vr series 2 idol an choke problems ane 1

[markhayes]

hay holden fanats, i have a vr series 2 commodore with a weird as problem when i warm my car up in the morn my choke kicks in for about 45 sec an then drops as if it were warm an all day when i start the car it happens again an again even when the car is really warm,.second problem is when im cruisin on my local highway at about 80 at a set speed the car feels like its trying to drop a gear an slightly revs a little higher an lower like its spasiming an i dont know why an it happens more then i like to think about can any one give a dummy an answer cause im stuffed.

[chrisdoesitbetter]

first things first, try this - Checking error codes VR/VS (Revised) see what you get from that.

breifly from what your saying, it sounds like your torque converter is on its way out, but that would probably set a code. when was the last time you changed trans fluid? next time you go on the highway leave the car in third instead of D, this is meant to prevent the torque converter from completeyly "locking up".

as for the cold start problem, it is most likely your temp sensor, a sensor that adjust fuel by the temperature of your coolant and its meant to help the car run better when cold.

check your codes and get back to us.

[markhayes]

ok checked codes its a twelve witch i dont understand,An the temp sensor i keep asking car parts retailers for a temp sensor an they keep giving me a temp sender, is there a difference an why dont they know what it is ,i also checked the trans fluid ( ive only owned it 6 months )
an its pretty brown so i thinks tommorrow is a oil change day.

[chrisdoesitbetter]

yep definately change your trans fluid, the difference between the two is, the sender sends a current to your gauge to tell you the tempature of your coolant, and the sensor tells your ecu the motor needs more fuel. how many times did you get code 12?

[markhayes]

i think 3 i checked it then quickly turned it off an thanks for the info on the sensor ill be sure to tell em that

[Brett_jjj]

i think 3 i checked it then quickly turned it off

Let it go through for around a minute or two.It will flash up code 12 three times,then flash up any logged error codes.It will just continuously flash code 12 if there are no logged errors.

[markhayes]

ok changed my temp sensor ,hopefully tommorrow morn i will see a result when i warm it up, still needs a trans oil change but im gettin on it an i will let yous know thanks for yas help

[delcowizzid]

it will rev high then the revs will slowly drop when its started its normal

[markhayes]

i re checked the codes still came up with 12 three times i waited an it kept producing twelve

[chrisdoesitbetter]

mustnt have set a code then, have you changed the temp sensor yet? what r the results?

[markhayes]

hay chris changed temp sensor ,an this morn it still done the same thing ,but after being warm an turning off again an restartin it reduces the high level rev faster wich is a step forwad,but the choke still aint kickin in properly.

[Brett_jjj]

These engines dont use a choke.The ECU enrichens the fuel/air mix to suit the ambient temperature so the engine can run perfectly no matter what the ambient temperature is.Thats why these vehicles with engine management systems will run perfectly and not splutter or stall when they are cold.They are a world away from old engines that would use a choke and would need to be warmed up just to run or idle properly.It can be 30 above or 30 below and they always (well mostly always) start first go and not stall etc.

[baza]

MARKHAYES from reading your idling problem i reckon the IAC steper motor on the throttlebody needs cleaning or if still no improvement , replace it . they are about $ 90 from holden. the IAC controls the idle speed and when engine is cold it should idle faster for about 1 minute, then drop down to around 800 revs. its best if you remove the throttlebody to take the IAC off , unplug the loom connector first. give the hole in the throttlebody where the IAC goes a good clean out with carby- t-body cleaner. you might need a TOR-X screwdriver set to remove the IAC screws on the thrttlebody. hope this helps you.......

[markhayes]

yeah sounds like it could be that i have had my throttle body of a couple times an noticed alot of crap an dirt around in the sensors an other parts ill give it a crack an let ya know thanks baza