviously light off
Key run position: light flashes once and then remains on
key start, then to run: light remains on, until engine...

So I received new, not homebuilt aldl to usb cable, with driver software and installed everything. Cable and driver are installed as com5. After searching, I discovered the thread about that driver...

What I'm doing, according to the tutorial:

Here's what your need to download, read through then below more instructions how to put them in TunerPro.

First your bin/chip/ASDU.bin

Then you...

I lost the paper i had written the injector #'s on, but i had previously looked up the color and verified the # to be the 94-95 7.4, lower flow rated, but higher pressure ones.

Every time I go...

We set timing with the EST disconnected (Tan wire) initially at 4 degrees, and then disconnected battery per howell instructions. To get the truck driveable we set timing at 6,8,10, then 12 degrees...

Yes, I'm a newbie, been trolling on here for a while, just now registered. Searched for countless hours using forums and google, and I'm exhausted after trying to fix this truck.

Here is the...