Honda HR-V Forum banner

HRV 2025 Flat spot

1 reading
155 views 8 replies 3 participants last post by  downunder  
#1 ·
Hello all love the forum
i am reposting this thread in the hope someone may have more advice
as i still have this issue 12 months later😱😱
hello all i have a well maintained 2015 HRV, a few months ago in winter it the issue started .
we have noticed the problem is considerably worse in the heat
when i take off from a dead stop, the car will just die huge flat spot, and if I feather the throttle gently, i can sometimes stop it from stalling.One, I'm off and accerating all good until i drop revs again to about 800rpm, then it really starts chugging accelerate and it's gone ??
It's a real mystery, no-one can work it out
As I said, it hardly does it in winter but in summer almost immediately.
the heat really exagerates the issue ??
turning the A/C off does help a bit, but i doubt that's related
So i proceeded a process of elimination.
  1. Car shows no error codes on a scan
  2. replaced spark plugs twice
  3. replaced coils twice
  4. ran several injector additives through 2 x tanks of fuel
  5. replaced air filter
  6. Throttle body clean
i would be so grateful for a solution we have lived with this for 18months now
all the best
Downunder
 
#2 ·
Have you tried checking your intake sensors. There is at least one sensor what will measure intake air temperature (not sure which one is it on a 2015 HR-V) and if your issue varies with air temperature, there might be your car is getting a wrong reading. I would check all sensors on the intake - MAF, MAP, Intake temperature.

Also -- how cold is it in winter and how hot is in in summer in your area? Please describe temperatures more accurately if possible, instead of winter/summer.