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Any good 850 techs out there? Got a challenge for you

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

Pumpkinmikey
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Pumpkinmikey

Any good 850 techs out there? Got a challenge for you

Post by Pumpkinmikey » Sat Jun 15, 2019 12:07 pm

Hello folks newbie to site so admin send me off ifn wrong page. Have an 96 850 with 200k with fuel injection Problems. I am a good tech.but has me frustrated..crank no start.no codes plugs wet.found intake gskt #1 blown out.replaced. 3 other vacuum leaks fixed.boot new.all tune up parts.timing of belt ok. Got it running by feathering throttle..smoked out neighborhood..bluish white..cleared up ran like a scalded dog.shut it off started right up..NEXT DAY crank no start plugs wet...have checked for dripping inj.and has pretty spark at plug...to quote the beales HELP



Pumpkinmikey
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Pumpkinmikey

Re: Any good 850 techs out there? Got a challenge for you

Post by Pumpkinmikey » Sat Jun 15, 2019 12:12 pm

Also checked regulator and replaced maf .temp sensor shows on scanner 72.



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wizechatmgr
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wizechatmgr

Re: Any good 850 techs out there? Got a challenge for you

Post by wizechatmgr » Sat Jun 15, 2019 1:10 pm

I'm guessing a fuel/air mixture issue - possible massive vac. leak on intake manifold? IAC connected & need cleaning?

What are your pressures after the headgasket replacement? What is the pressure on the fuel rail at this point? Are you 110% sure your timing is spot on, and hasn't jumped?


Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD - ~177k miles

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wizechatmgr
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Re: Any good 850 techs out there? Got a challenge for you

Post by wizechatmgr » Sat Jun 15, 2019 1:14 pm

Is that a Volvo/Bosch MAF or a generic? The Volvo's have a very bad history of not liking aftermarket parts on the MAF.


Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD - ~177k miles

scot850
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Re: Any good 850 techs out there? Got a challenge for you

Post by scot850 » Sat Jun 15, 2019 3:54 pm

A couple of suggestions for you just to help eliminate a few possible issues other than what the guys have suggested.

Sounds like you have a spark (I'm assuming you have verified it at the plug end of the plug lead or spark-plug).

1) Pull the engine oil dipstick and smell the oil to see if it has a strong gasoline odor. If so it could be injectors leaking.
2) Check for loose injectors. Many don't check the 'O' ring seals which if never replaced will have probably failed by now.
3) Appreciate you have maybe not been able to get the car up to temperature, but check the coolant temp sensor. There is a range of resistances at various ambient temperatures it should operate at. Also check it's connector at the power steering pump, again a know age related issue of falling apart.
4) What brand of parts have you used for the ignition parts? As the guys suggested there is a long history of aftermarket (non OEM) parts causing endless issues of P80 model Volvos.
5) Have you checked compression values? These cars can get 'lawnmower syndrome' where they loose compression. Look it up on MVS for solutions.
6) Check the spark-plug leads for damage. I have found a few over the years that have had the leads crushed or cut by poor fitment under the cover at the end by the distributor.

Good Luck!

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

tardcart
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tardcart

Re: Any good 850 techs out there? Got a challenge for you

Post by tardcart » Sat Jun 15, 2019 6:49 pm

white smoke is coolant or break fluid. plug the vac line to the brake booster and see if that makes a difference.



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Re: Any good 850 techs out there? Got a challenge for you

Post by Chuck W » Sat Jun 15, 2019 10:03 pm

scot850 wrote:
Sat Jun 15, 2019 3:54 pm
check the coolant temp sensor.
This. Primarily, check the connector for corrosion.



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misha
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Re: Any good 850 techs out there? Got a challenge for you

Post by misha » Sun Jun 16, 2019 2:44 am

Try to start it with Maf connector disconnected...make it run first...then proceed with it disconnected and see how it runs.

Good advice about ECT and it's connector for BOTH sides....wiring loom and sensor side.
Both of these connectors for BOTH sensors are prone to failure.

Sensors MUST be oem!
What are the codes?


'97 850 2.5 20v /fully equipped/ Motronic 4.4 / 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

Pumpkinmikey
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Pumpkinmikey

Re: Any good 850 techs out there? Got a challenge for you

Post by Pumpkinmikey » Mon Jun 17, 2019 7:00 am

No codes.temp sensor shows on my scanner data display accurate..cleaned .head gskt was not replaced..intake manifold gskt was replaced.



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RickHaleParker
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Re: Any good 850 techs out there? Got a challenge for you

Post by RickHaleParker » Mon Jun 17, 2019 7:43 am

Have you checked for a clogged Air filter and a dirty Throttle Body?
Could there be something in one of the air tubes, like that shop rag that went missing?


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
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1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

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