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1993 940T Running rough intermittent 900 1993

uid 46171's pic
posted by  kittysgreyvolvo on  Sat Jul 24 08:31 CST 2021
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last visit: Sat Oct 18 15:23 CST 2014
[RELATED]

Hi Bill,

For your rough running diagnosis, you have checked for DTC fault codes?

https://www.brickboard.com/FAQ/700-900/EngineOBDCodes.htm

As spook says to treat bonded low volt electrical connections using DeoxIT-D.

The 700 and 900 series has that fuse and replay board or platform hidden under the center console behind the ashtray on 700 and 900.

As spook points out, the aged electrical connector can form corrosion and that resistance the corrosion presents.

Read John Sargent's comments here and in posts you can search for on the topic:

https://www.brickboard.com/FAQ/700-900/ElectricalCircuitsRelays.htm#Relay_and_Fuse_Panel_Removal

Glad you got the Haynes manual. Hopefully shows process diagrams on your model year.

Did the Mitchell Service diagrams help? Not the electrical system process diagrams, yet pretty okay:
http://www.v8volvo.se/mekartips/volvo/

And you need to perform some suspension work also? Do you have the "live" rear axle or the independent rear suspension (IRS). If not already, bushings on either rear axle may need replacement. On IRS, there are seals, U-joint boot covers and bearings and splined shafts on the axle that would appreciate a good cleaning and grease repack.

Else, if an idler armor steering link is bad, replace in pairs. I'll imagine you have read through the FAQ.

Hope that helps and happy Sat-Your-Day!!!

Buttermilk Volvo

--
Beh.






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