C70 S70 V70: - RPM Hunting at Idle

KenRL · Mar 12th, 2009, 13:04

My 2000, V70 engine has a tendency to hunt between 700 and 1000 RPM when at idle. This occures for the first 15 minutes when the engine has been left over nite. Sometimes the engine appears to misfire at 2000 RPM during the same period. I have replaced the plugs without any success. Has anyone had similar issues or suggested solutions.

Thanks Ken

sublimecantona · Mar 12th, 2009, 16:26

hi my 2000 C70 coupe T5, does the same (revs between 700-900) for about 3mins first thing in the morning but doesnt misfire. I just put it down to the engine being cold (and hoping its not more sinister) lol

Chris_Rogers · Mar 12th, 2009, 17:17

You may want to look at the ETM forum.

Mark710 · Mar 13th, 2009, 00:10

hi guys i had same problem with my 2.5 none turbo 850. i read an article about removeing the throtle mouth and cleaning it and also removeing dirt from the two pin holes in the baseof this unit and the breather pipe that is attatched to the bulkhead side. haveing scrubed it with rags and carb cleaner spray (well a freind did it for me , id love to pretend im mechanicaly talented but alas im not) my engine idled as sweat as hunny and very stable at 850 to 900 rpm.
the rags were free and the carb cleaner was about 4 quid plus mates hep cost a few coffees.
i hope this helps

Mark

outnumbered · Mar 13th, 2009, 06:23

Quote:

Originally Posted by KenRL

My 2000, V70 engine has a tendency to hunt between 700 and 1000 RPM when at idle. This occures for the first 15 minutes when the engine has been left over nite. Sometimes the engine appears to misfire at 2000 RPM during the same period. I have replaced the plugs without any success. Has anyone had similar issues or suggested solutions.

Thanks Ken

take a look at this thread and come to your own conclusion, i would budget for a new etm.

http://www.volvoforums.org.uk/showthread.php?t=61077
mike

outnumbered · Mar 13th, 2009, 06:24

Quote:

Originally Posted by sublimecantona

hi my 2000 C70 coupe T5, does the same (revs between 700-900) for about 3mins first thing in the morning but doesnt misfire. I just put it down to the engine being cold (and hoping its not more sinister) lol

the early stages of etm.

http://www.volvoforums.org.uk/showthread.php?t=61077
mike

KenRL · Mar 13th, 2009, 17:02

Thanks for thoughts. Finally bought a OBD2 code reader and found P0352 fault, (ingnition coil B). Removed cover for coils and noticed a possible pinched wire between head and cover due to erroded plastic wire cover. Switched coils for cylinders 1 and 2 and put tape over wires. After two drives no rpm hunting and no codes. If problem is solved the code reader is paid for.

Ken

sublimecantona · Mar 14th, 2009, 08:15

Ken
How much r these code readers and where can i get one frm??

Mar 12th, 2009, 13:04	#1
KenRL New Member Last Online: Oct 25th, 2014 00:07 Join Date: Mar 2009 Location: Brockville	RPM Hunting at Idle My 2000, V70 engine has a tendency to hunt between 700 and 1000 RPM when at idle. This occures for the first 15 minutes when the engine has been left over nite. Sometimes the engine appears to misfire at 2000 RPM during the same period. I have replaced the plugs without any success. Has anyone had similar issues or suggested solutions. Thanks Ken

Mar 13th, 2009, 17:02	#7
KenRL New Member Last Online: Oct 25th, 2014 00:07 Join Date: Mar 2009 Location: Brockville	KenRL Thanks for thoughts. Finally bought a OBD2 code reader and found P0352 fault, (ingnition coil B). Removed cover for coils and noticed a possible pinched wire between head and cover due to erroded plastic wire cover. Switched coils for cylinders 1 and 2 and put tape over wires. After two drives no rpm hunting and no codes. If problem is solved the code reader is paid for. Ken

Mar 12th, 2009, 16:26	#2
sublimecantona Junior Member Last Online: Jul 27th, 2010 10:03 Join Date: Jan 2009 Location: northamton	hi my 2000 C70 coupe T5, does the same (revs between 700-900) for about 3mins first thing in the morning but doesnt misfire. I just put it down to the engine being cold (and hoping its not more sinister) lol

Mar 12th, 2009, 17:17	#3
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	You may want to look at the ETM forum.

Mar 13th, 2009, 00:10	#4
Mark710 New Member Last Online: Mar 21st, 2009 12:53 Join Date: Feb 2009 Location: bangor	hi guys i had same problem with my 2.5 none turbo 850. i read an article about removeing the throtle mouth and cleaning it and also removeing dirt from the two pin holes in the baseof this unit and the breather pipe that is attatched to the bulkhead side. haveing scrubed it with rags and carb cleaner spray (well a freind did it for me , id love to pretend im mechanicaly talented but alas im not) my engine idled as sweat as hunny and very stable at 850 to 900 rpm. the rags were free and the carb cleaner was about 4 quid plus mates hep cost a few coffees. i hope this helps Mark

Mar 14th, 2009, 08:15	#8
sublimecantona Junior Member Last Online: Jul 27th, 2010 10:03 Join Date: Jan 2009 Location: northamton	Ken How much r these code readers and where can i get one frm??

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