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High Idle and P0505 after cold air intake install

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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MadeinSweden1
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Year and Model: 1998 V70 M
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MadeinSweden1

Re: High Idle and P0505 after cold air intake install

Post by MadeinSweden1 » Thu Jun 25, 2020 12:13 pm

Yes we are referring to the SAS pump hose, located on the top of the air box cover. I think it was the way I explained it that was confusing.

I located a delete for the SAS here, what do you guys think? I don't see a good way to hook up this SAS pump hose anywhere before MAF so it is probably best to delete. viewtopic.php?f=1&t=31536
1998 V70 Manual- - K & N Cold Air Intake, 960 TB Plate, IPD Lowering Springs (f/r), Koni STR.T Struts, Koni STR.T Shocks, 225/45/17's, Front Strut Brace, Rear Shock Brace, Ferrita Cat-Back Exhaust, Magnaflow Cat, HD Control Arms, IPD Subframe Inserts, IPD top engine mount bushing & IPD Firewall bushing, IPD Sway Bars Front and Rear, Mobil 1-Full Synthetic, Full Restore

scot850
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Re: High Idle and P0505 after cold air intake install

Post by scot850 » Thu Jun 25, 2020 11:21 pm

Sorry to be negative, but why do owners replace the standard air box with the can? It totally defeats any potential improvements as it only draws from hot air under the hood.

Remove the K&N filter and re-fit the original air-box. The fit a K&N version of the OE style air filter if you want to have one.

Neil.
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

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misha
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Re: High Idle and P0505 after cold air intake install

Post by misha » Fri Jun 26, 2020 1:23 am

I agree with scot850.
I must ad that K&N filters are nothing but trouble.
Oil film from them usually mess up Maf sensor readings and makes more problems than benefits.
'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

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MadeinSweden1
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Re: High Idle and P0505 after cold air intake install

Post by MadeinSweden1 » Fri Jun 26, 2020 7:08 am

Thank you for your opinions, but my original post was NOT how to reinstall the stock air box housing unit. I knew I was going to get some users who were skeptical of this and try to resolve it by saying "why don't you take it off". Say what you want but this car has been my daily driver for 8 years and I immediately had more power in the high rev range.

Do not douse your air filter in spray, that will prevent all the additional accumulation of oil from messing with the MAF. Unless you are driving in the Mojave desert, I am not too worried about "hot" air. I drove yesterday in 90 degrees F and the air intake provided an abundance of fresh air. I would be more worried about the restrictive snow cover that is found in stock. That prevents the flow of air. Besides; how hot does it get in Alberta Canada that you worry about "hot air"? lmao
Additional airflow in a naturally aspirated engine will make a small impact in performance. Is it worth the additional effort is the real question? To most, no, to me, yes. All the haters can stop being negative and just accept that some people do things differently.
if you are so inclined
1998 V70 Manual- - K & N Cold Air Intake, 960 TB Plate, IPD Lowering Springs (f/r), Koni STR.T Struts, Koni STR.T Shocks, 225/45/17's, Front Strut Brace, Rear Shock Brace, Ferrita Cat-Back Exhaust, Magnaflow Cat, HD Control Arms, IPD Subframe Inserts, IPD top engine mount bushing & IPD Firewall bushing, IPD Sway Bars Front and Rear, Mobil 1-Full Synthetic, Full Restore

scot850
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scot850

Re: High Idle and P0505 after cold air intake install

Post by scot850 » Fri Jun 26, 2020 1:33 pm

While not trying to get personal with this, I am unable to see how feeding air from a hot area under the hood (and yes I see the original air intake pipe is still there) helps improve performance. The standard proven view is feeding more cold air to an engine to compress the air/fuel charge to get more power. Why do racing cars have huge cold air intakes to feed the engine?

As to temperature in Alberta. Can go below -40C in winter and above +35C in summer where I live. Still would not use a air intake like you have. I run a V70R with 312 bhp and 300 ft/lb from a tune and standard turbo air box.

I have seen a similar intake to yours but with an air-box around it being fed with a large cold air tube from the front of the car. Now that makes sense.

Neil.
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

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callahanoffroad
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callahanoffroad

Re: High Idle and P0505 after cold air intake install

Post by callahanoffroad » Sat Jun 27, 2020 5:10 am

Good info on here 👍

To the OP: this is what scot850(Neil) is referencing: https://www.ipdusa.com/products/4670/11 ... 5sEALw_wcB

The stock intake on an 850 IS a cold air intake system. What you've created is typically referred to as a short ram, sans the ram air effect. I know because I used to build Honda's, and Subarus in the mid 2000's. Those cone filters are neat bc they lower throttle response when you shorten the intake system. I'd just carry a can of MAF spray with you just in case. No starts from dirty MAF's are a pain in the bootay. Trust me I know.

As far as the SAS delete, if you can grab a spare ECU JUST IN CASE. I've never done it as the general consensus in the kingdom of volvodom is that NA engines are not worth trying to get anything extra out of. But I'm all for modifying cars so go for it. While you're at it, switch out that throttle plate for a 960 throttle plate, upgrade to a 2.5" outlet header and exhaust, then please please please go get it Dyno tested. I'm dying to see a non turbo Dyno sheet. Then you can show it to the "haters" and have hard data not perceptions to prove them wrong. Volvo people are logical by nature so bring them the data and they'll believe you. :-)

I miss my old manual wagon. So I'm a little jealous. :-)

-Ryan
Author, Chef, and Shade Tree Mechanic

1995 Volvo 850, Non-Turbo, VVIS, LH FI, Green, 215,000 miles. B5254FS engine. Herman. viewtopic.php?f=1&t=84393

1996 Volvo 850, died at 280,000

Founder of: CookingForChemo.Org

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