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Help, Advice, Owners' Discussion and DIY Tutorials on all Volvo's "mid era" rear wheel drive Volvos.

1975 - 1993 240
1983 - 1992 740
1982 - 1991 760
1986 - 1991 780
1990 - 1998 940
1990 - 1998 960
1997 - 1998 V90/S90

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tazo242002

heeeeellllllppppp

Post by tazo242002 »

i have a volvo 340 gle 1.7 (E) 1988. the revs keep dropping and rising and i can't do anything to stop it can any one help

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Joined: 30 January 2003
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Location: Alberta, Canada

Post by Volvord »

Although I am not familiar with this model the usual cause of irratic idle is a dirty idle air control motor or dirty thottle body. I would suggest that you clean both of these with an appropriate cleaner. Other areas that could cause this problem are dirty injectors (but this will usually effect drivability and power), ignition (spark plugs & wires), vacuum leaks.

Hope this gives you some place to start looking

Volvord 784VC
http://www.telusplanet.net/public/gilesij/Volvord/

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