2.4 lpt caugh/stutter

brickexpress · Apr 6th, 2018, 19:46

Evening..
I have a 98 v70xc that idles and runs well generally however it caughs or judders, once only, at what seems to be around 50-60mph, appears to happen only when lifting off and back on the throttle very slightly when traveling at a fixed speed.
Im about to replace the vac lines, cleaned throttle body & idle control, pcv system replaced, plugs dont look v old. Delayed checking the fuel pressure regulator/filter, painfull to access on these I believe.
What do you think?

SteveSarre · Apr 7th, 2018, 11:22

Hi,

Probably worth reading about symptoms of a failing ETM
eg
https://www.volvoforums.org.uk/showthread.php?t=38602

Steve

brickexpress · Apr 16th, 2018, 21:43

thanks
will do..

dodgyvinyl · Apr 27th, 2018, 23:08

Did you sort this?

1998 so likely not drive by wire (ETM).

My first look would be MAF sensor, I've had several start to fail just as you describe. If it's original part, it's overdue failure.

After that, maybe look at cam and crank sensors.

Fuel filter is easy access / change, cheap and should be done as routine maintenance anyway. Belt it a few times with a hammer for a possible short term fix.

Hope this helps.

Apr 6th, 2018, 19:46	#1
brickexpress Junior Member Last Online: Jun 12th, 2018 23:49 Join Date: Mar 2015 Location: york	2.4 lpt caugh/stutter Evening.. I have a 98 v70xc that idles and runs well generally however it caughs or judders, once only, at what seems to be around 50-60mph, appears to happen only when lifting off and back on the throttle very slightly when traveling at a fixed speed. Im about to replace the vac lines, cleaned throttle body & idle control, pcv system replaced, plugs dont look v old. Delayed checking the fuel pressure regulator/filter, painfull to access on these I believe. What do you think?

Apr 7th, 2018, 11:22	#2
SteveSarre Premier Member Last Online: Today 15:47 Join Date: Oct 2004 Location: London/West Country	Hi, Probably worth reading about symptoms of a failing ETM eg https://www.volvoforums.org.uk/showthread.php?t=38602 Steve __________________ V70 2.5 Turbo AWD Man. 1999 Red V70 2.5 10V Auto 1998 Green C70 T 20V Auto Conv. 2001 Blue, C70 T5 Auto Conv. 2000 Blue V70 2.5 Turbo AWD Auto 1998 Green, V70 2.5 10V Auto BiFuel 1999 Red (scrapped) V70 20v Auto 1999 Green (scrapped)

Apr 27th, 2018, 23:08	#4
dodgyvinyl Unsentimental Breaker Last Online: Dec 3rd, 2021 17:43 Join Date: May 2010 Location: Stratford Upon Avon	Did you sort this? 1998 so likely not drive by wire (ETM). My first look would be MAF sensor, I've had several start to fail just as you describe. If it's original part, it's overdue failure. After that, maybe look at cam and crank sensors. Fuel filter is easy access / change, cheap and should be done as routine maintenance anyway. Belt it a few times with a hammer for a possible short term fix. Hope this helps. __________________ No longer trading.

Apr 16th, 2018, 21:43	#3
brickexpress Junior Member Last Online: Jun 12th, 2018 23:49 Join Date: Mar 2015 Location: york	thanks will do..

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