1227165 ecu with custom code much better than stock ecu. (Page 20/26)
Cajun APR 23, 09:47 PM
Chet,

My bad, guess I should be communicating with you to get this swap in progress!
chetw77cruiser APR 23, 10:38 PM
Other than the issue Fierosound has, the others that I have helped or worked on are running. Sound's issue is one I unwittingly caused when compiling the code for his project. Data is not of much use without the operating system to use said data. I have a new chip ready to send out for him. I am having issues with my swap, but this is ECU problems and has nothing to do with the NVRAM or the code. Some re-manufactured computers are not as "tested" as the originals were. I need to track down a cold solder joint somewhere.

If interested, PM me an I will help where I can.

Chet
ranger stone APR 24, 05:06 PM
Thank you ,thank you for bringing this up..I want to get input on which is best, chet77 or darth vader for the ECM modifications
& actual use
please post your actual experience with Idle , performance & MPG I got no answer from my first inquery
I am leaning towards chet77 but want the information from fiero forum users on their actual experience
with Darth fiero ECM modification also
chetw77cruiser APR 25, 09:25 PM

quote
Originally posted by ranger stone:

Thank you ,thank you for bringing this up..I want to get input on which is best, chet77 or darth vader for the ECM modifications
& actual use
please post your actual experience with Idle , performance & MPG I got no answer from my first inquery
I am leaning towards chet77 but want the information from fiero forum users on their actual experience
with Darth fiero ECM modification also



I have used both the 7730 and the 7165, although I used the $8D code in the 7730, not the $88 code that most are using. Overall both are fairly even performance wise between the two when tuned correctly. The 7730 is matched well to the 2.8 out of the box as it was used with the 2.8 in other applications. The 7165 has needed significant tuning to match the 2.8, but nothing a competent tuner couldn't do. I have my tune working great but need to tune the high load range a bit more, still running a bit rich. Fuel economy was evenly matched, but the 7165 with the correct settings was able to achieve over 40 MPG. The caveat though is that this was with air-fuel ratios upwards of 17:1. Such lean ratios are not the best for exhaust valve longevity. I currently achieve over 30 MPG with the 3.65 final four speed trans in my 86 SE.

A big point to consider is if you live in an area that requires emissions testing. The 7730 does have EGR control but the 7165 does not. There is a work around to get rudimentary EGR control but I have not tested this yet.

The 7165 wins for simplicity of installation. With just a few wire that need to be moved in the ecu connectors and a couple that are left out, the stock harness and ecu tray can be retained without any surgery.

If you are one that loves to tinker with the tune, the 7165 is fun and does not need any extra hardware other than a PC compatible computer and an aldl adapter. Do keep in mind that the NVRAM used in the 7165 does have a battery that will got flat after a while, so it is not a permanent installation. I always keep a memcal with the most recent good tune in the car in case of unforeseen issues. The 7730 can be tuned on the fly with the help of an emulator.

The 7165 is starting to bet a bit harder to find in the junk yards and on the net it can be a bit pricey. The 7730 can be found just about everywhere.

In summation, either is going to require some work to get going but can be a fun learning experience.


Chet W.

PS, I just returned from running my car on the replacement NVRAM I programmed for Fierosound. I had an extra 2-Bar map sensor so the comp would work correctly. A bit lean under higher loads due to the injectors not being what the code is set for, but it idled nice and smooth at 700 RPM and cruised fine.

ranger stone APR 26, 03:23 PM
Thank you , your setup may be over my skill level,,I have had someone helping me who is very knowledgeable about Fiero but
he is not up on the ECM modification,, Im not sure what a NVRAM is !
I will read again
Cajun APR 28, 10:54 PM
Chetw,

PM sent ......
fierosound MAY 07, 04:08 PM

quote
Originally posted by chetw77cruiser:

PS, I just returned from running my car on the replacement NVRAM I programmed for Fierosound. I had an extra 2-Bar map sensor so the comp would work correctly. A bit lean under higher loads due to the injectors not being what the code is set for, but it idled nice and smooth at 700 RPM and cruised fine.



Just got it and put in in. I think I've done something to disable by car !

Previously, it got gas no spark.

Now it fired up and ran rough for about half a minute at about 500rpm before dying - no response to throttle

I thought it might have been running on gas still in cylinders.
But it won't restart and I smell gas?? Maybe it flooded and died??

Tried connecting laptop with TunerPro RT on it - won't recognize the ECM.
Tried the WinFlash program to read BIN file and get timed out - no connection error.

I'm going to go recheck all the wiring AGAIN. I must have messed something up.
But if that checks out, I don't know what to do.

AND I'm stranded. Neither Fiero is driveable, and my daily driver Van is at the Dealership - ECM problems
I dropped it off this morning. It's 3:00pm and they haven't even got it in the service shop yet.

[This message has been edited by fierosound (edited 05-08-2014).]

fierosound MAY 07, 07:52 PM
Progress...

I found a wire in the wrong place. I figured that would be it (problem solved?)

Nope. Laptop still doesn't recognize ECM although Windows on laptop does and installs COM port.
So I'm trying to figure out this convoluted TunerPro RT OSE12 configuration (it looks right - just doesn't work).

With NVRAM I got today, engine starts, runs weakly, then dies.
Just can't keep it running. Throttle doesn't seem to give it more gas.

It seemed better with the original NVRAM, but runs rough, rich (have to throttle to keep it from stalling) and Check Engine light comes on.

Been chatting with Chet. With his help we'll get it figured out.

Scanned ECM for codes - get a 33 - MAP sensor high. THAT makes sense to how it's running.
So I have to follow that through and also consider that I may have damaged the ECM <damn>.

[This message has been edited by fierosound (edited 05-08-2014).]

fierosound MAY 11, 07:16 PM
I guess Chet's the only guy who knows anything about how this works... (can't find him)

I've re-checked all the wiring again with particular attention to the 3 MAP connections as per Chet's wiring diagram.
I've used an ohm-meter to verify that the connection at the MAP end is the same wire at the ECM end (and to the correct pin).
I've back-probed the connections at the MAP (key on/engine off) - 5.1-volts in 2.1-volts out (2BAR MAP at 3500 feet)
So there definitely doesn't seem to be anything wrong concerning the MAP.

Started it up, it floods, it stalls, it throws Error Code 33 (MAP high) again.

MAP input connects to C11 - a pin not normally used on the 7165.
So either the ECM is not seeing that signal, or the program is not accepting it, or the MAP flag is not set as a 2BAR MAP.

Looks like I bought a re-man'd 1227165 ECM ($175) that I didn't really need to.


I still can't get the laptop programs to talk to this damn thing to see what's going on.

Not sure who's ALDL cable I'm using. Got it years ago (2002?) from someone here. It uses a 1/8" jack/plug to connect with the ALDL port.
I'm positive the cable worked fine with WinALDL and both the 7170 and 6869 ECMs, but wanted to check its connections.
I can't find any info on it anywhere...

Info used to be here: http://www.fiero.nl/forum/Forum4/HTML/030414.html

[This message has been edited by fierosound (edited 05-11-2014).]

chetw77cruiser MAY 11, 08:23 PM
ALDL setup no good. Best I can figure is that the cable you have is strictly for 160 baud and can only receive. What you need is one that can communicate at 8192 baud. Tunerpro needed to be able to send a data request packet to the ecu for it to start spilling it digital guts.

Once we get the ecu communicating with tunerpro, we will be able to see what the ecu is doing and why it does not like us.

Moates has a usb-aldl cable as well as phonedawgz.