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kklepack

99 V70 R rough idle after warm up and stalls

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Work on PCV  completed and vacuum replaced with silicon and same symptoms. Time to reach-out for help to Volvo special shop in Chicago area called Swedish Car Specialists.

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On 2/21/2020 at 2:51 PM, Tonyfr said:

With the stalling and hesitation, did you check your fuel pump relay?

Yes, I did replace with the one from junkyard and swapped with  with a jumper cable and same symptoms. I will try to stop by Auto Zone and rent fuel pressure tester and report back.

Edited by kklepack

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Well went to Auto zone and the one they rent did not have the correct adapter. Bummer. Will have to try another one. Also I ordered a new spark plugs and will swap them this weekend.

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Little update: Car runs the same as before no improvement after changing below components and I still do not get any codes with VIDA.

I did compression test one more time and results are a lot better. Believe prevues gage was bad.
C1-155
C2-160
C3-160
C4-160
C5-160

New spark plugs NGK Spark Plug - NGK 6962
I did new PCV job with new blue box parts.
Replaced serpentine belt and idler.
Also replaced all vacuum lines with silicone ones and did cigar smoke test. I saw little smoke coming out of PTC nipple on the intake tube to the turbo. Also when I removed oil filler cap and dipstick smoke came out of there as well.
I did not find any other leaks anywhere else, but I hear hissing noise around by intake manifold by cylinder one where banjo bolt is and PCV (no coolant leaks)

swapped ETM with yellow label one and same symptoms. Can idled fine for 13 minutes and then rough idle and dies. 


Still have to do fuel pressure test. Went to rent fuel tester from AutoZone and it did not have right connectors.

Running out of ideas. I'm ready to take it to Swedish Car Specialists - Chicagoland's Best Volvo Service and have them look at it.

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So yesterday I started the car and ran fine for like 20 minutes. I took it out of the garage and died, so I put it back in. I did fuel test and seems like fuel pump is not keeping the pressure when car is turned off, but it is fine if car is running, I may install Fuel Line Check Valve on the fuel filter to  keep the pressure on fuel rail.

Car running

running.png

Car not running.

not running.png

Edited by kklepack

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The car should maintain 3 bar for at least 20 minutes after engine shut off. The one way check valve in your fuel pump has failed.

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I have seen people drive with a leaking check valve for years. You will still experience the hard start unless you fix it. I have not personally done this, but I know you can splice a check valve into the fuel line. Might be worth looking into.

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