BrickBoard Archives
The files contained in this listing have been automatically archived from the active forums. Because the vast majority of posts are now in one place, this archive is considered legacy. You should use the SEARCH feature OR choose your topic and select date tabs within the forum you choose.
Adjusting AMM to control CO[200/1989] posted by Randy Starkie on
Thursday, 12 April 2001, at 3:44 p.m.
MVP Inc. has a nice tech tip about actually making a tester to attach to the LH 2.0 and LH 2.2 system so that you can control the CO level by adjusting the AMM. See the link below and go to #7.
My problem is that I want to adjust the AMM as described in #7 but I need to do it to an 89 240 which has the LH 2.4 system. There are no pigtails as described for the 2.0 and 2.2 systems. Can someone tell me how to make the necessary adjustments to the LH 2.4 system. This car squeaked by on the CO level of emissions at the last test (two years ago) and I'd like to check the AMM adjustment before I take it in for the test this time. Thanks for any help on this.
Randy Starkie
MVP Inc. Adjusting AMM
Re: Adjusting AMM to control CO[200/1989] posted by John Sargent on
Thursday, 12 April 2001, at 6:21 p.m.
Early models of the AMM for the LH 2.4 Jetronic had an adjustment screw for CO settings. The LH 2.4 system is self adjusting for CO with the feedback from the O2 sensor. The adjustment screw was deleted sometime early in the 1989 model year as near as I can tell. If your CO is not in spec, you may need a new O2 sensor, and maybe a catalytic convertor.
--John Sargent