1994 TBI 350 Stretched Timing Chain

[megafan0258]

I have data logs!

Whats the best format for you all the view these?

I am seeing a lot timing fluctuation.

 

[megafan0258]

Please see the following google drive share links containing .xdl files:

Cold Start

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Drive After Closed Loop

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WOT While Parked

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[megafan0258]

@PlayingWithTBI

What do you think of these numbers?

They don't seem normal to me.

 

[termite]

Please see the following google drive share links containing .xdl files:

Cold Start

xc_hide_links_from_guests_guests_error_hide_media

Drive After Closed Loop

xc_hide_links_from_guests_guests_error_hide_media

WOT While Parked

xc_hide_links_from_guests_guests_error_hide_media

What ecm/service number is in your truck?

 

[megafan0258]

What ecm/service number is in your truck?

16197427

 

[n2xlr8n]

As for the transmission, yes it's a 4L60E.
It isn't slipping and I'm certain it's an engine related issue. I don't believe my trans would cause back firing through the TBI out of gear.

Gotcha.
You've done good work and received good advice from folks much smarter than I- I'm just trying to think outside the box.
I've seen electronically controlled trannies do really weird things...and not slip.

 

[megafan0258]

Gotcha.
You've done good work and received good advice from folks much smarter than I- I'm just trying to think outside the box.
I've seen electronically controlled trannies do really weird things...and not slip.

I greatly appreciate it, I've been battling this for over 2 years so anything helps at this point.

 

[megafan0258]

I'm going to take my inital timing back to 0 and redo my data logs. Something is not right with my timing advance and I don't think having it advanced 7 degrees is helping with diagnostics. I only did that so I can drive it to work and not die at stop lights.

I appreciate any help offered.

Thanks!

 

[megafan0258]

Does the battery need disconnected (to reset computer) after messing with the initial timing to reset timing curve? Or is that not a thing?

 

[PlayingWithTBI]

Does the battery need disconnected (to reset computer) after messing with the initial timing to reset timing curve? Or is that not a thing?

No but, you need to disconnect the battery to reset the EST fault you get from disconnecting the BLK/TAN wire.