97 Accord won't rev past 5500 rpm
Okay, after digging around a bit in a more in depth search it would appear that ALL obd2 ecus utilize an ignition advance and retard resistant system. I always thought it started on 98+ ecus for accords and post prelude ecu's. So I'm going to stand corrected on this.
The funny thing is that I've seen the same information that I was giving given out numerous times and nobody ever objected. Even in the searches I found, even the people that were saying you couldn't adjust it were always adding "from what I understand" or "I believe". Also, while the crank sensor was moved to the crank from the distributor, it's not like it was something new so I just figured it was more accurate down there, not really that it was a complete change from what I was used to.
The funny thing is that I've seen the same information that I was giving given out numerous times and nobody ever objected. Even in the searches I found, even the people that were saying you couldn't adjust it were always adding "from what I understand" or "I believe". Also, while the crank sensor was moved to the crank from the distributor, it's not like it was something new so I just figured it was more accurate down there, not really that it was a complete change from what I was used to.
When the CKP & TDC sensors were moved down to the crankshaft, that leaves the distributor without any means to affect the timing. The CMP sensor stayed in the distributor, to distinguish between TDC compression vs. TDC exhaust stroke. The slotted distributor body was a mechanical feature left-over. They apparently didn't bother to redesign it until the generation change in 1998.
Dropping my car off to the shop tomorrow. They said they just can't figure out why VTEC is engaging so they suggest I just put a vtec controller on. I hate to do that but I seriously don't know what else to try.
In your first thread you said it had no cels. Somewhere in the last couple pages you said you have multiple misfire cels. When did these cels come up ? How did you pull these cel codes ? Are you sure there are indeed no other cels ?
If this is indeed vtec related here is a checklist of inputs for vtec engagement.
SOHC VTEC Explained - Honda Civic Forum
If this is indeed vtec related here is a checklist of inputs for vtec engagement.
SOHC VTEC Explained - Honda Civic Forum
I've tested this twice. If you drive the car to it's 53-5500 rpm limit, the CEL WILL come on. I took it to autozone both times and each time it was 5 codes, 1 for a misfire in each cylinder and 1 for misfire in ALL cylinders. No other codes but those. If I clear the codes they don't come back.
I still say if you had a problem with the vtec system you would be throwing a vtec code. The fact that you're getting misfire codes means it's something else, imo. Everything in this swap should be plug and play, save for the injectors. That would be the first thing I would be looking at. Roady said he thinks the f23a injectors won't fit, but I would be making sure they aren't on that car.
P1253 21 VTEC System Malfunction
P1257, P1258, P1259 22 VTEC System Malfunction those are your vtec codes.
P1253 21 VTEC System Malfunction
P1257, P1258, P1259 22 VTEC System Malfunction those are your vtec codes.


