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2006 XC70 Hot starting issues

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

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Rvolvos
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Year and Model: 2006 xc70
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Rvolvos

Re: 2006 XC70 Hot starting issues

Post by Rvolvos » Mon May 25, 2020 11:40 am

darrylrobert wrote:
Mon May 25, 2020 4:35 am
keep us updated. defiantly issues with these cars in hot climates. i notice your VIDA has alot of parameters for the purge valve, my VIDA has none only 1 parameter for the EVAP canister close valve, which the car doesnt have. what version of VIDA do you have? 2014D?

Does your car have the little fan for the ECM, mine doesnt, the ECM gets really hot on warm days. I have one on order, i hope its not lost at sea, i plan to wire it to activate whenever the ignition is on. Ive heard of people putting computer fans in there.
Yes, it has a fan in the ecm & Tom box. Runs also a couple minutes after the car has shut down. You may want to add a shutoff delay in it too.
I am using version 2014D. What year is your car? I noticed things change per car in Vida.
2006 XC70 2.5T 190k
2006 V70 2.5T 152k
2011 C30 T5 AW55-50SN 99k
2011 C30 T5 M66 66k

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darrylrobert
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Re: 2006 XC70 Hot starting issues

Post by darrylrobert » Tue May 26, 2020 9:36 pm

My car is 2001, its winter (15-20c) here now so car starts multiple times when hot no problems so far. My next plan of attack when i get my fan will be
1.removal of the ecm clean contacts/ re tension the pins.
2.Then adding some EMF shielding to the crank sensor wires that go past the starter motor.
3. Last thing is to check remove/replace the charcoal canister.
4.set fire to car :lol:

Rvolvos
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Re: 2006 XC70 Hot starting issues

Post by Rvolvos » Sun Jun 07, 2020 9:12 pm

So far I have replaced:
Crank position sensor; error is gone
Maf sensor , stumbling is gone, but still longer cranking.
Swapped the Pem; no change.
Ignition coils replaced. No change.
Injectors replaced with a refurbished set. Better but still longer cranking then cold.

I have checked for spark when the engine is hot. I used an extra spark plug I had and a ground wire to ground the coil. It sparks after the engine has turned over a couple of times. Not sure if this is normal.

Observation rpm goes up and down during a (hot) start.

Left to do:
Reroute the wire to the starter away from crank and cam position sensor.
Bench test the purge valve.
......
2006 XC70 2.5T 190k
2006 V70 2.5T 152k
2011 C30 T5 AW55-50SN 99k
2011 C30 T5 M66 66k

Rvolvos
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Year and Model: 2006 xc70
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Rvolvos

Re: 2006 XC70 Hot starting issues

Post by Rvolvos » Sat Jun 13, 2020 7:04 pm

When cold car starts okay, tachometers goes from zero to 700rpm
Starting when hot long cranking and tachometer spikes / jumps up and Down.

Fabricated a bracket to replace the worn broken bracket at the Rh corner of Engine to keep the wires up and away from the starter. The wire harness containing the crank and cam position wires routes over and behind the starter( perpendicular to the starter) and ties in into the front wire harness. 2nd option from PGills list?
I also removed the positive lead from the wire harness away from the cam position sensor.

I did not make any difference, still long cranking and tachometer jumping up and down.

Only solution is to replace the starter with a good used one what hopefully produces less EMI.
2006 XC70 2.5T 190k
2006 V70 2.5T 152k
2011 C30 T5 AW55-50SN 99k
2011 C30 T5 M66 66k

jonesg
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Re: 2006 XC70 Hot starting issues

Post by jonesg » Mon Jun 15, 2020 12:58 am

darrylrobert wrote:
Mon May 25, 2020 4:35 am
keep us updated. defiantly issues with these cars in hot climates. i notice your VIDA has alot of parameters for the purge valve, my VIDA has none only 1 parameter for the EVAP canister close valve, which the car doesnt have. what version of VIDA do you have? 2014D?

Does your car have the little fan for the ECM, mine doesnt, the ECM gets really hot on warm days. I have one on order, i hope its not lost at sea, i plan to wire it to activate whenever the ignition is on. Ive heard of people putting computer fans in there.
If you suspect computer overheat you can try running the AC, the air for the computer box is drawn from the passenger footwell.
even when things are running properly the computer is hot to the touch.
I popped the fuse to my cooling fan and in no time it was throwing a hissy fit, codes were being set from one end of the car to the other.

Rvolvos
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Re: 2006 XC70 Hot starting issues

Post by Rvolvos » Mon Jun 29, 2020 10:32 pm

Rvolvos wrote:
Sat Jun 13, 2020 7:04 pm
When cold car starts okay, tachometers goes from zero to 700rpm
Starting when hot long cranking and tachometer spikes / jumps up and Down.

Fabricated a bracket to replace the worn broken bracket at the Rh corner of Engine to keep the wires up and away from the starter. The wire harness containing the crank and cam position wires routes over and behind the starter( perpendicular to the starter) and ties in into the front wire harness. 2nd option from PGills list?
I also removed the positive lead from the wire harness away from the cam position sensor.

I did not make any difference, still long cranking and tachometer jumping up and down.

Only solution is to replace the starter with a good used one what hopefully produces less EMI.
Edit, rerouting the the 12Volt cable to the battery made it worse. Put it back into the original position and it’s better. Still not great. The little bracket had a positive influence on the hot starting issue.

Our V70 has the same broken bracket but does not experience hot starting issues, which makes me think it is starter related.
2006 XC70 2.5T 190k
2006 V70 2.5T 152k
2011 C30 T5 AW55-50SN 99k
2011 C30 T5 M66 66k

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- Pete -
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Re: 2006 XC70 Hot starting issues

Post by - Pete - » Mon Jun 29, 2020 11:08 pm

On a lark, have you removed the ECM/TCM and cleaned the contacts? Obviously you don’t physically touch any of the pins/petals, cleaning is done with a spray. I recently overcame a several-month mogul by cleaning the contacts & lubing with sprayable dielectric grease.
2001 V70XC 146k
2004 V70 AWD 141k
2004 V70R M66 144k
2004 XC70 287k
2006 XC70 155k Sold

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Re: 2006 XC70 Hot starting issues

Post by jonesg » Tue Jun 30, 2020 1:56 am

Rvolvos wrote:
Sun Jun 07, 2020 9:12 pm

I have checked for spark when the engine is hot. I used an extra spark plug I had and a ground wire to ground the coil. It sparks after the engine has turned over a couple of times. Not sure if this is normal.


......
To me that explains why it hard starts, no spark no run.
It might be worse on other sparkplugs too.

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