Author Topic: Vacuum value at idle (rough idle problem).  (Read 5875 times)

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#30

Offline liamF

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Re: Vacuum value at idle (rough idle problem).
Reply #30 on: 07 February, 2021, 12:46:23 PM
Wow, that's impressive compared to mine, don't know what happened in first 20,000mls as I'm second owner. Found some info regarding MAP values in manual on this site

https://bob.ollis-brown.co.uk/manuals/cbf1000/2006-2008-CBF1000-A-6%20FUEL%20SYSTEM.pdf#page=3

in spec box on page 3
which gives value of 29-32kPa
converted to           217-240mmHg

and just wanted to compare values
Happy motoring  :046: :152:
Last Edit: 07 February, 2021, 12:49:49 PM by liamF

#31

Offline Mark91

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Re: Vacuum value at idle (rough idle problem).
Reply #31 on: 07 February, 2021, 04:53:12 PM
One question, Did you only disconnected the pipes from the MAP sensor or the cable too ?

#32

Offline liamF

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Re: Vacuum value at idle (rough idle problem).
Reply #32 on: 07 February, 2021, 05:23:37 PM
just vacuum pipes is enough as MAP doesn't work with pipe disconnected. ECU reverts to to normal air pressure. I have a Healtec diagnostic reader so can check that all sensors are working

#33

Offline liamF

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Re: Vacuum value at idle (rough idle problem).
Reply #33 on: 07 February, 2021, 05:51:58 PM
sorry forgot to mention you also need to clear fault code from having MAP disconected

#34

Offline Mark91

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Re: Vacuum value at idle (rough idle problem).
Reply #34 on: 07 February, 2021, 08:31:50 PM
When I disconnect the cable from the MAP sensor, directly after clean the fault codes, or 1. disconnect MAP, 2. sync the throttle bodies 3. clear the fault code storage?

#35

Offline liamF

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Re: Vacuum value at idle (rough idle problem).
Reply #35 on: 07 February, 2021, 10:22:36 PM
The final part, 1 disconnect vacuum pipes to MAP, 2 sync the 4 throttle bodies, reconnect MAP vacuum and electrics (if disconnected) and then clear fault code.  :028:
I believe this is how you clear codes by Art

https://www.cbf1000.com/index.php/topic,22756.msg259734.html#msg259734
Last Edit: 07 February, 2021, 10:53:34 PM by liamF

#36

Offline Mark91

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Re: Vacuum value at idle (rough idle problem).
Reply #36 on: 08 February, 2021, 06:35:33 PM
When I disconnected only the pipes I didnt have any fault codes. When I disconnected the cable also, the check engine continously lighted.
But now looks good without any fault code.

#37

Offline liamF

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Re: Vacuum value at idle (rough idle problem).
Reply #37 on: 08 February, 2021, 07:40:47 PM
Hi there Mark, when you disconnect any of the sensors the Fi light should flash a code for that sensor. Now when you reconnect it the ECU sees it and if all is good will not flash the Fi light :028: but the  diagnostic part of ECU stores the previous fault and its this stored code (in ECU memory) that  needs to be cleared.
I hope that makes sense.
For myself having a Healtec plug in code reader (similar to car OBD11) I'm able to see and clear it from laptop. In a previous post I put a link to Art (forum member) showing how to check codes by shorting wires on RED diagnostic plug under the seat.
Whether clearing stored codes is essential or not I don't know, but like any computer I'm sure its good

 


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