in my auto gear honda fit gp1 hybrid car, (mileage 56 000 KM)
I had a engine tune up and changed my injectors (8 injectors) last month and after 2 weeks i started getting a slight knock (jerk or shaking). i remember i have had this once or twice in the last 6 month but it wasnt noticeable and looked like to be as a miss. anyway, now everyday morning when i start the car and drive for like half and hour or hour, it goes smooth and nice. and then in a while it gives the knock. (the time is not fixed, some days in 45 minutes, and some days in 30 minutes and sometimes in 20 minutes after first starting to drive it comes)
The knock is like, when i stop at a traffic light and accelerate it comes. it only comes after a break or a stop and accelerate so it comes in low speed. then when driving with the knock, it gets a bit worst and knock (jerk or shaking) goes up, when i drive a little more it becomes more worse. then when i stop for few hours and start back then knock (jerk or shaking) is less and smoothness is bad. so i figured out this is something to do with a heat. when one of vehcile's part becomes very hot it gives the knock.
so i went to a small mechanic and as advised changed my Gear box oil (ATF). it didnt fix the issue.
then i took it to Honda company by when i got a check engine light and they told to run without the EGR valve, then i did it that and noticed that knock (jerk or shaking) is 50% less but car is not at all smooth. (it takes too much power and was hard) i felt so when driving. then they told to clean it the EGR and drive as the Honda company diagnosed EGR valve is causing trouble. after cleaning it didnt work, so as they told i changed the EGR valve which costed around 500$.
And then my vehicle was super smooth and very very comfortable to drive. later after few hours of driving here comes the same knock (jerk or shaking). which confused me. apart from that the honda company told this is not a problem with gear box, (which means they told its not a judgger)
Then i took it back to my local bass as he suspected it can also sometimes cause with fault fuel pump. then i changed that too. still the issue is not fixed.
Now after having a small internet research i found this is a bit common issue, but only issue is finding the exact issue is difficult. Now i am confused what to do,
Company told they will need to remove the transmission and see in the worst case. some times if its a damaged flyweel it can happen. so before taking it to any place to repair i just want to get an experts advise here.
Should check in to these things to ?
- Spark Plug Wires or Spark Plug
- Starter clutch
- ignition coil | coil packs
- motor mount
- Catalytic Converter
I really really appreciate any feedback that will help me to sort out this issue.
UPDATE: The company also told me that not all issues will have an error code that can be read through obd 2, electrical issues will be displayed but not mechanical as they told. is that correct?
Yesterday i had a fuel pump change as well, but still the issue is there, please can somebody advise as what to do ? really appreciate. can this be a gear box issue with a burnt flywheel ?
Yesterday i had a test drive
When the car was started it went super smooth, after a while like 15 mins. the shaking came back when i stopped at a traffic and accelerated when green lit. (please note the shaking comes only when accelerating from a stop (when going from zero - 10/20 kmh). its not shaking when i am holding the break or its not shaking when the vehicle is idle.
then at almost every stop light, when i accelerated it came. and when i took of the leg from gas pedal and pressed again, it went but not smooth as early.
Then at 60 speed i noticed RPM at 3 and car was like going in gear 1 or 2.
Then at 80 speed also i noticed RPM at 3 and car was like going in gear 1 or 2.
after that vehicle was back to a drivable state but shake was there still after a stop or break when accelerating.
Can anybody provide some advice based on my latest information please?
Yesterday i had a injector clean at honda company and they told its all fine. when i started to drive the car today again the bucking or knocking came up and car wasnt smooth as before. when eco mode was on it started to knock or buck a little more. i think A/C also has a connection to this. when AC was off and ECO mode was off. knock was less. so i turned it off and drove but still its annoying to drive. its dancing like a horse when starting at a stop light. can this be related to eco system in gp1 and EGR valve? but today i noticed when the egr valve was disconnected just 1 hour ago, car wasnt smooth but knock or buck didnt come which came while i was driving and half a way i stopped and disconnected the EGR Valve and continued and found no problem. i know its not good to drive without egr valvue so i connected it back after checking.
can the problem be with EGR valve sockets ? because the EGR valve i have put is from a second hand vehicle but a less mileage and it looked almost new. i would say no carbon. so is there anything else connecting with EGR valve like the socket that connects EGR valve and the engine ? what is EGR Passage ? should i clean that too.
what problems will i have if i remove the EGR valve and drive, i got a engine check light once so didnt want to drive with that removed.
I got it confirmed that its a problem with CVT Gear Box, a past automobile engineer at honda found the issue. he took a long drive with me and he changed parts with a another same running vehicle. in the start gear of CVT something is wrong and he suggested to get the gear box replaced. replacing is better than trying to fixing.
There was also a problem with a injector and coil, so he fixed it and vehicle is smooth now only the knock comes once in a while. (which will go away once the gear box is replaced)