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Old 04-15-2018, 04:42 PM   #1
92VTECSi
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Sluggish below 3K RPM once warmed up

1992 Prelude Si with H22A swap, having an issue after driving and motor is warmed up it gets really sluggish in the low end, sometimes it will even seem like it continues all the way till vtec crossover. Still has the MAP sensor on the firewall and the IAB's are connected straight to the manifold (vaccum block under intake is broken and cant find a replacement). I thought maybe the IABs would cause a slight low end powet problem but this seems to be something else. My EGR is still connected and working but if I run the CEL codes it still shows a code 14 but no light illuminated. Still running a IACV but have a Skunk2 Alpha with FITV deleted. Still running a p13 ecu also. Anyone got any ideas?
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Old 04-15-2018, 11:57 PM   #2
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i'm having the same issue. i have replaced: tps, iacv, plugs, wires, cap, rotor, some vacuum hoses, and pretty much the whole exhaust. and still getting code 14 and 23. My thought is that the knock sensor trips somehow causing the car to go into limp mode, then setting off the iacv code because of the limp mode. prior to replacing my exhaust system i knew i had a leak somewhere, in the process of replacing it i noticed a whole in my cat converter. i have ordered a new converter and am hoping that this rectifies the issues. i feel the abnormal air flow is causing the block to shack slightly more then normal and causing my knock sensor to trip thinking it's a misfire or something. i'll keep you posted on what i figure out.
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Old 04-21-2019, 06:55 PM   #3
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Any luck figuring this out?
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Old 07-04-2019, 04:47 PM   #4
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I had an issue with my '93 Accord with F20b. Eventually found that it was a rod bearing issue which had also made too much wear on the crankshaft. So to fix I had to change the crankshaft and the rod bearings...or the whole engine block. I just sold the car for a half price back then
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