Kevspec Posted September 19, 2020 Share Posted September 19, 2020 We have converted fg to turbo using fg na ecu and everything is fine everywhere except cruise control. When activated mainly @80 and above the car hunts when it try's to maintain speed I can see the map values go for -10 to +2 when it hunts. Any help is appreciated Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted September 19, 2020 Share Posted September 19, 2020 The spark and torque tables are probably not correct for the NA + T which has different compression. Quote Link to comment Share on other sites More sharing options...
Kevspec Posted September 19, 2020 Author Share Posted September 19, 2020 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 Quote Link to comment Share on other sites More sharing options...
TravisR Posted September 19, 2020 Share Posted September 19, 2020 (edited) Kev, recently done an FG NA to turbo, cruise control works fine, I'll attach my map just so you have something to compare to. FG NA+T.tec Edited September 19, 2020 by TravisR Quote Link to comment Share on other sites More sharing options...
Kevspec Posted September 19, 2020 Author Share Posted September 19, 2020 30 minutes ago, TravisR said: Kev, recently done an FG NA to turbo, cruise control works fine, I'll attach my map just so you have something to compare to. FG NA+T.tec 991.61 kB · 0 downloads Thank you ill compare to what I have Quote Link to comment Share on other sites More sharing options...
Romulus Posted September 26, 2020 Share Posted September 26, 2020 Been having this issue as well, hunting during cruise, mainly over 100km/h. I fixed it by reverting back to the stock closed loop peak to peak amplitude settings, auF3245. The engine did not like the turbo settings. Quote Link to comment Share on other sites More sharing options...
Romulus Posted October 20, 2020 Share Posted October 20, 2020 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. Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted October 20, 2020 Share Posted October 20, 2020 Does your torque source change when this happens? Quote Link to comment Share on other sites More sharing options...
Romulus Posted October 20, 2020 Share Posted October 20, 2020 10 hours ago, Roland@pcmtec said: Does your torque source change when this happens? Will check, I don't think so actually. Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted October 21, 2020 Share Posted October 21, 2020 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. Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted October 21, 2020 Share Posted October 21, 2020 Disable closed loop fueling and see what happens. That would be interesting and tell a story if it fixed the problem. Quote Link to comment Share on other sites More sharing options...
Ghedina Posted June 19, 2022 Share Posted June 19, 2022 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. Quote Link to comment Share on other sites More sharing options...
Ghedina Posted June 21, 2022 Share Posted June 21, 2022 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 Quote Link to comment Share on other sites More sharing options...
05ENFORCER Posted June 22, 2022 Share Posted June 22, 2022 How did you go with this Brett? I have had the same for a while now, more like hunting is my problem. Cheers Craig Quote Link to comment Share on other sites More sharing options...
Ghedina Posted June 22, 2022 Share Posted June 22, 2022 Still working on it. Will let you know when i have it sorted. Quote Link to comment Share on other sites More sharing options...
05ENFORCER Posted June 22, 2022 Share Posted June 22, 2022 No probs, I'll get back into it also. Quote Link to comment Share on other sites More sharing options...
Romulus Posted June 22, 2022 Share Posted June 22, 2022 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? Quote Link to comment Share on other sites More sharing options...
Romulus Posted June 22, 2022 Share Posted June 22, 2022 On 10/20/2020 at 8:13 PM, Roland@pcmtec said: Does your torque source change when this happens? Nope. Torque source remains the same. It's the throttle that isn't operating gradually. Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted June 22, 2022 Share Posted June 22, 2022 This should sort you guys out. Quote Link to comment Share on other sites More sharing options...
Jase Posted August 28, 2023 Share Posted August 28, 2023 Hi all. I have the same problem with my FG NA + T. Did anyone find a solution?? Mine hunts sometime at idle in gear ( usually at the traffic lights) and sometimes with the cruise set around the 100km speed. Seems good on a flat road set at 100, but if going up a slight hill it will surge a few kms past the set speed then go a few kms below etc. Gets so annoying I usually turn cruise off. Any help would be much appreciated. Cheers Jason. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.