A lot of vehicles have a fast idle solinoid mounted to the throttle body, this brings up the idle speed when the air conditioner is running.
This unit may have a problem where it is not releasing from the fast idle position to the standard idle speed.
Also check for any of the small vacume hoses that maybe off or broken.
JC.
Edit for additiom.
-- Edited by justcruisin01 on Sunday 17th of March 2013 06:42:34 PM
justcruisin01 said
04:29 PM Mar 17, 2013
Happywanderer wrote:
This might not be relevant in your case John, but my Toyota Hi-Ace was doing the same a while back. Mine has a manual choke. I was told by the mechanic not to use the choke at all, to pump the accelerator 2 or 3 times which gives the same as using the choke. It works and I haven't used the choke since and no fast idling at all.
Chalk & cheese. Diesel vers petrol.
-- Edited by justcruisin01 on Sunday 17th of March 2013 04:32:24 PM
johnnz said
06:13 PM Mar 17, 2013
I have a Coaster with the 3.4 diesel engine. I have an issue with the idling speed, it over revs when idling. I have the adjustment on ther air intake screwed off but the idling speed is high.
Have any other Coaster owners had this problem, or any advise appreciated.
The engine is in otherwise good condition, no blue smoke and get good fuel consumption.
Johnnz
Happywanderer said
06:34 PM Mar 17, 2013
This might not be relevant in your case John, but my Toyota Hi-Ace was doing the same a while back. Mine has a manual choke. I was told by the mechanic not to use the choke at all, to pump the accelerator 2 or 3 times which gives the same as using the choke. It works and I haven't used the choke since and no fast idling at all.
Happywanderer said
12:13 AM Mar 18, 2013
Sorry JC, not understanding that one.
Santa said
03:30 AM Mar 18, 2013
Happywanderer wrote:
Sorry JC, not understanding that one.
Johnnz is a diesel HW, doesn't have a choke.
Happywanderer said
04:44 AM Mar 18, 2013
Ok, thats why I said might not be relevant to his situation.
bill12 said
12:56 PM Mar 18, 2013
I would have someone look at the diafram in the governer as they are rubber , and do deteriorate over time. Also, check that there are no air leaks in the lines to the governer.A hole in the diafram will made it run fast as its getting more air.This is fairly technical stuff so I suggest a good mechanic. Bill
justcruisin01 said
03:56 AM Mar 19, 2013
bill12 wrote:
I would have someone look at the diafram in the governer as they are rubber , and do deteriorate over time. Also, check that there are no air leaks in the lines to the governer.A hole in the diafram will made it run fast as its getting more air.This is fairly technical stuff so I suggest a good mechanic. Bill
Bill , This was going to be my next suggestion but there has not been any feed back from Johnnz.
bill12 said
01:18 PM Mar 19, 2013
Ok. I had this same problem in a boat diesel , some years ago. Fixed it with some super glue out in the middle of the gulf of carpentaria.The motor was hunting and as it was a genset, couldn,t keep the voltage right.Workes fine til week got back to port 6 weeks later. Billl
johnnz said
03:36 PM Mar 19, 2013
Thanks for the responces, sorry for the delay, away from my computer yesterday. I will have to get someone to check on the governer diaphram, that I think is beyond me.
A lot of vehicles have a fast idle solinoid mounted to the throttle body, this brings up the idle speed when the air conditioner is running.
This unit may have a problem where it is not releasing from the fast idle position to the standard idle speed.
Also check for any of the small vacume hoses that maybe off or broken.
JC.
Edit for additiom.
-- Edited by justcruisin01 on Sunday 17th of March 2013 06:42:34 PM
Chalk & cheese. Diesel vers petrol.
-- Edited by justcruisin01 on Sunday 17th of March 2013 04:32:24 PM
I have a Coaster with the 3.4 diesel engine. I have an issue with the idling speed, it over revs when idling. I have the adjustment on ther air intake screwed off but the idling speed is high.
Have any other Coaster owners had this problem, or any advise appreciated.
The engine is in otherwise good condition, no blue smoke and get good fuel consumption.
Johnnz
I was told by the mechanic not to use the choke at all, to pump the accelerator 2 or 3 times which gives the same as using the choke. It works and I haven't used the choke since and no fast idling at all.
Johnnz is a diesel HW, doesn't have a choke.
Bill , This was going to be my next suggestion but there has not been any feed back from Johnnz.
Thanks for the responces, sorry for the delay, away from my computer yesterday. I will have to get someone to check on the governer diaphram, that I think is beyond me.