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93 850 consensus on spark plugs?

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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JimBee
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93 850 consensus on spark plugs?

Post by JimBee »

I think it's time. Bosch coppers? Others?
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rspi
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Re: 93 850 consensus on spark plugs?

Post by rspi »

Volvo OEM.
'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos
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misha
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Re: 93 850 consensus on spark plugs?

Post by misha »

Volvo oem or equivalent:
-NGK BKR6ETUC
-EYQUEM RFC 52 LS3
...the ones which are inside of Volvo oem spark plug package. ;)
'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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sleddriver
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Re: 93 850 consensus on spark plugs?

Post by sleddriver »

Bosch, NGK coppers work fine and are inexpensive. Denso is another option. No on Bosch platinum. Yes on NGK platinum. What does your manual say?
1998 V70 T5 226,808 miles. Original Owner.
M1 10W-30 HM
JimBee
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Re: 93 850 consensus on spark plugs?

Post by JimBee »

I got the NGK coppers, will install them tomorrow.

Ignition is working. I used the inline tester and a ground wire on the plugs to test each one; they all spark, a couple brighter than the others. And they smell of gasoline so I guess some fuel is spritzing into the cylinders—and there's plenty of pressure at the fuel rail / schrader valve.

Strange that in June it started instantly after sitting since February, which is how it has always started in the 8 years I've owned it, even after sitting for long periods. But now not even a pop, no hint of life!
Maybe the plugs will make a difference. Seems like a long shot.
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sleddriver
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Re: 93 850 consensus on spark plugs?

Post by sleddriver »

Be sure to properly gap.

I myself would never let any car sit that long without starting it.
1998 V70 T5 226,808 miles. Original Owner.
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shaker_chi
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Re: 93 850 consensus on spark plugs?

Post by shaker_chi »

I have good luck with Bosch copper. They won't last as long as O/E though.
Good luck.
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erikv11
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Re: 93 850 consensus on spark plugs?

Post by erikv11 »

:lol: a no-start problem sneakily disguised as a plug question!

My first thought is lawn mower syndrome, definitely give the oil-in-each-cylinder routine a try.
'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
'99 Camry V6 :shock: 130k
gone: '96 NA 850 210k, '98 NA V70 182k
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