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Volvo S70 not starting - Hissing sound near fuel filter

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

Klausc
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Re: Volvo S70 not starting - Hissing sound near fuel filter

Post by Klausc » Wed Feb 06, 2019 8:53 am

If the gas is flowing back to the tank rapidly, then at your next start attempt: turn the key to position II and listen for the fuel pump. When the fuel pump stops, move the key back to O, then forward to pos II again. Do this one more time and you should have fuel and pressure, enough to start the engine. If it starts, let it run for at least 5 minutes to get oil to the rings.

The valve that lets excess fuel flow to the tank is part of the fuel pump. If defective and always open, you should see a drop to zero pressure immediately after engine shut down. If it takes 30-60 seconds, it probably is the FPR that is bad. There are 2 vacuum lines on the FPR in 1998, check them both for gasoline. The easiest one to check is the hard line that connects to the front of the intake manifold.
Klaus
If I had a larger garage, I could have more Volvos.

HobbesMRH
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Re: Volvo S70 not starting - Hissing sound near fuel filter

Post by HobbesMRH » Wed Feb 06, 2019 4:11 pm

When I got home from work today I gave it a few cranks and no start. I was looking into the cam position sensor today so I went to look at mine. I unplugged it and plugged it back in. I also unplugged/plugged back in the MAF and coil and air pump relay in the main fuse box. I went to start the car and it came back to life gradually after a handful of cranks. The temp gauge read about halfway to fully warm immediately after starting.

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misha
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Re: Volvo S70 not starting - Hissing sound near fuel filter

Post by misha » Wed Feb 06, 2019 4:47 pm

HobbesMRH wrote:
Wed Feb 06, 2019 4:11 pm
The temp gauge read about halfway to fully warm immediately after starting.
ECT is bad...OR it's connector.
When it comes to ECT for these cars,it MUST be oem or at least Vernet.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

HobbesMRH
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HobbesMRH

Re: Volvo S70 not starting - Hissing sound near fuel filter

Post by HobbesMRH » Wed Feb 06, 2019 4:58 pm


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misha
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Re: Volvo S70 not starting - Hissing sound near fuel filter

Post by misha » Wed Feb 06, 2019 5:18 pm

No...NOT Fae...it's bad aftermarket.
You need OE Volvo ECT or at least Vernet brand.
Before you throw your money for a new one...check ECT connector for corosion or bad contacts.

This is what you need...1st one or 2nd one:
https://www.fcpeuro.com/products?utf8=% ... ds=9186486
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

Klausc
Posts: 788
Joined: Wed Oct 11, 2006 2:52 pm
Year and Model: 1995 855 Turbo
Location: Shorewood, MN
Has thanked: 4 times
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United States of America
Klausc

Re: Volvo S70 not starting - Hissing sound near fuel filter

Post by Klausc » Wed Feb 06, 2019 6:19 pm

Klaus
If I had a larger garage, I could have more Volvos.

HobbesMRH
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Year and Model: 98 S70
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HobbesMRH

Re: Volvo S70 not starting - Hissing sound near fuel filter

Post by HobbesMRH » Wed Feb 06, 2019 6:27 pm

Thanks guys. I wonder if my local Volvo dealership has one?

Chuck W
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Re: Volvo S70 not starting - Hissing sound near fuel filter

Post by Chuck W » Wed Feb 06, 2019 6:37 pm

misha wrote:
Wed Feb 06, 2019 4:47 pm
HobbesMRH wrote:
Wed Feb 06, 2019 4:11 pm
The temp gauge read about halfway to fully warm immediately after starting.
ECT is bad...OR it's connector.
When it comes to ECT for these cars,it MUST be oem or at least Vernet.
After my recent experience with my '97 I was going to suggest this.

Try unplugging the ECT and checking the connector for corrosion before buying a new one.

Klausc
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Klausc

Re: Volvo S70 not starting - Hissing sound near fuel filter

Post by Klausc » Wed Feb 06, 2019 6:42 pm

If not Tasca has one for $45 + shipping.
Klaus
If I had a larger garage, I could have more Volvos.

HobbesMRH
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HobbesMRH

Re: Volvo S70 not starting - Hissing sound near fuel filter

Post by HobbesMRH » Wed Feb 06, 2019 6:52 pm

There's no corrosion on the current sensor. It's relatively new.

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