cooda069

my car starts it runs but the engine wont rev above 3 grand?i know its not floded it getting fuel fire air. i dont get it

IRISHMAN

what year and model do you have??

Icemark

Title edited to better reflect the question

cooda069

its a 1990 gtu
i dont know if its original engine
i just bought it
but i know its a 13b

MAX-IMAL

check your conection on the secondaries proly a short.

billzrx7

wont rev above 3 grand? clogged cat. remove the cat and see if it happens. guarantee it wont.

rx-7s rock

Sounds like clogged exhaust. Same thing happened to my car.

SpeedFreak03

It does sound like a clogged cat. Try removing it and see what happens. Should work!

billzrx7

man you guys are slow on responses :P

blaster834

I have a prob kinda like that only it happends at a higher Rpm around 5.5 and it is very hard to get it any higher.

poor_red_neck

Have you ran ECU codes?

Im not sure for the RPM, but there is such a thing as running in a "slug" mode or whatever... only happens if your OMP is not working.

http://www.1300cc.com/howto/how2/codes.html

cooda069

ir was flashing like 4 codes im trying to find sensors now a crank angle split air, pressure sensor and, oil metering sensor. anyone have it also is the omp the same as the sensor where is sensor located. what the hell does split air valve do

cooda069

just looking for oil metering pump now........anyone

brohr01

ok, if you car wont rev above ~2500-3000 than the car is most likely in limp mode. i know this all to well, my car and my friends car are both in limp mode. the only thing that will cause this is the MOP not working. With my car it never threw an error code, just went into limp mode. other cars do throw the code and then go into limp mode. it sounds like you did pull the code for the MOP, right? if you did than you need to replace it. the MOP is located on the front of the engine just below the air pump, its hard to see but just look for 4 clear hoses with oil in them that run up to the top of the block. the electrical connection for the mop is right to the left of the alternator, they are on a braket that also is a mounting point for the alternator. there will be 2 connectors one with 3 wires the other with 6(i think, it might be 8) you cant miss them. the best way to remove the MOP is from under the car, jack it up and you should have a clear view of it. disconnect all the lines going to the MOP before you unbolt it from the block. then slide it right out and throw a new one in there, becareful with the clear lines they might be brittle and crack on you. the MOP from mazda is very expensive so you might want to find a used one from someone in the club.

before you start ripping the MOP off you should probibly check it as the FSM says so, heres a link, goto pages 18-19 for the troubleshooting of the MOP.
FSM for MOP