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New to me 850 turbo sedan 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
dfellows77
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dfellows77

New to me 850 turbo sedan

Post by dfellows77 » Fri Mar 01, 2019 7:51 am

Hello...
First time on this site. Thank you in advance.
I bought a used 1995 Volvo 850 turbo (2.3L turbo) I test drove it and it seemed really solid, started right up in the 15 degree air and drove surprisingly well for its age. No hesitation, no issues that were glaring. It has 200k Miles and was a one owner who had a huge list of maintenance done for the last 20 years. This guy had put another 20k back into this car over the years. I had about a 100 mile drive to get it home which was amazing till about 50 miles in when I noticed a little loss in power. I got off an exit and the car seemed to struggle to idle ... it didn't die but it struggled and has ever since. It starts, it runs but under load it shakes terribly in the front end... dash sounds like it will shake off. Once up to speed and cruising, there isn't an issue. I have changed the thermostat which was the one small issue I noticed and fixed the temp gauge. I have since had a tune up, new coil pack, and new motor mounts. Gas milage is a bit better but still the shaking in idle and getting up to speed. performance seems to be down as well... any ideas????



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Ocelot
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Ocelot

Re: New to me 850 turbo sedan

Post by Ocelot » Fri Mar 01, 2019 8:43 am

English isn't my native language, when you mention that you had a tune-up, did you also replace new plugs, cap and rotor? And I would certainly check for vacuum leaks (see youtube clip below).

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Deus semper maior

Recent car
'98 Volvo S70 2.5 10V Europa edition (Freya)
Previous owned Volvo's
'96 Volvo 440 Si 1.8
'87 Volvo 340 GL 1.7
'85 Volvo 340 DL 1.4

dfellows77
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dfellows77

Re: New to me 850 turbo sedan

Post by dfellows77 » Fri Mar 01, 2019 8:47 am

yes a full tune up! plugs, wires, etc. I haven't checked the hoses. I will check this video out thank you!



dfellows77
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dfellows77

Re: New to me 850 turbo sedan

Post by dfellows77 » Fri Mar 01, 2019 9:46 am

ok... no vacuum leaks, injectors maybe?



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WhatAmIDoing
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Re: New to me 850 turbo sedan

Post by WhatAmIDoing » Fri Mar 01, 2019 9:52 am

More likely the fuel pump or fuel pump relay than injectors. Get a cheap tire gauge (will be destroyed unless you have a fuel pressure gauge) and check fuel pressure at the schrader valve after prime (before start), then at idle and report back.
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'98 S70 T5M - 270,000+mi
Knows enough to be dangerous :wink:

dfellows77
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dfellows77

Re: New to me 850 turbo sedan

Post by dfellows77 » Fri Mar 01, 2019 10:03 am

will do...thanks



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Re: New to me 850 turbo sedan

Post by GlennG2759 » Fri Mar 01, 2019 11:35 am

Fuel filter ?



dfellows77
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dfellows77

Re: New to me 850 turbo sedan

Post by dfellows77 » Fri Mar 01, 2019 12:02 pm

haven't done anything with the fuel filter, pump or relay



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Clemens
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Re: New to me 850 turbo sedan

Post by Clemens » Fri Mar 01, 2019 2:22 pm

fuel filter is a good guess.


Summer: 1996 855 R
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erikv11
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Re: New to me 850 turbo sedan

Post by erikv11 » Fri Mar 01, 2019 5:33 pm

Agree with all the comments so far. Jumper the fuel pump relay with a wire or paper clip. The symptoms will go away immediately if the relay is the problem.

If fuel supply seems to check out, consider cleaning the IAC (Idle Air Control) valve.

Any codes or CEL?


'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 140k
'98 S70 NA, 205k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 275k
'06 S60 R, 155k
gone: '96 NA 850 210k, '98 NA V70 182k

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