What did you do to your Fiesta ST today ?

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I personally monitor IAT, BOOST, WGDC, timing correction cyl1, AFR, and OAR...

If you're going to load a tune I highly recommend an intercooler, and the mandatory mod is definitely a RMM.
using the OBD port or with gauges?
 


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Whaaat? So for us folks in Europe we only have obd
As far as I know, however with an OBD dongle and torquepro app you can monitor everything and more than what the access port is capable.. like I have one gauge that shows the heat soak from IAT at the filter to Intercooler and also tracks ambient
 


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As far as I know, however with an OBD dongle and torquepro app you can monitor everything and more than what the access port is capable.. like I have one gauge that shows the heat soak from IAT at the filter to Intercooler and also tracks ambient
Yeah I do have torque pro as well but I'm not able to see the afr
 


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Waste gate duty cycle, and yeah even in a stock tune it's good to track timing as negative corrections can be a sign of engine issues...
So I’ve been monitoring ignition corrections and WGDC and have been enjoying learning more about them. Thanks for sharing. I was wondering though, at WOT, should I be getting higher than mid 60’s% WGDC? I’m stock with the COBB OTS stage 1 91, drop in filter to be installed this Monday. Higher percentage=less open more boost as opposed to lower percentage=more open less boost right?
 


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So I’ve been monitoring ignition corrections and WGDC and have been enjoying learning more about them. Thanks for sharing. I was wondering though, at WOT, should I be getting higher than mid 60’s% WGDC? I’m stock with the COBB OTS stage 1 91, drop in filter to be installed this Monday. Higher percentage=less open more boost as opposed to lower percentage=more open less boost right?
Correct the higher the percentage the closer the gate is to being shut, resulting in more boost.. 60% isn't a sign of issue, our engines determine boost by the torque demand. If the engine is making sufficient power(cool air, good fuel) your boost request/WGDC will be less. What's your max boost been?
 


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Correct the higher the percentage the closer the gate is to being shut, resulting in more boost.. 60% isn't a sign of issue, our engines determine boost by the torque demand. If the engine is making sufficient power(cool air, good fuel) your boost request/WGDC will be less. What's your max boost been?
Just over 20psi. For some reason I thought it’d maybe be more by 2-3psi. I also noticed ignition correction went negative on all cylinders from just below zero to -2.34. Positive numbers were pretty much all close. I noticed they’d go negative when I was just leaning in to the throttle. Maybe 30% or so. I know that doesn’t mean much without considering knock count. How long does it take the ECU to learn and adapt to the new tune?
 


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Just over 20psi. For some reason I thought it’d maybe be more by 2-3psi. I also noticed ignition correction went negative on all cylinders from just below zero to -2.34. Positive numbers were pretty much all close. I noticed they’d go negative when I was just leaning in to the throttle. Maybe 30% or so. I know that doesn’t mean much without considering knock count. How long does it take the ECU to learn and adapt to the new tune?
What was your OAR? Cheap gas will cause those negative corrections same with higher IAT temps
 


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What was your OAR? Cheap gas will cause those negative corrections same with higher IAT temps
-1.00. I’ve seen 0.97 a couple times but 99% of the time it’s -1.00. It’s been cold here in SoCal lately but I haven’t checked intake temp.
 


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-1.00. I’ve seen 0.97 a couple times but 99% of the time it’s -1.00. It’s been cold here in SoCal lately but I haven’t checked intake temp.
I get the same shit with Cali gas, but I have dizzy stage 2 and Max boost is right around 25 for me. I've never seen the 27psi it claims but my WGDC is never above 82% but I'll get negative corrections that I think are related to the passenger mount/fuel, once temps rise I'm going to try adding in some 100octane see if that eases summer time knock corrections... That being said even though I have never hit max boost i feel it's just cause my engine is strong and meets the target parameters without it 🤷🏼‍♂️
 


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I get the same shit with Cali gas, but I have dizzy stage 2 and Max boost is right around 25 for me. I've never seen the 27psi it claims but my WGDC is never above 82% but I'll get negative corrections that I think are related to the passenger mount/fuel, once temps rise I'm going to try adding in some 100octane see if that eases summer time knock corrections... That being said even though I have never hit max boost i feel it's just cause my engine is strong and meets the target parameters without it 🤷🏼‍♂️
I’ve seen mentions of engine mounts causing false knock readings. Since it’s been cold mine definitely squeaks and creaks a lot more at parking lot speeds. Could be a factor, who knows. I’m still getting to know this thing but I do appreciate your time.
 


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IMG_20260220_085934_HDR.jpg

Welp, this is my lower PCM connector, snapped the lever while trying to rush during reassembly after torquing my mounts again.

This was two weeks ago, and shops and mobile mechanics tried to sell me sensors, throttle bodies... One look at the connectors and I fixed this with a ziptie.

Well, that's 800 bucks in diag fees and a new AGM battery down the drain.
 


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View attachment 69284

Welp, this is my lower PCM connector, snapped the lever while trying to rush during reassembly after torquing my mounts again.

This was two weeks ago, and shops and mobile mechanics tried to sell me sensors, throttle bodies... One look at the connectors and I fixed this with a ziptie.

Well, that's 800 bucks in diag fees and a new AGM battery down the drain.
Is times like these I really appreciate using the KISS method....

If you don't want to rely on a zip tie, this might do the trick
 


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Is times like these I really appreciate using the KISS method....

If you don't want to rely on a zip tie, this might do the trick
I'll get this ASAP. The zipties are holding good to get me to work and merge on the motorway but long term I'll want a proper repair. Don't want to be caught off guard by limp mode returning.
 




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