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1990 Volvo 744 Turbo throwing codes - Swedecar? Posted by Larry West [Email]  (#1140)  [Profile/Gallery]
(more from Larry West) on Mon, 6 Jul 2009 06:52:17
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I'm putting this out to all, and hoping Anders reads this BB, too!
Patient is a 1990 744 turbo, Bosch LH 2.4 & EZK ignition.
At issue is a recurring Check Engine light. When checked, the codes are:
LH: 1-2-3; EZK: 2-2-4. Both point to a "missing or faulty signal from the Engine Coolant Temperature Sensor". Occasionally, other codes accompany, but these are the most prevalent, with the LH leading the pair.
I have:
changed the ignition parts (plugs through rotor);
cleaned the throttle body
changed the engine coolant sensors (both for the gauge and the ECUs), cleaned the grounds between the valve cover and firewall.
I'm all but convinced I'm chasing an electrical troll. I'm planning on finding, cleaning, and re-connecting any and all other grounds that I can find this week.
I'm also trying to get this car to pass NJ emissions. Last time it failed by the tiniest of margins on CO%, by 0.02%... Maybe all I've done has already helped, but I need to keep the CEL off!
THanks,
_______________________________________ Current: 2002 9-5 Aero Kombi Cosmic Blue 2000 9-5 SE sedan, Imola Red 1990 900S Rose Quartz, Auto Past: 1999 9-5 LPT Combi 1999 9-5 LPT sedan 2002 9-5 Arc 1990 900 5-speed 1986 900 turbo Convertible 1991 9000 turbo 1980 99 GLi 1986 900 turbo 1986 900 S 1991 900 turbo 1984 900 turbo 1976 99 GL
, Mon, 6 Jul 2009 06:52:17 <-- Viewing This Message, Tue, 7 Jul 2009 18:40:22
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