Car has revved through to 6300 before in first gear, but in second, it seems to hit a "fuel cut" @ 5500 or so now.
Suggestions?
I'm going to be doing cap/rotor, plugs, and wires in the near future. Car idles fine and pulls hard to 5500, along with the timing belt having been done 3000 miles ago at a Toyota dealer, so I'm reasonably certain it isn't a timing issue. Other suggestions? Searching MR2OC didn't seem to yield any real results other than just that.
Pull the codes from the ECU.
Dr. Hess wrote: Pull the codes from the ECU.
How? CEL is off.
You're gonna have to research that one yourself. I suggest starting with a Chiltons at the library if you can't find the instructions via google. It only takes a paperclip to do.
Will do.
Hmm. Interesting. I just disconnected MAP sensor, car idles up to around ~1500, but no throttle response at all.
Also, turns out that the car only revs up above 5500 when the car isn't totally at temp. Tried in both neutral and first gear a bit ago, after the temp gauge was in the middle and the "cut" kicked in at 5500 again.
Any advice from here?
There wasn't a cover on the diag port, so I have no idea which pins to jump....
Code 31 is the only code. Figured it out from the BGB. Figure that's from me disconnecting the MAP earlier.
If it isn't showing any codes, then go back to simple stuff: Is the catalytic converter plugged up? Muffler or exhaust plugged? Air filter OK? Spark plug wires OK? If a wood mallet applied to the cat produces a mariachi sound, for example, it's shot.
Gotcha. Just seems odd that the car would have an "artificial" rev limit there, while it pulls fine all the way up to that limit.
fuel pump going bad or the filter bad? I know in a carbed car, if the pump is going bad, you are usually fine in 1st gear because you do not spend that much time getting to readline in that gear.. but as the gears get "longer" with each upshift, the fuel will start to run out sooner
I think my first step is to find somebody in the area who could check my timing (I'm a noob).
Anyone in the DC area like beer? ;).
How recent is the problem? I'd have the timing belt checked....
will in first but wont in second sounds like load is effecting it. stuck diapham in fuel pressure regulator? vacuum leak effecting fuel pressure regulator? just my 2 cents
It's also inconsistent, which makes me think it isn't timing. Took it to 6300 a couple times on the way home from work. Then it only pulled to ~5800 on my last attempt. WTF.
Did someone swap a diesel in by chance without your knowing?
What's the alternator putting out? That is, can we tell if this is a real engine issue or are we just trying to treat a number here? 500 RPM isn't much difference and things go by real fast at the top end of the RPM range.
The effective redline of the 5sfe is 4800rpm anyway. 
Check and make sure your throttle cable is adjusts / opening fully?
These groups should know: www.mr2oc.com
http://mr2.com/forums/
Whoops, just saw you were at mr2oc. Sorry.
Check your coolant level.
Also check your IAT sensor. They like to go out on the 92-93 motors, and will cause all sorts of weird crap. When you say that it runs fine before operating temps are reached, that tripped me that it might be the problem, since the ECU ignores the IAT sensor from the beginning. I think, at least... i haven't really worked on my 5sfe for going on a year now.
Fuel volume is the most likely suspect. Fuel filter and the one in the tank, pinched fuel line, tired fuel pump.
Still having the issue. Timing is spot on, cap/rotor/plugs replaced. Turns out that the cold/gear was just part of the intermittent issue. Happens now randomly, in any gear, including neutral. Any suggestions?
still say fuel
I'm replacing the fuel filter on Saturday, but it seems like the car is running TOO rich. I smell fuel if I hold the throttle down at this "soft" rev limiter for a second or so.
I can understand that situation. You're getting full fuel load to cylinders that won't fire it. So, that sounds normal.
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