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  #1  
Old 01-08-2014, 12:35 PM
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Default 99 v70 fuel pressure

What should the fuel pressure be, at the schrader valve on the fuel rail of my Base '99 V70?


Thanks!
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  #2  
Old 01-08-2014, 12:48 PM
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41-45 psi for a non turbo, 54-57 for a turbo
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Old 01-08-2014, 01:05 PM
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Thank you!

Mine is a non-turbo.

Also, what should it be with the car not running and the key on - or doesn't that really matter?
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Old 01-08-2014, 02:00 PM
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Just ran my pressure tester.

When I turn on the key, with no engine, I get about 10 psi.

When I start the engine, I'm running a consistent 24 psi.

Obviously this is far too little pressure.

So here are my next questions:
1. Is there a fuel pressure regulator on this car? It has only 1 line running to the fuel rail, and there is a fuel damper on the fuel rail. But that damper is NOT a regulator, is it?

2. Is the culprit likely my fuel pump?

3. Could this low fuel rail pressure be causing me to have a P0171 Code coming up (lean bank 1)?
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Old 01-08-2014, 04:29 PM
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1-No, the pump regulates the pressure.

2- Yes, but a clogged fuel filter can cause this as well.

3- Yes. Lean can be too much air or not enough fuel.
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Old 01-08-2014, 04:40 PM
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Quote:
Originally Posted by ES6T View Post
1-No, the pump regulates the pressure.

2- Yes, but a clogged fuel filter can cause this as well.

3- Yes. Lean can be too much air or not enough fuel.
Thank you for your response!

I did change the fuel filter this summer - about 2500 miles ago - so, considering the size of that bugger, I seriously doubt that there's a problem with it.

Also, it is common for the fuel pump in these Volvos to be working, but not producing the pressure it should?


If I do (and it sounds like I will) replace the pump, do you have any suggestions regarding brand, part number, etc.?
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Old 01-08-2014, 09:39 PM
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Yeah if the filter has been changed, that's not your problem.

I wouldn't say common, but yes, I have seen a few with this problem.

I'm a dealer tech, so I only have experience with OEM parts. I couldn't give you an honest review of any aftermarket ones.
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Old 01-08-2014, 10:00 PM
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I"m running an E8643 from Autozone. Same one would fit your car too. It was actually a Walbro pump in an Airtex box. Runs great and more than enough for a stock engine. I chose it as it should be enough form my car when I go to a bigger turbo and ARD tune. Already running bigger injectors and E85 mix. Autozone or Oreilly about 130 and 1 yr warranty.
I would also check out FCP to see if theirs would have a lifetime warranty if installed by an ASE tech and you were going to be hanging on to yours for a while.

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Old 01-09-2014, 07:04 AM
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Thank you, Kiss4aFrog!

I know these Volvos can be extremely fussy about replacement parts, so I've assumed that the lower priced fuel pumps should probably be avoided.

I get a lot of parts from RockAuto, and the pump you linked is right at $100 through them. That's a LOT better to think about than $500+ for a Volvo pump!
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  #10  
Old 01-09-2014, 11:32 AM
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Just ordered the AirTex E8643 from RockAuto. Total, with shipping, is right at $105. Strainer included. And it comes with a limited lifetime warranty - so that puts my mind at ease.

Thank you!
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Old 01-09-2014, 11:32 AM
 
 
 
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Tags
70, 99, bank, clogged, filter, fuel, low, pressure, s70, symptoms, v70, volvo


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