Code 9, H22 swap.
#1
Code 9, H22 swap.
Hi, I have a 98 civic, with an H22a4 swap did myself. Has wireworx swap harness and P28 ecu with hondata S300 v3 done by hamotorsports. Got car running and throwing code 9, so I ordered new distributor and still getting code. Set timing at 16 degrees and double checked that timing belt has not slipped. Car runs horrible and driving it done the road it bucks bad. But when go full throttle the car pulls fine but part throttle or idle it runs rough and rich.
#2
Re: Code 9, H22 swap.
Code 9 can also be caused by a bad CYP sensor wire or bad ECU.
Ohm test the CYP sensor from the two pins of the ECU connector. Post reading.
Ohm test the CYP sensor from the two pins of the ECU connector. Post reading.
#4
#5
Re: Code 9, H22 swap.
What @muellersfan said. Unplug the ECU (disconnect the battery first) and measure the resistance of the three distributor sensor circuits from the ECU plug. This test goes through the ECU adapter, the harness wiring, the plugs under the hood, and as a bonus, the distributor itself, all in one shot. Also test those sensor wires for resistance to ground, it should be open circuit.
#6
Re: Code 9, H22 swap.
What @muellersfan said. Unplug the ECU (disconnect the battery first) and measure the resistance of the three distributor sensor circuits from the ECU plug. This test goes through the ECU adapter, the harness wiring, the plugs under the hood, and as a bonus, the distributor itself, all in one shot. Also test those sensor wires for resistance to ground, it should be open circuit.
#7
Honda-Tech Member
Re: Code 9, H22 swap.
Miss... YES. Code... Nope.
Trending Topics
#9
Honda-Tech Member
Re: Code 9, H22 swap.
I just chased this code for hours on a friend of mine's track car. Ultimately, it would be nice if you could get the MIL to turn off... but if the engine performs normally and doesn't exhibit any undesirable symptoms such as the lack of VTEC or short revving... I would say run it. Oh, and check your codes often to make sure something else hasn't created a problem.
#10
Re: Code 9, H22 swap.
VERY Low compression in cyl 3 --> definitely fix this problem there FIRST. Then go from there.
Thread
Thread Starter
Forum
Replies
Last Post