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1996 850 won't start...

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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Year and Model: 1996 850 Turbo
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1996 850 won't start...

Post by augman6 » Mon Dec 02, 2019 9:03 pm

About 3 weeks ago, I turned on my car. It ran for maybe 20 seconds then slowly over about 10 seconds lowered RPM until it died. Replaced fuel pump and fuel pump relay as those are common to go on this car at this milage (138k miles), and no dice. It cranks but won't start. Then I put new plugs in because I pulled out the old ones which were black. I also let it sit to make sure any gas could evaporate if it got flooded at all. I'm getting spark (video of tester included) but again, no start. Fuel is getting to the rail. I used the flow chart but cannot make out what to do next.

https://photos.app.goo.gl/atY3tr99FnojFAY58 https://photos.app.goo.gl/MxRssBcxUQ39aLs17

Any help is appreciated, my dad and I are just lost as to what it could be. We think maybe something with the timing belt but haven't worked out how to go down that road yet.

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Re: 1996 850 won't start...

Post by abscate » Tue Dec 03, 2019 3:51 am

Check that fuel pressure at the rail. These cars need correct fuel pressure,not just some gas at the squirt nozzle.
Pull ypthr distributor cap and inspect rotor and cap for dirt, oil, corrosion, kangaroo droppings

How many miles are on the beast? ( reading comp fail, 138k)

Look at the quality of the spark with a plug out, and take compression while you have it out,

Skip timing belt for now. They don’t go wrong, other than spectacularly.
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Re: 1996 850 won't start...

Post by erikv11 » Tue Dec 03, 2019 1:42 pm

It doesn't sound like there is much compression in the videos. Check compression with a gauge as suggested and/or most relevantly try the lawn mower syndrome fixes. Long crank with foot to the floor, or try a teaspoon of oil in each cylinder and a long crank with foot to the floor.

Other thoughts:
- Checking under the cap is a good idea, possibly a couple things went wrong at the same time.
- didn;t mess up the order of the plug wires? Coil wire still connected?
- If the new fuel pump relay is Kaehler then beware, people have had them be bad right out of the box.
- Double and triple checked all connections like all sensors? I suppose you never disconnected (m)any of those.
- Any codes, or codes pending?
'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, 285k
'06 S60 R, 165k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

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