Fuel pipe/rail query

the mk1 kid · Jun 5th, 2009, 11:40

Hi,

Please help solve a mystery for me - i'm sure its easily laid to rest by you guys!!

last night i visited a friends garage, and they had a nice 850 20v estate in black parked in the door way, and two mechanics were stood there puzzled where the 'other' fuel line entered the rail. One line ran over the rocker cover to the left, by the belts, and the other (return or feed i dont know?) was no where to be found!?

I suggested they slipped of the alloy cover that hides the pressure reg and injectors, which they did, but still no joy - it appeared to have only a feed (or return) - were we being blind/stupid!?

I tried searching for a pic of a 20v engine, and could only find similar examples, and not the exact engine (eg it was a 2.5 20v, but parts attached/near the rocker where different, so i assumed it was some variant).

I could make a call to find out the year..?

Thanks in advance!

Tom

EDIT: reason being it was running very rich, and they wanted to check the fuel pressure, vac hoses etc.

Enigma666 · Jun 5th, 2009, 12:36

If it is anything like the S40 T4 I had there was no return line.....there was the piping for it (from the NA model) but it was blocked off....hope that is of some help?

If you give me the year of the car I can check Vadis too

the mk1 kid · Jun 5th, 2009, 12:51

Quote:

Originally Posted by Enigma666

If it is anything like the S40 T4 I had there was no return line.....there was the piping for it (from the NA model) but it was blocked off....hope that is of some help?

If you give me the year of the car I can check Vadis too

Hi, and thanks!

Its a 96 car.

I've not known, or worked on cars that dont have a feed and return - is this common?

Cheers

Tom

Enigma666 · Jun 5th, 2009, 15:09

Any idea on the engine code for this car?

Juzzaman · Jun 5th, 2009, 15:53

My T5 has a return and supply to the fuel rail and both run next 2 each other in same place you have 1. Side by side.

Justin

Chris_Rogers · Jun 5th, 2009, 17:34

I think you will find it's this engine:

http://volvospeed.com/Repair/airpump1.php

Fuel return pipes were generally not fitted as far as the engine to the later cars they only went as far as the fuel filter area.

the mk1 kid · Jun 8th, 2009, 10:35

Hi, and thank you for your replies.

That is the engine for sure!

So the part we saw beneth the fuel rail couldn't have been the pressure regulator then - is that situated near the filter then?

The car runs like a bag of spanners, and as far as i know (i've not been in contact with my firend over the weekend) they were going to try a new coolant sensor (web search and mechanics general knowledge suggested that or the pressure reg could be to blame) and check the fuel pressure.

I'll get back to you when i know more..

Cheers

Tom

Jun 5th, 2009, 11:40	#1
the mk1 kid New Member Last Online: Jun 8th, 2009 10:35 Join Date: Jun 2009 Location: Somerset	Fuel pipe/rail query Hi, Please help solve a mystery for me - i'm sure its easily laid to rest by you guys!! last night i visited a friends garage, and they had a nice 850 20v estate in black parked in the door way, and two mechanics were stood there puzzled where the 'other' fuel line entered the rail. One line ran over the rocker cover to the left, by the belts, and the other (return or feed i dont know?) was no where to be found!? I suggested they slipped of the alloy cover that hides the pressure reg and injectors, which they did, but still no joy - it appeared to have only a feed (or return) - were we being blind/stupid!? I tried searching for a pic of a 20v engine, and could only find similar examples, and not the exact engine (eg it was a 2.5 20v, but parts attached/near the rocker where different, so i assumed it was some variant). I could make a call to find out the year..? Thanks in advance! Tom EDIT: reason being it was running very rich, and they wanted to check the fuel pressure, vac hoses etc.

Jun 5th, 2009, 15:53	#5
Juzzaman Senior Member Last Online: Mar 30th, 2011 23:14 Join Date: Oct 2008 Location: Sudbury	My T5 has a return and supply to the fuel rail and both run next 2 each other in same place you have 1. Side by side. Justin __________________ 1993 CBR600 FM 1996 850 T5 (Forge BOV Kit, Boost gauge @ 10psi) 2001 S60 2.0 TS

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Jun 5th, 2009, 12:36	#2
Enigma666 Master Member Last Online: Apr 16th, 2021 11:32 Join Date: Aug 2006 Location: Chester	If it is anything like the S40 T4 I had there was no return line.....there was the piping for it (from the NA model) but it was blocked off....hope that is of some help? If you give me the year of the car I can check Vadis too

Jun 5th, 2009, 15:09	#4
Enigma666 Master Member Last Online: Apr 16th, 2021 11:32 Join Date: Aug 2006 Location: Chester	Any idea on the engine code for this car?

Jun 5th, 2009, 17:34	#6
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	I think you will find it's this engine: http://volvospeed.com/Repair/airpump1.php Fuel return pipes were generally not fitted as far as the engine to the later cars they only went as far as the fuel filter area.

Jun 8th, 2009, 10:35	#7
the mk1 kid New Member Last Online: Jun 8th, 2009 10:35 Join Date: Jun 2009 Location: Somerset	Hi, and thank you for your replies. That is the engine for sure! So the part we saw beneth the fuel rail couldn't have been the pressure regulator then - is that situated near the filter then? The car runs like a bag of spanners, and as far as i know (i've not been in contact with my firend over the weekend) they were going to try a new coolant sensor (web search and mechanics general knowledge suggested that or the pressure reg could be to blame) and check the fuel pressure. I'll get back to you when i know more.. Cheers Tom

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