Engine: 70 R: - Cutting out

Vic Clarke · Jan 18th, 2009, 14:37

Hi

I have a V70 2.5 auto 1999. When the engine is warm, and the car is in park, when I rev the engine, the revs climb as they should, then almost drop to cutting out. Also when I come to stop, revs drop to almost cutting out again. Any help please.

JamesS40 · Jan 18th, 2009, 15:25

don't know if its true for volvos, but it sounds to me like the idle control valve. I'm sure i'll be proved wrong shortly

crustycrutch · Jan 18th, 2009, 17:12

Not sure if its any help but I had exactly the same problem on my 850S. I cleaned out the throttle valve flap unit thingy (see other posts), gave the MAF a good shot of contact cleaner, disconnected the battery for an hour and thoroughly cleaned the terminals and the terminal clamps. It took a about twenty miles to settle but I assume the ECU reset itself and now the car runs really smooth with a steady 800rpm idle (and its approaching 200k miles!). I don't know if what I did was right but it cost me nothing but an hours effort and the car is running great. Try it?

DmcL · Jan 18th, 2009, 17:44

have had a similar problem on a previous car and it turned out to be a dirty MAF. first thing id try is removing the MAF and spraying de-greaser on the sensor inside the tube. let it dry out and refit.

alternately could be idle control valve. after that it gets a bit harder to figure out, maybe a vacuum leak, bad connection, faulty sensor, etc..

Chris_Rogers · Jan 18th, 2009, 18:35

First a '99 car will have an electronic throttle module (ETM) have a look at the ETM forum.

The non turbo version also has an idle control valve, this may well be dirty or sticking so it's worth cleaning the ETM and the idle air valve.

Jan 18th, 2009, 14:37	#1
Vic Clarke Junior Member Last Online: Aug 5th, 2009 09:33 Join Date: Jul 2008 Location: Nottingham	Cutting out Hi I have a V70 2.5 auto 1999. When the engine is warm, and the car is in park, when I rev the engine, the revs climb as they should, then almost drop to cutting out. Also when I come to stop, revs drop to almost cutting out again. Any help please.

Jan 18th, 2009, 17:44	#4
DmcL WTF? Last Online: Apr 30th, 2009 18:22 Join Date: Sep 2008 Location: Derry, N.I.	have had a similar problem on a previous car and it turned out to be a dirty MAF. first thing id try is removing the MAF and spraying de-greaser on the sensor inside the tube. let it dry out and refit. alternately could be idle control valve. after that it gets a bit harder to figure out, maybe a vacuum leak, bad connection, faulty sensor, etc.. __________________ 1989 325i SE, 1991 740GL

Jan 18th, 2009, 15:25	#2
JamesS40 Junior Member Last Online: Apr 20th, 2009 21:30 Join Date: Jan 2009 Location: Rochester, kent	don't know if its true for volvos, but it sounds to me like the idle control valve. I'm sure i'll be proved wrong shortly

Jan 18th, 2009, 17:12	#3
crustycrutch New Member Last Online: Apr 15th, 2009 18:05 Join Date: Nov 2008 Location: chelmsford	Not sure if its any help but I had exactly the same problem on my 850S. I cleaned out the throttle valve flap unit thingy (see other posts), gave the MAF a good shot of contact cleaner, disconnected the battery for an hour and thoroughly cleaned the terminals and the terminal clamps. It took a about twenty miles to settle but I assume the ECU reset itself and now the car runs really smooth with a steady 800rpm idle (and its approaching 200k miles!). I don't know if what I did was right but it cost me nothing but an hours effort and the car is running great. Try it?

Jan 18th, 2009, 18:35	#5
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	First a '99 car will have an electronic throttle module (ETM) have a look at the ETM forum. The non turbo version also has an idle control valve, this may well be dirty or sticking so it's worth cleaning the ETM and the idle air valve.

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