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P1310 and P0301 codes and rough idle on 97 850 T5

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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johan489
Posts: 2
Joined: Wed Sep 25, 2013 4:42 pm
Year and Model: v70 1998
Location: United States

P1310 and P0301 codes and rough idle on 97 850 T5

Post by johan489 »

Please help I am stumped!
I have a -97 850 T5 with 130' miles and it throws the codes P1310 and P0301, the idle is also somewhat rough.

The codes are only thrown when the engine is cold, if do a reset when the engine is warm they do not come back.
In all other respects the engine runs good, no apparent lack of power or hesitation upon acceleration.

I have done the following with no result:
Changed spark plugs (Volvo OEM), distributor and rotor (Bosch) and Spark plug wires (Bougi).
Checked compression, 190 +- 5 PSI on all cylinders.
Changed all o-rings on fuel injectors and switched #1 and #5.

What do I do next?
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WhatAmIDoing
Posts: 761
Joined: Sat Jul 30, 2016 1:13 pm
Year and Model: 1998 S70 T5M
Location: North America
Has thanked: 66 times
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Re: P1310 and P0301 codes and rough idle on 97 850 T5

Post by WhatAmIDoing »

Pull all spark plugs, ground to engine, have some one crank while you check spark. Check fuel pressure at prime, idle and WOT. Try unplugging the MAF and then starting the car. Report back with findings.
'98 S70 T5M - 282,000+mi - forever a project
'99 S70 "AWD" - 220,000+mi - part out :cry:
Knows enough to be dangerous :wink:
johan489
Posts: 2
Joined: Wed Sep 25, 2013 4:42 pm
Year and Model: v70 1998
Location: United States

Re: P1310 and P0301 codes and rough idle on 97 850 T5

Post by johan489 »

WOT?
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WhatAmIDoing
Posts: 761
Joined: Sat Jul 30, 2016 1:13 pm
Year and Model: 1998 S70 T5M
Location: North America
Has thanked: 66 times
Been thanked: 57 times

Re: P1310 and P0301 codes and rough idle on 97 850 T5

Post by WhatAmIDoing »

wide open throttle
'98 S70 T5M - 282,000+mi - forever a project
'99 S70 "AWD" - 220,000+mi - part out :cry:
Knows enough to be dangerous :wink:
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