professorman

I have a 99 Accord LX 2.3L with Automatic transmission with 120k miles. I just picked it up for my wife and I am going through the maintenance items. I changed the transmission fluid today.


I was doing a test drive today, and so I floored it, it accelerated to the red line, and I felt like I hit the rev limiter, and it wasn't upshifting, so I eased up off the pedal. I tried it a second time, I hit the redline, and sure enough, it was not upshifting. It just stayed there, bouncing off the redline fuel cutoff. After that, my Check engine light started flashing. I drove to the nearest auto store to check the CEL, but they say I have to come back in the morning . When I turn the car back on, the CEL is now constantly on.

The car drives and shifts perfectly normal otherwise. It downshifts when I push the pedal to pick up speed, and it upshifts like normal at other times.

Is it normal to not upshift when I hit the rev limited in these cars?

What could my problem be?

v4lu3s

check the codes and see, pretty sure it is pin 4 and pin 9 on the obd2 plug that you jumper and can count blinks.

professorman

Really? Didn't know that you can count blinks on OBD2. I really need to get a shop repair manual for this gen Accord.

professorman

The CEL says "Misfire in Cylinder 1". Could it be that the misfire occurs as the car approaches the redline, and it is a misfire that I feel rather than a fuel cut-off?

I changed the spark plugs which were well aged (very well though), but I did not change the wires nor the distributor cap & rotor.

MAD_MIKE

I do not see that as causing a no upshift, however since I have no idea what the logic is on that system I cannot say definitely that is the issue.

Back probe the TPS and see what the voltage readout is. Have you tried 3/4 throttle?

professorman

Yes, it upshift and downshift fine at all other throttle positions.

I disconnected the spark plug wires and hung them with a stretched bungie cord in order to do a compression test on the engine, hanging them (stretched unfortunately) so that they wouldn't spark with metal in the engine bay. I am wondering if one of the wires got a little loose on the distributor cap side.