beceen
Member
- Thread starter
- #1
Hi all, I hope you can help troubleshoot this one. I have 2015 Ecoboost with automatic trans with a pretty low 54000 km on the odo, and 2 weeks ago it started behaving like on the video (I posted in on the Mustang reddit sub):
Basically, only on warm engine it doesn't keep stable RPMs on idle, especially when in stop and go traffic or on the traffic lights. It doesnt shut off, but shudders and the battery voltage also drops/jumps (from 14,4 o 12 or even 11V and then back to normal around 14). I went to Ford service, and car doesn't throw any codes and generally feels normal (acceleration, overall driving).
From what I found online, I decided to change the fuel pressure sensor (BU5Z 9F982 B) that some say may also be reason for the dreaded ecobooms (I think it was changed under warranty in the US but there was no service action in the EU, which is where I'm from). It seemed to fix the rough rpm, but the problem came back yeasterday. The RPMs kind of stabilize on Park, and you can see, they wave when on R or D.
Some users suggested that maybe something takes more energy from my batter - I put the battery on CTEK conditioner/charger for 12+ hours; it seemed to help for some time, but the problem keeps coming back.
My battery is from March 2020, and I have few problems with it running out (like battery would deplete just after 2 weeks of the car sitting in garage; I don't drive much).
Sparkplugs have been changed last year when the car had 48kkm on the odo, in August I had the annual service (oil, filters), I make around 3000-4000 km a year.
Generally the car was trouble-free up to now.
Any ideas? thanks!
Basically, only on warm engine it doesn't keep stable RPMs on idle, especially when in stop and go traffic or on the traffic lights. It doesnt shut off, but shudders and the battery voltage also drops/jumps (from 14,4 o 12 or even 11V and then back to normal around 14). I went to Ford service, and car doesn't throw any codes and generally feels normal (acceleration, overall driving).
From what I found online, I decided to change the fuel pressure sensor (BU5Z 9F982 B) that some say may also be reason for the dreaded ecobooms (I think it was changed under warranty in the US but there was no service action in the EU, which is where I'm from). It seemed to fix the rough rpm, but the problem came back yeasterday. The RPMs kind of stabilize on Park, and you can see, they wave when on R or D.
Some users suggested that maybe something takes more energy from my batter - I put the battery on CTEK conditioner/charger for 12+ hours; it seemed to help for some time, but the problem keeps coming back.
My battery is from March 2020, and I have few problems with it running out (like battery would deplete just after 2 weeks of the car sitting in garage; I don't drive much).
Sparkplugs have been changed last year when the car had 48kkm on the odo, in August I had the annual service (oil, filters), I make around 3000-4000 km a year.
Generally the car was trouble-free up to now.
Any ideas? thanks!
Sponsored
