Help Please

[RyleeST]

Hi, I was hoping I could get some advice and opinions. Long story short...something is wrong with my FiST.

When I purchased the car last year, I put a Boomba 50/50 blow off valve spacer on the blow off valve. I left most of the holes on the spacer closed with only 2 or 3 open for the turbo hiss we all love. In January, I purchased the Cobb Accessport V3 and I installed the Cobb Stage 1 93 octane tune on the car. It's been great until this morning.

I was driving to work this morning and noticed the car felt sluggish. Normally, when I accelerate I can hear the turbo spool and I hear the 'pssshhhhh' when I let off the throttle. I couldn't hear that today. All I can hear is a weak little flutter that I don't usually hear and a very quiet 'psshhh'.

I'm worried. I'm going to check to make sure the harness didn't come unplugged from the BV but I can't think of how it would have done that so I'm stressing out.

Any help on what this could be or what to do to fix it would be appreciated a lot. Thanks.

 

[M0LTEN]

I would start with your Accessport. Use it to monitor a couple of things that could help you diagnose the problem. Like boost for example.

 

[The_Ryan]

sounds like limp mode. check to see if there are any codes.

 

[sonicmn]

Hi, I was hoping I could get some advice and opinions. Long story short...something is wrong with my FiST.

When I purchased the car last year, I put a Boomba 50/50 blow off valve spacer on the blow off valve. I left most of the holes on the spacer closed with only 2 or 3 open for the turbo hiss we all love. In January, I purchased the Cobb Accessport V3 and I installed the Cobb Stage 1 93 octane tune on the car. It's been great until this morning.

I was driving to work this morning and noticed the car felt sluggish. Normally, when I accelerate I can hear the turbo spool and I hear the 'pssshhhhh' when I let off the throttle. I couldn't hear that today. All I can hear is a weak little flutter that I don't usually hear and a very quiet 'psshhh'.

I'm worried. I'm going to check to make sure the harness didn't come unplugged from the BV but I can't think of how it would have done that so I'm stressing out.

Any help on what this could be or what to do to fix it would be appreciated a lot. Thanks.

Do you know about the on the fly map switching by using the cruise control buttons?

Another possible easy solution is you accidentally selected the low-boost economy map. instead of the standard map.

Its surprisingly easy to accidentally select, follow this to try changing back to the main stage 1 map.

https://cobbtuning.atlassian.net/wi...cus+ST+Focus+RS+Fiesta+ST+or+Ecoboost+Mustang

Good luck!!

 

[RyleeST]

Update: I was stressing it at work so I went out to the parking lot to see if I could check the BV harness situation. I couldn't get the right angle to see it. However, the car started up and seemed to run fine.

When I pulled into work and parked....revving it caused a weak turbo flutter and a quiet 'psshhh'.

When I went out to check on it a few minutes ago...revving it caused no turbo flutter and a loud 'pssshhh' like I'm used to hearing so it seems to be okay.

I still need to check that harness when I get home but I'm hoping you guys might have opinions on what could have happened or what could still be wrong. The real test will be my drive home, I'm not going to beat on her but I hope she seems to be running fine when if I do punch it a couple times to test.

 

[RyleeST]

Do you know about the on the fly map switching by using the cruise control buttons?

Another possible easy solution is you accidentally selected the low-boost economy map. instead of the standard map.

Its surprisingly easy to accidentally select, follow this to try changing back to the main stage 1 map.

https://cobbtuning.atlassian.net/wi...cus+ST+Focus+RS+Fiesta+ST+or+Ecoboost+Mustang

Good luck!!

Wait!! How does this work? I installed the accessport tune in January and then unplugged it. Does the cruise control map switching work without it plugged in? If so...this could be a possible cause of what happened.

 

[FiestaSTdude]

Wait!! How does this work? I installed the accessport tune in January and then unplugged it. Does the cruise control map switching work without it plugged in? If so...this could be a possible cause of what happened.

Yeah, the on the fly map switching is part of the tune, so it will work even when the Accessport is unplugged.

 

[RyleeST]

Yeah, the on the fly map switching is part of the tune, so it will work even when the Accessport is unplugged.

All I did when I had it plugged in was install the stage 1 93 octane tune and nothing else. I didn't set up the map switching stuff. Does it install that automatically when it loads the tune?

How do I replicate this to see if I just swapped the map on accident?

 

[sonicmn]

All I did when I had it plugged in was install the stage 1 93 octane tune and nothing else. I didn't set up the map switching stuff. Does it install that automatically when it loads the tune?

How do I replicate this to see if I just swapped the map on accident?

It is installed with the tune when you load it (even the OTS COBB tunes)

If you follow the link I provided above it will take you to Cobb's tech support site with the instructions on how to use the different options, you will have to scroll to find the fiesta buttons. but its in there.

 

[sonicmn]

All I did when I had it plugged in was install the stage 1 93 octane tune and nothing else. I didn't set up the map switching stuff. Does it install that automatically when it loads the tune?

How do I replicate this to see if I just swapped the map on accident?

Here is the link again if you cant find it above
https://cobbtuning.atlassian.net/wi...cus+ST+Focus+RS+Fiesta+ST+or+Ecoboost+Mustang

 

[RyleeST]

It is installed with the tune when you load it (even the OTS COBB tunes)

If you follow the link I provided above it will take you to Cobb's tech support site with the instructions on how to use the different options, you will have to scroll to find the fiesta buttons. but its in there.

I think this could be what happened. I was using cruise control on the highway this morning so I could have changed into the eco map on accident. I need to plug my accessport in this evening and learn how the map switching works.

Edit: it can change while driving, right? If it can't then this isn't my problem. If it can...this is likely what happened.

 

[sonicmn]

I think this could be what happened. I was using cruise control on the highway this morning so I could have changed into the eco map on accident. I need to plug my accessport in this evening and learn how the map switching works.

you don't need to have the accessport plugged in for this to work.

there is usually at least 2 sub maps (I think there are actually 3 but its been a couple years since i've had an AP and I forget what the 3rd one is) that show up when you load a tune, you loaded the stage 1 map, this map includes a economy mode that you can quickly flip to without having to flash the ECU, it just lowers peak boost from ~21PSI to ~5psi. It makes the car feel dog slow and makes it pretty easy to get max MPG's as less boost=less fuel. I believe the rest of the tune stays the same (not positive on this though)

 

[sonicmn]

I think this could be what happened. I was using cruise control on the highway this morning so I could have changed into the eco map on accident. I need to plug my accessport in this evening and learn how the map switching works.

Edit: it can change while driving, right? If it can't then this isn't my problem. If it can...this is likely what happened.

Yes you can change it while driving down the road, it accidentally happened to me a couple times when you accidentally press the +/- buttons without the cruise enabled, as long as you know its there its no big deal, just flip it back.

did you see your RPM point at 1, or 2 or 3 on the tach at some point for a couple seconds on your drive in?

 

[FiestaSTdude]

I think this could be what happened. I was using cruise control on the highway this morning so I could have changed into the eco map on accident. I need to plug my accessport in this evening and learn how the map switching works.

Edit: it can change while driving, right? If it can't then this isn't my problem. If it can...this is likely what happened.

From what I understand (I have an Accessport, but I've never used the fast map change feature lol) it can absolutely change while you're driving.

 

[RyleeST]

you don't need to have the accessport plugged in for this to work.

there is usually at least 2 sub maps (I think there are actually 3 but its been a couple years since i've had an AP and I forget what the 3rd one is) that show up when you load a tune, you loaded the stage 1 map, this map includes a economy mode that you can quickly flip to without having to flash the ECU, it just lowers peak boost from ~21PSI to ~5psi. It makes the car feel dog slow and makes it pretty easy to get max MPG's as less boost=less fuel. I believe the rest of the tune stays the same (not positive on this though)

I'll have to test this on my lunch break to try to replicate how it sounded when I pulled into work. I understand that the accessport doesn't need to be plugged in but I assume the accessport will display the maps im switching between while I'm testing the cruise control switches, right? I appreciate the help. My apologies for how much I'm posting. This car is my baby and I'm really stressed about what happened lol. Feeling better knowing it is MOST likely just the on the eco mode on the tune. Definitely need to test it later to make sure though.

 

[sonicmn]

I almost never left my AP plugged in, it usually sat in the glovebox, so I'm not sure if it displays changes on the AP when switching.

you can watch the tach, it will move to 1000 rpm, 2000 rpm, 3000 rpm ect. to indicate which map you have selected when you press the +/- cruise control buttons.

 

[RyleeST]

I just went out to my car to test it. I figured out the map switching with the tach. I only have the 2 installed it seems. 1 for eco, 2 for performance.

Revving the car...I could notice a difference in the amount of pressure blowing out the BV spacer. I could not replicate the turbo flutter I had this morning while revving it in the parking lot when I got to work. I'm hoping that was just a temporary result of me trying to push the car while it was in eco while I drove. I'll drive it on my lunch break later to make sure everything is okay but I'm nearly certain I just switched into the Cobb eco map on accident. Thank you guys for your help. I was stressing the fk out this morning

 

[FiSTY]

Is there a way to turn this "feature" off? First I'm hearing about it... but sounds terrifying. Read: I don't want on the fly changes running E30 (when inevitably hamfist those buttons).

 

[sonicmn]

Is there a way to turn this "feature" off? First I'm hearing about it... but sounds terrifying. Read: I don't want on the fly changes running E30 (when inevitably hamfist those buttons).

That's something your tuner should be able to do, I don't think its anything you can change without the Accesstuner software.

I think the tuner can make the interchangeable maps anything, I remember reading that they tend to shy away from putting multiple fuel types in the quick change options for this reasons, aka, it would be a real bummer to only have 87 in the tank and by mistake select the E30 tune.