General: - Engine shuddering at idle

Andy663 · Aug 13th, 2018, 22:36

2003 S80 2.4 petrol AUTO, 120k
Hi,
My car has started to shudder when I switch it on, it happens when the car is in park and lasts about 10 seconds. It sounds as if the engine is hunting, but the rev counter remains constant and doesn't move. When I put the car into drive and keep my foot on the brake, I feel the shudder again through the brake pedal. When I reverse out my my drive it continues to shudder, but when I start to drive normally it goes a away.

The only other thing out of the ordinary is when it's changing up from 1st to second, there's a slight pause before it engages the gear and the revs go up. This has only happen once or twice in the past week. Also, once when changing from 4th to 5th it seemed to 'bump' into gear.

Any ideas?

pierremcalpine · Aug 14th, 2018, 00:42

I'd be tempted to start by cleaning the throttle body.

Andy663 · Aug 14th, 2018, 18:30

The Engine Management Light came on today, the code generated was P0304, misfire from cylinder 4. I'm guessing this is a coil, since the plugs were changed at the last service a couple of months ago.

I did notice there are 2 thin cables coming out of the air filter cover, one of them has broken off at the other end. What are these and where do they connect into?

thanks

oragex · Aug 14th, 2018, 20:02

Most probably an ignition coil, see the other topic here on the forum (please don't drive the car until fixed)

Ripmax · Aug 15th, 2018, 11:02

Quote:

Originally Posted by Andy663

The Engine Management Light came on today, the code generated was P0304, misfire from cylinder 4. I'm guessing this is a coil, since the plugs were changed at the last service a couple of months ago.

I did notice there are 2 thin cables coming out of the air filter cover, one of them has broken off at the other end. What are these and where do they connect into?

thanks

Pretty sure those are vacuum lines on the non-turbo model.

ASt85 · Aug 15th, 2018, 11:14

Quote:

Originally Posted by Ripmax

Pretty sure those are vacuum lines on the non-turbo model.

It is probably the one that connects to the inlet manifold near pot no 5 - the rubberised right angle connector at the end of the tube sheared on mine.

oragex · Aug 15th, 2018, 16:09

This is for the non turbo https://www.youtube.com/watch?v=aRGn6d2iAGE

Ripmax · Aug 15th, 2018, 17:28

I don't think those vacuum lines are related to your issue. I ran a cone filter on my 2.4NA V70 and just left those lines disconnected

and had no issues

Aug 13th, 2018, 22:36	#1
Andy663 New Member Last Online: Sep 10th, 2018 12:49 Join Date: May 2013 Location: Irvine	Engine shuddering at idle 2003 S80 2.4 petrol AUTO, 120k Hi, My car has started to shudder when I switch it on, it happens when the car is in park and lasts about 10 seconds. It sounds as if the engine is hunting, but the rev counter remains constant and doesn't move. When I put the car into drive and keep my foot on the brake, I feel the shudder again through the brake pedal. When I reverse out my my drive it continues to shudder, but when I start to drive normally it goes a away. The only other thing out of the ordinary is when it's changing up from 1st to second, there's a slight pause before it engages the gear and the revs go up. This has only happen once or twice in the past week. Also, once when changing from 4th to 5th it seemed to 'bump' into gear. Any ideas?

Aug 14th, 2018, 00:42	#2
pierremcalpine Premier Member Last Online: Jan 3rd, 2024 14:43 Join Date: Feb 2012 Location: Toronto Canada	I'd be tempted to start by cleaning the throttle body. __________________ 2003 V40 1.9T B4204T4, 197,000miles (sold but alive!), 2004 S60 2.5T, 160,000miles, 2010 V70 3.2, 125,000miles, 2002 V70XC 2.4, 175,000miles Click here for my x40 and V70 P3 repair guides

Aug 14th, 2018, 20:02	#4
oragex Premier Member Last Online: Jul 26th, 2021 21:24 Join Date: Jun 2013 Location: Coldnada	Most probably an ignition coil, see the other topic here on the forum (please don't drive the car until fixed) __________________ Several Volvo Repair Videos https://www.youtube.com/playlist?lis...ECTts0FSVSOT_c

Aug 15th, 2018, 16:09	#7
oragex Premier Member Last Online: Jul 26th, 2021 21:24 Join Date: Jun 2013 Location: Coldnada	This is for the non turbo https://www.youtube.com/watch?v=aRGn6d2iAGE __________________ Several Volvo Repair Videos https://www.youtube.com/playlist?lis...ECTts0FSVSOT_c

Aug 15th, 2018, 17:28	#8
Ripmax Member Last Online: Aug 7th, 2023 16:27 Join Date: Mar 2018 Location: Leicestershire (with VIDA pm me)	I don't think those vacuum lines are related to your issue. I ran a cone filter on my 2.4NA V70 and just left those lines disconnected and had no issues __________________ Current - 2004 Volvo V70R Titanium Grey - 67k 2008 S60 2.0t Sport Electric Silver - 156k 2000 V70 Classic 2.4M Signal Red - 240k 2001 Audi A6 C5 Sport Avant 1.9 TDi - 173k

Aug 14th, 2018, 18:30	#3
Andy663 New Member Last Online: Sep 10th, 2018 12:49 Join Date: May 2013 Location: Irvine	The Engine Management Light came on today, the code generated was P0304, misfire from cylinder 4. I'm guessing this is a coil, since the plugs were changed at the last service a couple of months ago. I did notice there are 2 thin cables coming out of the air filter cover, one of them has broken off at the other end. What are these and where do they connect into? thanks

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