V70: - Missing, stalling - getting worse - Page 2

ShadeTek · Jul 28th, 2009, 09:11

Have the dizzy and leads been changed before or since you have had the car? It sounds like it might be in that area. If the crank sensor is failing, you will see the RPM guage on the dash fall dramatically, but obviously difficult to watch while driving. You might want a look at this. http://volvospeed.com/vs_forum/index...n-with-my-car/

KBB · Jul 28th, 2009, 21:06

Crank sensors can and do fail when hot (the coil windings short internaly). High temps increase the resistance and the signal back to the ECU becomes weak. That said internal corroded cables also increace resistance under heat. To eliminate the sensor goin open circuit when hot, as soon as the miss firing starts use freeze spray on the sensor. If normal running returns replace sensor. If this test dose not give a result then volt drop test the sensor harnes back to the ECU for a high rsistance fault.

LeeTurner · Aug 1st, 2009, 18:31

Had a root around this evening to see if there was anything obvious and also to clean some of the contacts. Found this pipe going nowhere:

another view ('scuse the fingers)

I can't see anywhere obvious for it to go. Any suggestions?

In addition there's also this cable which isn't secured - the one with the orange thing and lots of tape.

charlotte001 · Aug 1st, 2009, 21:44

Quote:

Originally Posted by LeeTurner

Had a root around this evening to see if there was anything obvious and also to clean some of the contacts. Found this pipe going nowhere:

another view ('scuse the fingers)

I can't see anywhere obvious for it to go. Any suggestions?

In addition there's also this cable which isn't secured - the one with the orange thing and lots of tape.

The orange thing looks like a one way valve. The car will stutter and run horribly if this is unplugged [they appear on carburettor engines]but this one looks like it read volumetric pressure and the tape looks like its trying to seal a split another really common problem in vacuum hoses as they go stiff then tear, as for the clear pipe looks like a previous owner has tried to fix a problem with good old fashioned aquarium airline hose.

LeeTurner · Aug 1st, 2009, 22:05

Thanks for the reply. What looks like clear pipe in the first photo is actually normal black pipe - it's just the reflection from the flash. I'll trace the pipe that's attached to the valve and see if it's an easy fix. I just need to find where the pipe in the first pictures is supposed to go.

Chris_Rogers · Aug 2nd, 2009, 08:41

The unit the pipe is connected to looks like the turbo control valve, this is usually mounted to on a clip on the side of the air filter next to the MAF sensor.

In your second smaller photo you can just see a connection to the induction pipework with a white pipe (with black elbow) connected to it.

Your mystery pipe should be connected there, the white pipe belongs somewhere else.

Maybe a wider photo would help, but things don't look right with the pipework.

Any aftermarket induction parts fitted?

LeeTurner · Aug 2nd, 2009, 10:00

Thanks Chris. Just had a closer look and the third picture with the orange fitting is an electrical cable and feeds into the bulkhead.
I took a couple more pictures of the other pipe:

The unit that the pipe is plugged in to:

I found the clip on the side of the airbox and also another connection on the induction pipework. Would the pipe fix on to there?

Here's a wider view:

dooby · Aug 2nd, 2009, 21:27

Hi,

yes I believe the spare hose from your turbo control valve does connect the turbo intake pipe where your blue circle is. On my 850 the other stub on that pipe is blanked off so I don't know why yours has a rubber elbow and the white pipe coming off it - maybe someone with more knowledge on the V70s can confirm.

I also don't recognise the orange one-way valve pipework so can't help their either, sorry :-(

Cheers, Pete

Chris_Rogers · Aug 2nd, 2009, 21:54

The valve should be fitted to the side of the air filter and I think you have correctly identified the location for the 'spare' pipe.

LeeTurner · Aug 3rd, 2009, 06:29

Thanks for your help guys. Drove around 30 miles to the station this morning and I'm still getting the missing and stalling issues so it's back to the garage tomorrow. If it's not sorted after that then I'm going to have to take it to an auto electricians.

Jul 28th, 2009, 09:11	#11
ShadeTek Premier Member Last Online: Apr 20th, 2024 19:38 Join Date: Dec 2002 Location: Renfrewshire View Photos By: ShadeTek	Have the dizzy and leads been changed before or since you have had the car? It sounds like it might be in that area. If the crank sensor is failing, you will see the RPM guage on the dash fall dramatically, but obviously difficult to watch while driving. You might want a look at this. http://volvospeed.com/vs_forum/index...n-with-my-car/ __________________ Tek-Emo Villis Emo Bis V70 SE NAV 1.6 D2 2015MY POWERSHIFT, D4162T, 93000miles, RED. /VOL FCR/PEPER OBD2/Acron 9135 OBD2/L.E.D Flasher/VDASH/ANCEL BA301/Topdon Top Scan

Aug 1st, 2009, 18:31	#13
LeeTurner New Member Last Online: May 7th, 2010 10:03 Join Date: Jul 2009 Location: Lancashire	Had a root around this evening to see if there was anything obvious and also to clean some of the contacts. Found this pipe going nowhere: another view ('scuse the fingers) I can't see anywhere obvious for it to go. Any suggestions? In addition there's also this cable which isn't secured - the one with the orange thing and lots of tape. Last edited by LeeTurner; Aug 1st, 2009 at 18:36.

Aug 2nd, 2009, 21:27	#18
dooby Forum Support Team Last Online: Jul 5th, 2019 16:11 Join Date: Mar 2006 Location: Cambridge View Photos By: dooby	Hi, yes I believe the spare hose from your turbo control valve does connect the turbo intake pipe where your blue circle is. On my 850 the other stub on that pipe is blanked off so I don't know why yours has a rubber elbow and the white pipe coming off it - maybe someone with more knowledge on the V70s can confirm. I also don't recognise the orange one-way valve pipework so can't help their either, sorry :-( Cheers, Pete __________________ '97MY black 855R M56H + Quaife Porsche/S60R BBK + XP8s, TD04HL-19T, 17"x8J Pegasus, THS intercooler, custom intake & RIP, Samco coolant, Koni/Nivo H&R, S60R manifold, TT-USB, Simota, IPD turbo back, IPD anti-roll bars & droplinks, IPD HT, MSD coil, Innovate LC-1, dimming mirror, Goodridge hoses, DOT5.1, V70 rear lights & handles, poly top bush & A arms & tie bar, strut brace, clear repeaters, 6k HID, catch tank, 2x rear brace

Aug 3rd, 2009, 06:29	#20
LeeTurner New Member Last Online: May 7th, 2010 10:03 Join Date: Jul 2009 Location: Lancashire	Thanks for your help guys. Drove around 30 miles to the station this morning and I'm still getting the missing and stalling issues so it's back to the garage tomorrow. If it's not sorted after that then I'm going to have to take it to an auto electricians. Last edited by LeeTurner; Aug 3rd, 2009 at 06:34.

Jul 28th, 2009, 21:06	#12
KBB Master Tech Last Online: May 18th, 2020 10:57 Join Date: Dec 2006 Location: On Contract Dubai Automotve Technical Academy	Crank sensors can and do fail when hot (the coil windings short internaly). High temps increase the resistance and the signal back to the ECU becomes weak. That said internal corroded cables also increace resistance under heat. To eliminate the sensor goin open circuit when hot, as soon as the miss firing starts use freeze spray on the sensor. If normal running returns replace sensor. If this test dose not give a result then volt drop test the sensor harnes back to the ECU for a high rsistance fault.

Aug 1st, 2009, 22:05	#15
LeeTurner New Member Last Online: May 7th, 2010 10:03 Join Date: Jul 2009 Location: Lancashire	Thanks for the reply. What looks like clear pipe in the first photo is actually normal black pipe - it's just the reflection from the flash. I'll trace the pipe that's attached to the valve and see if it's an easy fix. I just need to find where the pipe in the first pictures is supposed to go.

Aug 2nd, 2009, 08:41	#16
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	The unit the pipe is connected to looks like the turbo control valve, this is usually mounted to on a clip on the side of the air filter next to the MAF sensor. In your second smaller photo you can just see a connection to the induction pipework with a white pipe (with black elbow) connected to it. Your mystery pipe should be connected there, the white pipe belongs somewhere else. Maybe a wider photo would help, but things don't look right with the pipework. Any aftermarket induction parts fitted?

Aug 2nd, 2009, 10:00	#17
LeeTurner New Member Last Online: May 7th, 2010 10:03 Join Date: Jul 2009 Location: Lancashire	Thanks Chris. Just had a closer look and the third picture with the orange fitting is an electrical cable and feeds into the bulkhead. I took a couple more pictures of the other pipe: The unit that the pipe is plugged in to: I found the clip on the side of the airbox and also another connection on the induction pipework. Would the pipe fix on to there? Here's a wider view:

Aug 2nd, 2009, 21:54	#19
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	The valve should be fitted to the side of the air filter and I think you have correctly identified the location for the 'spare' pipe.

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