- 0
AutoLanka Cars For Sale
Post Your Ad Free [Click Here]
-
Recent Status Updates
-
Chinese are going to take over the automobile industry for sure. Tesla who was considered ground braking is shying away from the promised small EV and moving to Taxi cars as the competition is too strong. Then comes Chery with this small EV SUV. Looks like a Mini G Class / Jimny but is fully electric.· 5 replies
-
Interior Specialists? Every time I go over some bumps my seats squeak quite loudly and there is a massive rattle of a nail undone coming from inside the dashboard, anybody got any suggestions I could go to? My usual mechanic just said "turn the radio up"· 2 replies
-
I was watching a Yangwang U8 struggling to make it up a muddy hill on Youtube. I was wondering why cant an EV be more capable off road than an ICE vehicle. Given the fact that this behemoth has 4 individual motor on each wheel it should be able to direct power to the wheel that has more grip and stop power to the slipping wheel. Cant be rocket science right?· 3 replies
-
I woke up one day and I now want to buy a W140. The brain works in mysterious ways. It definitely doesn't understand the concept of money since I am nowhere near affording one.· 2 replies
-
-
Albums
-
Giko's Clicks
- By Giko,
- 0
- 0
- 75
-
Street2Track Mirigama 2022 (Sep 17th)
- By Giko,
- 0
- 0
- 25
-
Pannala Road Race 2016 (Dec 4th)
- By Giko,
- 0
- 0
- 4
-
Katukurunda Speed 2022 (Dec 4th)
- By Giko,
- 0
- 0
- 10
-
Concourse of Elegance 2020 - Hampton Court, United Kingdom
- By Crosswind,
- 3
- 0
- 90
-
-
Blog Entries
-
Recent Topics
Question
Ted
Dear Experts with my all the respect,
I am really messed with this IAC valve thing. My car has rotery solenoid valve as IAC. RSC coil for closing side and RSO for opening side. ECU provides a PWM to one and inverted to the other. (i.e. If RSO gets PWM with 75% duty cycle, RSC gets its inverted PWM which is 25%. This makes a resultant force to IAC open 50%.)
My data sheet gives the RSC and RSO values attached herewith. Please see picture 1.You can see resultant of IAC is at idling with no AC, is "closed".
But when I check it in my car, the resultant of IAC at idling with no AC is, "opened". Please see picture 2 & 3.
Picture 2 is RSO. Picture 3 is RSC. ( eventhough it should give inverted to each other please disregard it since it's an issue with oscilloscope.i.e. time shift does not shown by oscilloscope.)
1) I checked for vacuume leaks and none found.
2) I also checked these RSC, RSO values at different throttle adjusting screw setting. No change.
3) Checked IAC with values in datasheet and it was OKAY.
4) Also I checked idling speed which is at around 750 rpm.
5) Also I checked rpm when AC switched on which is increased from 750 to around 900.
Pic 1 - first two graphs are RSO and RSC without AC.
Pic 2 - RSC without AC
Pic 3 - RSO without AC
What is the issue in my car? Why can't I get the setup in the datasheet?
Link to comment
Share on other sites
4 answers to this question
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.