99 S70 GLT missing on #2 cylinder - Volvo Forums - Volvo Enthusiasts Forum


Volvo S70 Made from 1998 to 2000, this sporty model replaced the 850 sedan and instantly became a hit.

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Old 06-23-2009, 12:03 PM
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Default 99 S70 GLT missing on #2 cylinder

Hello, my S70 is missing. I changed plugs and realized that cylidner #2 is not firing. I bought a new coil and it is working but still cylinder is not firing.

I checked compression and it's only 30lbs in this cylinder. It is 150lbs in all other cylinders. (compression check is engine idling).

However when I rev the engine cylinder #2 compression does go up to 130lbs.

Do I have a stuck or burnt valve?
What is next step? If I do have to remove head and do a valve job what special tools are required to remove cylinder head and then reassemble on engine?

Thanks for any and all help!

Last edited by TRC1972; 06-23-2009 at 12:05 PM. Reason: clarification
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Old 06-25-2009, 07:20 PM
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I would say burnt valve.
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Old 07-07-2009, 02:57 PM
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My daughter's 98 S70 GLT developed a similar problem yesterday. OBDII code shows #2 cylinder not firing. But the issue is intermittent. I am hoping it is a failing plug wire.
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Old 07-07-2009, 10:41 PM
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Originally Posted by tech View Post
I would say burnt valve.
very doubtful it's a valve.

This has been a frequent issue on other forums and this one as well. Common fixes have been spark plugs back to OEM, fuel regulator relay, coil or plug wires. Sometimes even the cam postioning sensor but that would throw a code I believe. Even one had a bad injector
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Old 07-08-2009, 07:44 AM
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It is a burnt valve on #2 cylinder.
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Old 07-08-2009, 06:52 PM
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I have done many burn't valves on the 960, and S70.
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Old 07-09-2009, 12:55 PM
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Put in new plugs last night and it seems to be fixed.
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2, 740, burnt, clinder, compression, cylinders, firing, fuel, glt, injector, installation, missing, number, s40, s70, valve, volvo

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