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High Idle

Jap_Muscle
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Ok i manage to figure it out although it didnt really help. I got a bit desperate and ended up re-initialising the pfc and it seems to be under control to a certain degree. Hunts still around 860-920rpm. Sounds lumpy so its not all bad.

Tps on idle is around 0.39-0.40v on idle but how are u suppose to increase the WOT voltage?

from paulr33s PFC guide im suppose to let it idle for up to 30min to let it relearn while turning AC on and off.

Bit devo'ed about losing my tune though =[

2mins to reload tune, amazed your car is even running after initialising it... you rotate the whole unit to adjust the voltage.

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Jap_Muscle
Jap_Muscle

Great news guys!! Originally had the starter motor replaced as the car has been struggling to start over the past month. Suspected bad earth could have caused the high idle. Had it replaced but did n

Jap_Muscle Mentor

Jap_Muscle

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Thats good to know thanks Trent. I got work this sat and sun until 5pm so depending on how busy you are i might have to wait till next week.

I managed to figure out how to adjust the idle voltage by turning the whole unit but is there a way of adjusting WOT voltage without affecting idle voltage? Its almost as if i cant change the range, i can only adjust the minimum and maximum, which in turn adjusts the maximum and minimum.

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Jap_Muscle

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LOL

Well this is embarrising. Went to start the car to go to work this morning and the car is barely running. I guess thats what you meant Trent. I didnt realise the car had to be turned off and on for the ECU to be re-initialised. Engine check light is on even while idling so i switched it straight off. Looks like i might have to get it towed to you Trent.

Unless someone has a FC Hacko or similar i can borrow?

mikeyR33-T Collaborator

mikeyR33-T

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Great news guys!!

Originally had the starter motor replaced as the car has been struggling to start over the past month. Suspected bad earth could have caused the high idle. Had it replaced but did not fix the issue. We then replaced the TPS due to a weird a voltage range from 0.39v - 2.56v. After resetting this and replacing the actual TPS unit, we were hopeful but still no change.

Finally after replacing the Idle Control Regulator (had to rip the plenum off to do this) the cars idling at a smooth 950rpm.

After close to a year of sounding like i was launching off the line at every intersection, i am pleased to say the problem has been solved.

Thank you to everyone help!!!

p.s - if anyone is having problems with idle please shoot me a PM, ill try to be as helpful as i can.

HELPPPPPPPPPPPPPPPP - could pm so will post below:

hi read ur post about idle, well I have idle issues mainly first thing in the morning, will kick car over, it will idle rough at around 500rpm for like 5secs then die, unless i give it a lil throttle...

could be cold start issues or more serious.....

also when accelerating normal or quick the rpm will climb but then feel like its backed off, even tho my foot is firm on the pedal...

I am getting dyno done, some say R&R some say bad TPS, some say bad AFR... I have no idea...

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