My 2018 Promaster city with the Tiger shark 2.4L multiair only has 9k miles. I took it in for an oil change at 5500k after it stalled at a traffic light . they changed the map sensor. Been noticing a slight knocking sound when I accelerate. does not happen when parked only driving. It drives fine, but sometimes it sounds like an old beat 4 cylinder. I have a video up.

 

Even at idle it sounds like it rattles pretty good..... What's that all about? While driving, everything sounds pretty normal, I am not really hearing anything unusual.

 

These small 4 cylinder engines sound like that while idling and i can't reproduce the issue while parked. I know it's hard hear in my video, but there is a difference and I can hear what other are calling "spark knock" while driving and the engine is under load (about 20mph). It's almost like a faint backfire gargling sound after you accelerate. Another youtuber in another car had it much worse and documented much clearer here.

 

If it's spark knock, and it started after changing the map sensor, I would be looking very hard at that sensor......

 

I took the van to dealership and we reviewed my prior two service tickets. In June 2019 the fuel sensor and hose was replaced. In August 2019 The map sensor was replaced.

I reported the knocking and oil consumption and that the tail pipe has thick black soot . They want to do an oil consumption test and drive the car. The called today that the van was ready but they could not hear the knocking - I am doubting they even drove it... the service agent said he felt very sure the car would have the engine replaced when I came back in 1000 miles to check oil consumption. BUT, in the meantime they are going to have me driving around with this knocking noise.

 

Hi Nosunbeach, I am sorry to hear that you have these concerns with your ProMaster. If you need an extra layer of support when you visit your dealer again, feel free to send us a PM. We are always happy to help.
Rob
DodgeCares