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'97 850R Stalling Issue

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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Jough
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Joined: Mon Aug 04, 2014 5:49 pm
Year and Model: 1997 850 R
Location: Portland

'97 850R Stalling Issue

Post by Jough »

Thought I would try running this past the collective wisdom of MVS before I say uncle and get a tow to a shop.

My '97 950R is stalling if I don't keep the RPMs around 1200 or higher. I also have to give it gas when starting or it barely shows any signs of combustion. If I do keep my foot on the gas and keep the idle up, it runs just dandy. Doesn't throw any codes.

I did a quick check for loose or damaged vacuum lines and everything seems ok initially (I actually just checked and replaced almost all of them last summer). As I'm typing this, I realize I didn't check the ones that run to the canister, so I may do that later. I also tried swapping out the MAF with another that I was good when I last tried it, and there was no effect. No effect when running with the MAF unplugged, either (well, save for throwing a low MAF voltage code... so I guess I lied - it will throw that one code, but I assume I know why! :lol:)

Any ideas? Fuel pressure regulator? Or TPS maybe?

Thanks in advance. :)
scot850
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Re: '97 850R Stalling Issue

Post by scot850 »

Check the fuel pump relay in the fuse box rear section under the hood. There are threads on her to tell you how to fit a jumper wire to bypass it for testing purposes. If it turns out to be that, then use a Volvo only part and not a KAE unless you want the problem back. Even a junkyard one should be good enough to compare.

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
Jough
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Joined: Mon Aug 04, 2014 5:49 pm
Year and Model: 1997 850 R
Location: Portland

Re: '97 850R Stalling Issue

Post by Jough »

Thanks for the suggestion. I could hear the fuel pump priming when I turned the key, but I jumped it anyway to test. Didn't have an effect. :(
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FLXC90
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Re: '97 850R Stalling Issue

Post by FLXC90 »

Fuel filter?
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)
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Re: '97 850R Stalling Issue

Post by abscate »

Pull apart the idle Air control valve and see how dirty it is.

You need To remove all vacuum lines to check for breaks, this bit me last month.

Throttle body clean?

What are age on plugs, wires, cap, rotor?
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Re: '97 850R Stalling Issue

Post by erikv11 »

This symptom is usually caused by a vacuum leak. Dirty IAC is a good thought. Did you check the PITA hose to the vacuum nipple on the intake manifold passenger side? But that usually gives a p0172. Try the starting fluid trick to ID vacuum leaks, including around the intake manifold.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 293k
'06 S60 R, 167k
'07 XC70, 170k
'99 Camry V6 :shock: 130k
gone: '96 NA 850 210k, '98 NA V70 182k
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