A few months ago I swapped my F22A6 in my 1992 EX CB9 5-speed to a F22A1. I did the swap as the A6 was very high miles and the A1 I found was very low miles.
For the swap, I also swapped over the PT3 ECU for the F22A1, but I retained the exhaust manifold and downpipe from the F22A6 and just bolted it right on to the new F22A1.
Since the O2 sensor was further down on the A6 downpipe, I modified the F22A1 wiring harness to reach, soldering in wire to extend it to the the F22A6 O2 sensor. I have since come to learn that was a mistake. The engine is throwing code 43 and has a rough idle as well as hesitation at higher RPMs.
What should I do for a solution?
I was thinking:
(1) cut out the section of wire I had soldered and re-crimp the wire into an oem connector. buy an aftermarket wire harness extender from amazon and plug in it to extend the harness to the o2 sensor in the lower downpipe location. Since it is an f22a1 motor with a pt3 ecu, does that mean I should buy an lx (f22a1) o2 sensor and put it in the location further downstream? Or should I stick with an ex (f22a6) o2 sensor?
Problems with this proposed solution are I wonder if the o2 sensor being a few feet further down on the exhaust downpipe in my setup vs. a stock lx/dx f22a1 setup will throw off the ecu?
(2) the other solution could be to rip out the ex (f22a6) exhaust manifold and downpipe and replace it with an lx/dx (f22a1) downpipe. then I could just cut out the soldered o2 extension on the wire harness, re-crimp in an oem connector , and put an lx o2 sensor in the stock location further upstream in the new exhaust manifold. downside to this solution is that it would be a lot more work and I don't have all these parts on hand.
So will solution 1 above likely work? Should I use an lx/dx (f22a1) or an ex(f22a6) o2 sensor in the downstream location if I go this route as I am running a f22a1 motor and ecu but have the old downpipe and exhaust manifold from my ex chassis?
Please let me know what you think or if you have any other proposed solutions I haven't thought of.
Thanks.
For the swap, I also swapped over the PT3 ECU for the F22A1, but I retained the exhaust manifold and downpipe from the F22A6 and just bolted it right on to the new F22A1.
Since the O2 sensor was further down on the A6 downpipe, I modified the F22A1 wiring harness to reach, soldering in wire to extend it to the the F22A6 O2 sensor. I have since come to learn that was a mistake. The engine is throwing code 43 and has a rough idle as well as hesitation at higher RPMs.
What should I do for a solution?
I was thinking:
(1) cut out the section of wire I had soldered and re-crimp the wire into an oem connector. buy an aftermarket wire harness extender from amazon and plug in it to extend the harness to the o2 sensor in the lower downpipe location. Since it is an f22a1 motor with a pt3 ecu, does that mean I should buy an lx (f22a1) o2 sensor and put it in the location further downstream? Or should I stick with an ex (f22a6) o2 sensor?
Problems with this proposed solution are I wonder if the o2 sensor being a few feet further down on the exhaust downpipe in my setup vs. a stock lx/dx f22a1 setup will throw off the ecu?
(2) the other solution could be to rip out the ex (f22a6) exhaust manifold and downpipe and replace it with an lx/dx (f22a1) downpipe. then I could just cut out the soldered o2 extension on the wire harness, re-crimp in an oem connector , and put an lx o2 sensor in the stock location further upstream in the new exhaust manifold. downside to this solution is that it would be a lot more work and I don't have all these parts on hand.
So will solution 1 above likely work? Should I use an lx/dx (f22a1) or an ex(f22a6) o2 sensor in the downstream location if I go this route as I am running a f22a1 motor and ecu but have the old downpipe and exhaust manifold from my ex chassis?
Please let me know what you think or if you have any other proposed solutions I haven't thought of.
Thanks.
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