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Stumped on probs with 93 240... 200 1993

posted by  someone claiming to be Frustrated on  Mon Jul 22 04:33 CST 2002 [RELATED]

For almost a year now my 93 has had a poor running problem.. at low engine speeds it sputters and coughs and bogs for a second or 2 before operating normally. Highway cruising is normal, power seems normal once it gets going... its just fast changes in throttle which throws it off. I swapped AMMs to no avail, new cap, wires, rotor, plugs gapped correctly, no vac leaks. Idle is also ok, seems to run a little rough sometimes, but in general its pretty smooth. Also car seems to get worse as it warms up. On cold acceleration it just bogs a bit, after its warm it turns in to a studder. O2 sensor i know needs to be replaced.. but i don't think thats the problem. I am stumped.. coolant temp sensor? I'm not sure what the resistance values are supposed to be at temps.. I am fairly new to volvos, and all i have is a haynes which i found isnt worth wiping my a$$ with.. I've use my saab bentley as more a reference.. so any suggestions? what is the sensor supposed to read, and if its not that sensor what could it be? no CE light is on.








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    Stumped on probs with 93 240... 200 1993

    posted by  powellrb on  Mon Jul 22 13:32 CST 2002
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Tue Jul 1 11:09 CST 2014
    [RELATED]

    A good source for parts is www.FCPGROTON.com. Also, first thing - get the Bently manual, use the Haynes for a doorstop. You didn't say how many miles you had on her so I would do what the previous posters suggested as well as cleaning the throttle body and making sure the TPS is adjusted correctly. This can drive you nutz if it's out of adjustment.
    RP
    --
    RP '87 245 (Ol' Blue)276,000 mi, '93 245 (Ruby)152,000 mi, '02 BMW 325, '98 Mustang Cobra, '87 Harley Heritage....








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    Stumped on probs with 93 240... 200 1993

    posted by  chris herbst on  Mon Jul 22 11:40 CST 2002
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    last visit: Mon Oct 20 20:32 CST 2014
    [RELATED]

    Fuel pressure problem? It CAN cause a check engine light, but not necessarily. Is the computer clear of codes?

    The quick throttle problem is evident with fuel pressure issues, from what I've seen. Then it seems to smooth out. I suppose the big jump in vacuum at the pressure regulator depletes the available pressure until it's able to catch back up.
    --
    1992 940 wagon, 72k
    as well as others.








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    Stumped on probs with 93 240... 200 1993

    posted by  someone claiming to be Frustrated on  Mon Jul 22 07:20 CST 2002 [RELATED]

    OK thanks for the info, will do.. I pulled out the temp sensor and can't get any readings out of it.. so I'm thinking thats the culprit , or at least one of them.. secondly, where do i get a new sensor for the LH 2.4 system? I pulled one out of my saab, but its different style , because LH 2.2. The volvo 2.2 (-89) ones look similar. So is there a cheap internet place people have gotten them from? Or am i forced to pay dealer Price$ ? Tanks again (volvo joke :) )








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    Stumped on probs with 93 240... 200 1993

    posted by  someone claiming to be jda2000 on  Mon Jul 22 06:58 CST 2002 [RELATED]

    had same problems with my '92 745 and this helped my problem:

    -clean and tighten electrical connectors to all the sensors and fuel injectors,
    -clean and tighten all gound connections, specially the FI gounds
    -check the color of the tag of the rpm sensoR(by the electrical connector). Mine had a yellow band, which means it was the original one. The insulation of this sensor crumbled in my hands when i pulled it to clean the electrical coonector, exposing bare wires.
    The new sensors have a white band, are more reliable and less prone to intermittent failure.








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    Stumped on probs with 93 240... 200 1993

    posted by  jkordzi on  Mon Jul 22 05:16 CST 2002
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    last visit: Wed Sep 12 02:43 CST 2001
    [RELATED]

    First thing - get a Bently for a 240. Then, follow the procedures for downloading any codes and checking the various sensors. It's fairly well detailed. You don't always get a CE light when the ECU spots a problem and sets a code.







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