Clubjazz - Honda Jazz & HR-V Forums

Honda Jazz Forums => Honda Jazz Mk2 2008-2015 => Topic started by: lexi on October 03, 2014, 09:16:09 PM

Title: Cold start shifting on the i shift
Post by: lexi on October 03, 2014, 09:16:09 PM

  What is the official reason for the initial sticky gear change while engine is cold?  Half a mile until change gets normal. If very cold on take off, she doesn't want to get out of first really.

   Is it the coolant temp?
   The gearbox servo temp?

   Was there a software update for it?

Title: Re: Cold start shifting on the i shift
Post by: guest2662 on October 04, 2014, 09:45:44 AM

all you have to do is start in auto for a few meters then knock it into manual then back into auto that's it that's what I do

Title: Re: Cold start shifting on the i shift
Post by: lexi on October 04, 2014, 09:57:42 AM

  Thanks Boatman.  I use paddles till it warms up. 

   It is not the answer though is it?

Title: Re: Cold start shifting on the i shift
Post by: stiggysawdust on October 06, 2014, 09:11:39 PM

My car doesn't have this problem. Doesn't seem to be any different whether cold or hot.

Title: Re: Cold start shifting on the i shift
Post by: lexi on October 06, 2014, 09:26:25 PM

  That is interesting Stiggy.

       So even with cold sensor lit your changes are normal?  I think mine go normal when the light goes out.

Title: Re: Cold start shifting on the i shift
Post by: stiggysawdust on October 06, 2014, 09:42:56 PM

I have never noticed any difference. But next time I use it I will take particular notice and let you know.

Title: Re: Cold start shifting on the i shift
Post by: lexi on October 06, 2014, 09:47:32 PM

  Thanks mate  8)

Title: Re: Cold start shifting on the i shift
Post by: lexi on October 10, 2014, 05:37:34 PM

  I found something out today with this i sHIFT.  When started today from cold, I gave it the customary 30 second idle (old habit).  I then took off rather briskly as I was in a hurry. Hey man.........the change was so much better.  I have been nursing this thing from cold..........you know?.....like a flippin Jazz driver! ;D

  When cold, it must look for the higher revs before it changes .

Title: Re: Cold start shifting on the i shift
Post by: guest4977 on October 10, 2014, 08:33:36 PM

Hi Lexi, sounds like me today, I had my trainers on instead of work shoes and took off rather quickly, thought it was my trainers and being heavy footed in them.  In the morning she has to tackle a steep incline when cold and it does feel a struggle, can you flood the engine if you give it too much acceleration?

Title: Re: Cold start shifting on the i shift
Post by: lexi on October 10, 2014, 10:28:26 PM

Quote

can you flood the engine if you give it too much acceleration?

  If you mean while accelerating from cold, then no.  No throttle needed when starting .
   I mean, don't thrash or labour a cold engine..........be nice to it  :D

Title: Re: Cold start shifting on the i shift
Post by: stiggysawdust on October 11, 2014, 12:01:42 PM

Yes, there is a difference after all.
Revs at tickover are higher when cold, and revs go slightly higher before changing gear until engine has warmed up.
As I don't tend to dawdle I had never really noticed it before.
I suppose it all helps to keep the power/torque similar to when the engine is running at normal temperatures and gives a nice smooth drive.

Title: Re: Cold start shifting on the i shift
Post by: applicationcen on November 03, 2014, 12:55:32 PM

Yep - I have noticed that it hangs on to first for rather too long when starting from cold. Makes it quite clonky.

Title: Re: Cold start shifting on the i shift
Post by: jamesdean on January 06, 2015, 09:43:29 PM

Yes, It does take a few miles to settle the i-shift and for the car to sound quiet.
Be aware that accidentally revving a cold jazz can coat the air filter with oil!
This despite the car not using " any oil" between 5k changes [ 0W - 30 SAE]
Being mean, I washed the filter in petrol, dried it and reused it [ take CARE]
I never stress the engine until the blue light goes out.