Need TBI tuning help-Tunerpro issue

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Grand_Wag_85
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Need TBI tuning help-Tunerpro issue

Post by Grand_Wag_85 »

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
82 J10
77 J10 Golden Eagle 401
88 GW

You know it's bad when your car is on the EPA's 10 most wanted list!

cmaje72
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Re: Need TBI tuning help-Tunerpro issue

Post by cmaje72 »

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.
79 Cherokee 5.3/4l65E/NP241C
79 CJ7
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babywag
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Re: Need TBI tuning help-Tunerpro issue

Post by babywag »

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?
-Tony
'88 GW (aka Babywag)
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az chip
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Re: Need TBI tuning help-Tunerpro issue

Post by az chip »

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?
'81 Cherokee Chief 81 WT Chief/MSD 6/Holley Sniper/ Rusty 4" Spring lift/ Bulltear oil adapter/K&P Engineering Oil Filter/ NP 208/ Serehill Light Harness/KC LED Headlights/ Evil Twin Fab Roof Rack and sliders/ Ross mirror mounts.
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Grand_Wag_85
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Re: Need TBI tuning help-Tunerpro issue

Post by Grand_Wag_85 »

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
82 J10
77 J10 Golden Eagle 401
88 GW

You know it's bad when your car is on the EPA's 10 most wanted list!

cmaje72
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Re: Need TBI tuning help-Tunerpro issue

Post by cmaje72 »

Hey one more question....This is on the J10? Is it still a 258?
79 Cherokee 5.3/4l65E/NP241C
79 CJ7
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Grand_Wag_85
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Re: Need TBI tuning help-Tunerpro issue

Post by Grand_Wag_85 »

The forum software is not letting me attach a BIN file.
82 J10
77 J10 Golden Eagle 401
88 GW

You know it's bad when your car is on the EPA's 10 most wanted list!
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Grand_Wag_85
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Re: Need TBI tuning help-Tunerpro issue

Post by Grand_Wag_85 »

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!
82 J10
77 J10 Golden Eagle 401
88 GW

You know it's bad when your car is on the EPA's 10 most wanted list!
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Grand_Wag_85
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Re: Need TBI tuning help-Tunerpro issue

Post by Grand_Wag_85 »

JEEP024V2.txt
Let's see if this works
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82 J10
77 J10 Golden Eagle 401
88 GW

You know it's bad when your car is on the EPA's 10 most wanted list!

cmaje72
Posts: 212
Joined: Thu Jul 07, 2011 6:33 am
Location: Western NY

Re: Need TBI tuning help-Tunerpro issue

Post by cmaje72 »

Ok I will take a look.....gotta get the really old tuning laptop out. I forgot you had an eagle!
79 Cherokee 5.3/4l65E/NP241C
79 CJ7
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Bill usn-1
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Re: Need TBI tuning help-Tunerpro issue

Post by Bill usn-1 »

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.
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