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99 V70 R rough idle after warm up and stalls

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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kklepack
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Year and Model: 1999 V70R
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kklepack

Re: 99 V70 R rough idle after warm up and stalls

Post by kklepack » Sat May 09, 2020 7:18 am

TheOtherside wrote:
Fri May 08, 2020 7:20 pm
After almost 10 months of dealing with this issue, I got a "free" OEM MAF and fuel pump relay from the local junk yard.

Fixed it a few days ago in 2 seconds.

Thanks for suggestion, but I did swap them as well and same symptoms.

TheOtherside
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Re: 99 V70 R rough idle after warm up and stalls

Post by TheOtherside » Sat May 09, 2020 1:39 pm

Best of luck! You sure that relay was good too? Lol.
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kklepack
98 V70R
13 Flex w/EcoBoost

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abscate
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abscate

Re: 99 V70 R rough idle after warm up and stalls

Post by abscate » Sun May 10, 2020 5:17 am

kklepack wrote:
Sat May 09, 2020 7:18 am
TheOtherside wrote:
Fri May 08, 2020 7:20 pm
After almost 10 months of dealing with this issue, I got a "free" OEM MAF and fuel pump relay from the local junk yard.

Fixed it a few days ago in 2 seconds.

Thanks for suggestion, but I did swap them as well and same symptoms.
You also did this
. I also disconnected MAF sensor and no improvement. I
That doesn’t tell you anything about the MAFbut does tell you that there are other problems.
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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kklepack
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Year and Model: 1999 V70R
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kklepack

Re: 99 V70 R rough idle after warm up and stalls

Post by kklepack » Sun May 10, 2020 10:09 am

So, I found someones suggestion to :
a. disconnect battery
b. fully charge it
c. connect it back
d. put the key in ON position for 10 mins, but do not start the car

After doing so, car started fine with perfect idle for 30 min or so, then I took it for a short 1 mile drive around the area (as car has not been registered so did not want to take it for longer ride) and car ran fine.

Today, I went to start the can and it is back to rough Idle and staling. WTF!!!! I wonder if something needs to be reprogramed/software update?

I guess, I'm giving up for now. Next step is to get it registered (have to wait for State to open the registration facilities) and take it to Volvo shop around me.

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abscate
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Re: 99 V70 R rough idle after warm up and stalls

Post by abscate » Mon May 11, 2020 7:32 am

If the battery is weak that will cause problems with ME7 (Your engine management software)

Whats the history on the battery? Use google to encode the date codes on it if you haven't replaced it or don't have history.
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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kklepack
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kklepack

Re: 99 V70 R rough idle after warm up and stalls

Post by kklepack » Mon May 11, 2020 8:50 am

abscate wrote:
Mon May 11, 2020 7:32 am
If the battery is weak that will cause problems with ME7 (Your engine management software)

Whats the history on the battery? Use google to encode the date codes on it if you haven't replaced it or don't have history.
It is OEM Volvo battery and I can not find dates on it, I took the battery to O'Reilly auto and they said battery is good. I get 13.40 volts with voltmeter in battery posts.

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abscate
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abscate

Re: 99 V70 R rough idle after warm up and stalls

Post by abscate » Mon May 11, 2020 10:34 am

Dont forget to put your zip into HELP IN YOUR AREA forum if you want to try get someone local to give a hand.

Whats the battery voltage with the car off after overnight?
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Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
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Link To Volvo Glossary

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kklepack
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kklepack

Re: 99 V70 R rough idle after warm up and stalls

Post by kklepack » Mon May 11, 2020 12:57 pm

Just checked and battery shows 12.53 voltage.

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