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2004 XC70 engine shuts off, poor running

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oceanview12
Posts: 2
Joined: Mon Sep 30, 2019 1:15 am
Year and Model: 2004
Location: bc

2004 XC70 engine shuts off, poor running

Post by oceanview12 »

hello, found this forum thru google... need some help diagnosing...

2004 xc70 awd w/turbo...

so the car started randomly shutting off when coming to a stop or after stopping; just turn the key and it would start back and run fine for days then start the random shut offs; sometimes a few times a day.

noticed the following now...

when starting up one has to keep feathering the ex at higher rpm's while the engine is running; the engine seems to sputter/miss fire but feathering between low to high rpm's clears it and eventually after about 2/5 minutes it idles, which it does very smoothly;

once the engine is turned off and you try to restart, you have to do the above steps again. it sometimes feel like it moisture/water in the fuel as the sputtering/popping sounds reminds me of the old carb type engines;

i'm at a loss now as to what to look at; I do have a fuel pump and throttle body from a scrapped car (exact same model) but i'm hoping it could be something minor or simple that i have not checked yet;

i replaced the fuel filter and added some methyl hydrate to absorb any moisture/water in the tank... still the same symptoms

and ideas...
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abscate
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Re: 2004 XC70 engine shuts off, poor running

Post by abscate »

That’s a common behaviour with an. Induction path leak, a break or misplaced hose between the air cleaner and the throttle body. You have to remove each piece and inspect carefully, you cannot inspect visually in a meaningful way
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oragex
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Re: 2004 XC70 engine shuts off, poor running

Post by oragex »

Read about FPS and PEM

Also have a look with a flash light at the CEM, search for what may look like traces on the cover from a water leak - may google as well about this common issue

If there is a misfire, it's usually a bad coil (will need to also put fresh plugs) www.youtube.com/watch?v=fnYUQh23p7Q
oceanview12
Posts: 2
Joined: Mon Sep 30, 2019 1:15 am
Year and Model: 2004
Location: bc

Re: 2004 XC70 engine shuts off, poor running

Post by oceanview12 »

thank you both for your input... i will start looking there...

oragex do you mean the computer elec modules under the
hood...

abscate.... it should be noted that a air tube to the turbo broke
at the bend many months ago, but the problem started happening
months later...

ps... fond memories... time for some ponce de creme and
some pastels soon...i know de flag well...
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abscate
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Posts: 23281
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 417 times
Been thanked: 1279 times

Re: 2004 XC70 engine shuts off, poor running

Post by abscate »

oceanview12 wrote: Mon Sep 30, 2019 8:23 pm thank you both for your input... i will start looking there...

oragex do you mean the computer elec modules under the
hood...

abscate.... it should be noted that a air tube to the turbo broke
at the bend many months ago, but the problem started happening
months later...

ps... fond memories... time for some ponce de creme and
some pastels soon...i know de flag well...
Together we achieve...... :D
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary
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