S/V/C ground straps p2 V70

Janspeed · 08-21-2012, 03:46 AM

how many groundstraps are there supposed to be between engine and body of a p2 V70?
i can only locate one small one: from valvecover to bulkhead. Is that the only one?

CEHepp · 08-21-2012, 06:34 AM

There is a huge one that goes from the transaxle to the frame.

Getting RPM sensor DTC's?

Janspeed · 08-21-2012, 06:50 AM

Thanks! I will have a look at that big ground cable as well.

actually the display shows all kinds of weird errors like DSTC service needed, weird varying idle speed, CEL on, cam adjuster error, weird throttle response. Sometimes when i switch the engine off and restart again all errors are gone. weird . I hate inconsistent errors.

Yesterday i took the ground cable of the battery, hooked up a jumper cable between valvecover bolt and a struttbolt, then re-attached the ground cable. Start engine: All errors gone! ??? I'm confused.
I took the car for a drive, stopping and restarting the car a few times. Errors stayed away.
So i hope this poor grounding of the engine is what causes the problems

I know that this engine that is in the car is the 2nd engine so i can no longer know/trust that all is still factory spec.
Hence my question.

Janspeed · 08-22-2012, 07:52 AM

Yesterday i pulled the groundcable between valvecover and firewall. There was lots of corrosion on the valvecover side.
I also used:

to ensure reliable ground contacts.
When i took the groundcable off these washers were not present.

is this level of detail necessary? i think it is worth it. With only 12V available, a small increase in Ohm's in a ground connection can cause trouble, specially in modern cars that use a system that consists of a bazillion electronic parts.

TrickMick · 08-22-2012, 08:24 AM

WELL worth the read:
http://aimpartsonline.com/reduce%20warranties

Janspeed · 08-22-2012, 08:54 AM

that is a good article!
Thnx!

pilicer · 08-22-2012, 09:26 PM

Quote:

Originally Posted by TrickMick

WELL worth the read:
http://aimpartsonline.com/reduce%20warranties

This is a great, clear, simple "treat!
Thank you

kenneth rigney · 08-22-2012, 10:32 PM

bad grounds can really mess things up, and make you feel stupid when you pay a shop to solve the problem.

08-21-2012, 03:46 AM	#1
Janspeed Board Member Join Date: Sep 2005 Location: Netherlands	ground straps p2 V70 how many groundstraps are there supposed to be between engine and body of a p2 V70? i can only locate one small one: from valvecover to bulkhead. Is that the only one? __________________ DD: Volvo V70-T5-LPi geartronic, my2001\|BMW e9\| Kawasaki ZR1100 Zephyr

08-22-2012, 07:52 AM	#4
Janspeed Board Member Join Date: Sep 2005 Location: Netherlands	Yesterday i pulled the groundcable between valvecover and firewall. There was lots of corrosion on the valvecover side. I also used: to ensure reliable ground contacts. When i took the groundcable off these washers were not present. is this level of detail necessary? i think it is worth it. With only 12V available, a small increase in Ohm's in a ground connection can cause trouble, specially in modern cars that use a system that consists of a bazillion electronic parts. Last edited by Janspeed; 08-22-2012 at 07:58 AM..

08-22-2012, 08:24 AM	#5
TrickMick Board Member Join Date: Jan 2011 Location: norte carolina	WELL worth the read: http://aimpartsonline.com/reduce%20warranties __________________ In a closed society where everybody’s guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity.

08-22-2012, 10:32 PM	#8
kenneth rigney Board Member Join Date: Dec 2003 Location: Vancouver WA	bad grounds can really mess things up, and make you feel stupid when you pay a shop to solve the problem. __________________ Is that a leaky AW70 tailshaft seal in your panties or is it just that time of the month?

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08-21-2012, 06:50 AM	#3
Janspeed Board Member Join Date: Sep 2005 Location: Netherlands	Thanks! I will have a look at that big ground cable as well. actually the display shows all kinds of weird errors like DSTC service needed, weird varying idle speed, CEL on, cam adjuster error, weird throttle response. Sometimes when i switch the engine off and restart again all errors are gone. weird . I hate inconsistent errors. Yesterday i took the ground cable of the battery, hooked up a jumper cable between valvecover bolt and a struttbolt, then re-attached the ground cable. Start engine: All errors gone! ??? I'm confused. I took the car for a drive, stopping and restarting the car a few times. Errors stayed away. So i hope this poor grounding of the engine is what causes the problems I know that this engine that is in the car is the 2nd engine so i can no longer know/trust that all is still factory spec. Hence my question.

08-22-2012, 08:54 AM	#6
Janspeed Board Member Join Date: Sep 2005 Location: Netherlands	that is a good article! Thnx!