need new AMM also which fuel system LH2.2 or LH2.4?

Discussion in 'General Motoring' started by chris mears, Mar 2, 2006.

  1. chris mears

    chris mears Guest

    Hi there.

    I am trying to identify the fuel system that is installed on my car.

    I am going to replace the AMM on my car (it has failed to work). The
    previous owner replaced the original AMM (Air Mass Meter/Air Flow
    Meter) with one from a salvage yard, I think he put in the wrong one.

    My car is a 1988 Volvo 240 wagon.

    Are there any identifying marks on the car that would identify whether
    or not I had LH2.2 or LH2.4 fuel injection?

    It seems that each (LH2.2 and 2.4) have their own specific AMM. The
    AMM I removed from the car has a serial number that ends in 016. 016
    seems to belong to 2.4 injection, but that injection system seems to
    belong to 1989 and newer cars. My detective work tells me my car
    should have 2.2 fuel injection which uses the 007 AMM (serial number
    007) as my car would be part of the 1985 to 1988 production.

    I understand that it is very important to install the correct serial
    number AMM on the car. That said, what would happen if I installed the
    wrong one? The is out of service now, and up til now the mileage and
    performance was not as great as it could have been. I have a feeling
    that I didn't have the part (correct) in the first place. Since I have
    to special order the new AMM anyway, I want to make sure I am getting
    what I need. (it's really going to be unfortunate if I order
    something, wait the two weeks to get it, and it's wrong).

    Can someone help me identify my cars fuel system?
    Tell me what to expect if I install the wrong Air Mass Meter?
    Share any other interesting stuff I should know. I've been working on
    old Volvo's for some time now, but this car is my very first (ever) car
    with fuel injection (I'm a long way from my much missed 1979 with the
    good old b21a (just gave the car away last year, should've never done

    Thanks, I really appreciate the help.

    Chris Mears
    Charlottetown, PEI
    1988 Volvo 245 "Daisy"
    chris mears, Mar 2, 2006
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  2. chris mears

    volvo240drew Guest

    I don't know specific identification markings or anything like that,
    but my '88 (US spec, not Canadian) 244DL has LH Jetronic 2.2 in it. I
    can check the AMM part # if you want.
    volvo240drew, Mar 3, 2006
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  3. chris mears

    volvo240drew Guest

    Yeah, turns out my AMM part # ends in 007. So it looks like someone did
    install the wrong AMM type for your car, as I have no problems with

    hth drew
    volvo240drew, Mar 3, 2006
  4. chris mears

    User Guest

    The 2.2 meter (007) has a bung with an aluminum press fit removeable
    plug (drill two 1/8" holes and pull out with needle nose pliers)over the
    idle mixture adjusting screw. On the 2.4 meter (016) there is no
    provision for mixture adjustment.

    The 2.2 system may have a thumb wheel idle trim screw on the throttle
    housing. The 2.4 system does not.

    Check both the Volvo and Bosch part number on the fuel control unit
    behind the right side outer kick panel and report back or call a dealer
    to determine the application of the unit. Also post the VIN number to
    determine the true year model of the car. The last letter in the VIN
    should be K=1989 L=1990.

    User, Mar 3, 2006
  5. chris mears

    chris mears Guest

    So it's really starting to sound like the previous owner installed the
    wrong AMM. Cool as I think I may have found a decent used one in the
    salvage yard (I am assuming that both AMM's (007 and 016) fit in the
    same diameter intake hose(?)

    I have the thumb screw adjuster on the throttle body housing. By the
    way, turning this screw really doesn't seem to have any impact on the
    car's idle. Should it?

    Most suppliers I talk to only show the 007 part as installed in my car,
    what are the chances that the 016 was installed originally at the

    chris mears, Mar 3, 2006
  6. chris mears

    User Guest

    If the throttle switch and throttle plate are set correctly it should
    have some impact, yes.
    Pretty slim.

    User, Mar 3, 2006
  7. chris mears

    chris mears Guest

    So armed with this new knowledge, I am going to go ahead and order a
    007 AMM from my suppliers and hope for the best. I need the car back
    in service, so I will be ordering overnight fast.

    What would happen to the car if I installed the wrong AMM anyway? I'm
    thinking the effect would be very similar to that of running with a
    dead AMM. Could it damage the ECU?

    chris mears, Mar 3, 2006
  8. chris mears

    doc Guest


    Call the parts Dept at your local Volvo dealer, give them the vin # of
    your car and ask them which Bosch number is correct.

    Even on the 1993 240 DL there were two different AMM's used. One is
    the 007 and the other is the 016.

    Keep in mind if you order onle online or locally electrical parts or
    often either not returnable or if they can be returned will have a
    hefty "restocking fee."

    Good Luck

    doc, Mar 3, 2006
  9. I think you should remove the trim panel in the right side footwell, and
    check the number on the fuel injection ECU.
    If you post the bosch number like 0 280 000 561 in the newsgroup, you could
    get teh answer you are looking for.


    Per Hauge
    Per Hauge-Nielsen, Mar 4, 2006
  10. chris mears

    mar Guest

    I think you're lucky you need the 007. I was pricing AMMs on eBay last
    week and noticed that the 007 seems to be readily available and cheap.
    The 016 was much more money and they didn't seem to be offered up for
    sale nearly as often.
    mar, Mar 5, 2006
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