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Cruise control issues


Kevspec
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2 hours ago, Roland@pcmtec said:

The spark and torque tables are probably not correct for the NA + T which has different compression.

It has all been tuned to suit all table etc are fine just cruise control is the only issue. Its like the throttle ratio to to maintain steady speed is to sensative

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  • 4 weeks later...

Update. Stock NA closed loop tables did not fix the problem. Its definitely a drive by wire or torque control issue, the throttle won't maintain gradual increases or decreases, its as if the throttle applies too much, then snaps back.

Not sure what the fix is at this point. I notice the engine will do it without cruise enabled, driving on a flat surface and steady throttle the throttle modulates without peddle input.

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Mine does a similar thing with cruise control on, but not all the time. I noticed that the afr was changing outside of the usual open/closed loop parameters so I wondered if it was going in and out of open/closed loop. The open loop tps transition/rpm (auF0523) might be a thing to check if it has been adjusted. I haven't checked to see if it is my issue but it's something to look at.

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  • 1 year later...

Hi all,
Was there ever a fix found for this issue?
I ask because my 2016 SZ-2 N/A Territory / Turbo conversion running a FG Turbo PCM &  ZF6HP26 is doing the same thing.
Any updates would be appreciated.
Cheers.

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A little more information on what my Territory / Turbo is doing.
The cruise hold speed perfectly on a flat road & controls the speed from increasing on declines, but if there is any incline the cruise wont increase / maintain the set speed.
Also if the set speed is raise from 90 - 100kmh, it struggles to accelerate the vehicle.
This seems worse the faster the vehicle is traveling...
Any advise would be welcome.
Cheers,
Brett  

HAEJ2A3 SZ2 Territory turbo - Current 21-6-22.tec

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A problem I never found a resolution for. The vehicle would overshoot then undershoot the set speed no matter what gradient the road. I wonder if it's an issue with the PCM calibration taking speed reading from the ABS module?

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