Quote:
Originally Posted by Teds89IROC
 The more I do to the car the better it sounds
So after more research I'm finding that the pre-90 camaros without the electric speedometer etc have a buffer box which takes the signal from the IAC to the ECM. The Dakota box basically bypasses this buffer box feeding the correct signal to the ECM. When I convert to an electric speedometer it will be read from this box. Changing just the Flag/Switch in TunerPro from Auto to manaul should bypass most of the issues, the only thing that might still remain is highway mode etc. which is just relative to gas mileage. Right now in 6th gear doing about 80 I'm at 1600 rpm's so how much gas mileage can I be losing  |
First off TPI cars didnt have a buffer box. Only TBI cars and firebirds with the electic speedo.
You need the SGI box to feed the ECM a VSS signal since you dont have a "working" mechanical speedo anymore. Since the VSS is on the back of the instrument cluster. I do beleieve that Jagsthatrun.com has a T56 tail section with a mechanical speedo cable hook up for it that will allow you the use of you stock setup. The only downfall to this is that tail section is about 300 dollars
Scooter BLM cell stuff is for 90-92 cars.
The reason why you need a manual bin is on how the ECM controls the IAC in a/dcell and idle. Start with the ARAP.bin (AYPY.bin is the same as the arap but for the auto.. I could be backwards as it has been a few years since I've mess with the 165 ecm).
Use the compare feature in tunerpro to see what changes were made to the chip that you had done at JS. (or swing by when I get back from Hawaii and I'll be more than happy to set ya up!) Do the injector constant, fan temps and the usual **** for what you have for your car.
Re do the min idle/TPS settings on the throttle body after you have the manual bin loaded. Rember auto cars can idle lower due to the greater rotational mass hanging off the back of the crank. I had that problem when I had my old 89 iroc.
The VSS does not directly control the IAC at all. CTS, TPS, LV8 and more so VSS controls it. It takes all of the inputs from the sensors to decide on what to do with the IAC. Weither you are in acell and it will be using the IAC for the throttle follower feature( when you let off the gas and the engine drops right back to the idle setting instead it slows the drop). etc...
VSS signal is constant. X amount of pluses per revolution of the DS. The faster the ECM is getting them, the faster you are going. Yes it is that friggin simple.
I think that about covers it.