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Hose off air cleaner lid Topic is solved

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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Hose off air cleaner lid

Post by darklymanner » Thu Nov 21, 2019 2:57 pm

Hi my name is john. New here. I just bought a 98 s70 and it's chugging out when we get up to 50 mpg or so. Gonna do a fuel filter and pump tomorrow but trying to run through other stuff. There is a broke hose coming off the air cleaner going down the front of the engine and then under and I cant find reference to this anywhere. Doesnt even exist in most pictures of same engine. New with volvos any help would be appreciated. Thank you



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Re: Hose off air cleaner lid

Post by JimBee » Thu Nov 21, 2019 4:06 pm

Any leaks in the intake air and vacuum systems will cause erratic engine operation. Small ones in vacuum lines are a common problem on the p80's.

I've had a couple of issues with the accordion hose from the filter box to the intake—one was a tear on the back side so I didn't see it immediately and thought I had a fuel pump failure or blocked fuel filter. The other was a loose hose clamp at the filter box—that one caused the engine to flail all over, could barely keep it running to get home.



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Re: Hose off air cleaner lid  Topic is solved

Post by volvolugnut » Thu Nov 21, 2019 4:28 pm

I think it is more likely you have an air intake leak than a fuel pump failure. The filter change is just good routine maintenance and I would do this on a newly acquired vehicle. As JimBee said, look for leaks in the air hose from mass air flow meter and any of the many vacuum lines. Unmeasured air into the engine will not be matched with measured fuel to the injectors and the engine will starve.

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2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple parts cars.

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Re: Hose off air cleaner lid

Post by erikv11 » Thu Nov 21, 2019 5:33 pm

Re-attach and/or replace all of the vacuum lines. Here are the comprehensive threads about vacuum lines for your S70:

turbo car - viewtopic.php?t=63615
non-turbo car - viewtopic.php?f=1&t=65002

The non-turbo one has better detail about lines off the air box.

If the hose you are talking about doesn't seem to be covered there, post up a pic we can help.


'95 854 T5-R, Motronic 4.4, 185k
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'98 V70, T5 tune-injectors-turbo, LPT engine, 280k
'06 S60 R, 160k
gone: '96 NA 850 210k, '98 NA V70 182k

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Re: Hose off air cleaner lid

Post by abscate » Thu Nov 21, 2019 5:44 pm

Unmeasured air into the engine will not be matched with measured fuel to the injectors and the engine will starve.
I always have to write a paragraph to explain this, and this sentence does it beautifully.

+1000 points

:D :D :D


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Re: Hose off air cleaner lid

Post by volvolugnut » Fri Nov 22, 2019 10:19 am

abscate wrote:
Thu Nov 21, 2019 5:44 pm

I always have to write a paragraph to explain this, and this sentence does it beautifully.

+1000 points
Thankyou, thankyou very much.

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Re: Hose off air cleaner lid

Post by volvolugnut » Fri Nov 22, 2019 10:20 am

Guess I just lost all my points for a scrambled quote. Sigh.

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Re: Hose off air cleaner lid

Post by darklymanner » Thu Nov 28, 2019 8:06 pm

I replaced the fuel filter and the problem calmed down. Now I'm faced with a key that wont turn and and a hypothetical cylinder lock replacement. I have replacement hoses in my cart but I'm waiting to get paid. I really like this car but frustrations are compiling.. thank you to all who replied I appreciate your time and unput



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Re: Hose off air cleaner lid

Post by abscate » Fri Nov 29, 2019 1:43 am

volvolugnut wrote:
Fri Nov 22, 2019 10:20 am
Guess I just lost all my points for a scrambled quote. Sigh.

volvolugnut
Points given!

John, on a tight budget, you have to move slowly on the diagnostic path , and not guess at parts replacement. Volvo parts are high quality and expensive as many last 300k miles or more.

Engine Focus areas on a newly acquired 1998

Cap rotor plugs and plug wires
PCV system
Cooling group
Vacuum hoses..all of them


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