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I need help tuning my TBI set up. 7747 ecm and using Tunerpro. Trying to set the idle speed but I can't figure it out in Tunerpro. There seems to be no setting relevant to idle speed vs coolant temp.

I set the ignition timing by the book to 15*BTDC and unplugged the distributor wire first.

I then jumpered the ALDL, unplugged the IAC, fired it up and set idle to 600 and verified .054V at the TPS.

After that I reconnected the distributor and the IAC and the idle speed of the car is over 1000RPM. I have the BIN reflecting the proper Initial SA.

Thanks

Is this a junkyard TBI setup or howell or some other? Does the computer control spark? Its been a while since I have messed with TBI setups but if you can get me your bin I can take a look.

Did you change the timing table to account for the 15* initial timing?

With everything hooked up how much timing @ idle?
With a timing light...and what does tunerpro data show for timing?
Can you upload a datalog?

Grand_Wag_85 wrote:I need help tuning my TBI set up. 7747 ecm and using Tunerpro. Trying to set the idle speed but I can't figure it out in Tunerpro. There seems to be no setting relevant to idle speed vs coolant temp.

I set the ignition timing by the book to 15*BTDC and unplugged the distributor wire first.

I then jumpered the ALDL, unplugged the IAC, fired it up and set idle to 600 and verified .054V at the TPS.

After that I reconnected the distributor and the IAC and the idle speed of the car is over 1000RPM. I have the BIN reflecting the proper Initial SA.

Thanks

With vacuum on or off the distributor?

No VAC at the distributor. With spark control. This was a kit from "Performance Fuel Injection"

Timing set in Tunerpro. I will try and get a BIN and log

Hey one more question....This is on the J10? Is it still a 258?

The forum software is not letting me attach a BIN file.

cmaje72 wrote:Hey one more question....This is on the J10? Is it still a 258?

This is on the Eagle.

The TBI on the J10 worked pretty good until the 258 valve cover claimed another victim...Blew the engine last June. The J10 is receiving a 4.0/NV3550 from a 2003 TJ. Also FINALLY found those seats I've been hunting for!

Let's see if this works

Ok I will take a look.....gotta get the really old tuning laptop out. I forgot you had an eagle!

There's quite a bit changed and some that should be but isn't.
I recommend you click the link and scroll down towards the bottom till you get to the "Tuning and Programming Chips" section of the FAQ's.
http://www.binderplanet.com/forums/inde ... ere.47254/

The key to tuning is the KISS principle.
Do not make changes to things your not sure how they impact the rest of the tune.
Start with a clean bin like the ASDU and then follow the tuning guide.