Archive for EFSedan.com 1987 to 1991 Honda Civic Sedan Owners Club
 


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cwin13

code 9 got me down

88 lx sedan
OBD2 JDM GSR converted to OBD1 w/obd1 p72 ecu

Engine ran perfect in my CRV

symptoms - High idle (1200-1500 rpms) seems to stumble a little at idle like a slight misfire.

I've been fighting with this code 9 problem for about 6 months and I'm going crazy. I have a new distributor (plus tried 2 other ones), mechanical timing was off a tooth so when I changed timing belt I fixed that. All OBD1 wiring has been gone through multiple times and I even wired distributor directly to ecu.  I searched and found no vacuum leaks. I reset ecu after every fix I tried and cel appears back within 2 secs of turning the key. I installed a new IACV also. Car has power and drives fine
Any one have any ideas? Is it possible maybe my ecu jumper harness is defective? idk, just grasping at straws here

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