RPM Problem

Post by **AznRide** » Mon Apr 21, 2003 4:42 pm

On my 91 240sx, if I floor my car all the way, i cannot get pass 5000 RPM. But if I step on it almost to half way, I can get to 7000 RPM. Im thinking my Mafs is not functioning right.

My check engine light went on so we did the dionostic test thing and it wouldn't read...what's wrong?

The car pulls hard, but right after it does, I get that rpm problem. I would want to fix it. Does anyone know how? Also, if you have a 91 240sx KA24DE manual mafs laying around, can I pick one up?

Post by **AznRide** » Mon Apr 21, 2003 4:42 pm

any tech on this?????

Post by **Nismo_Freak** » Mon Apr 21, 2003 4:42 pm

Replace simple things like the fuel filter, make sure the intake is not getting choked off either. Check vacuum lines. Pull the plugs and check their condition.

Post by **AznRide** » Mon Apr 21, 2003 4:42 pm

I checked the air filter, it is in great shape (brand new). I will start checking out the fuel one and spark plugs. It could be bad mafs right?

Post by **float_6969** » Mon Apr 21, 2003 4:42 pm

I'd do like nismofreak said and check all the little stuff first. Then I'd get the codes from the computer. The how to is in the .org FAQ. If you can't get the codes, take it to someplace that can read them for you. If you have a bad electrical component that is connected to the computer, you will know then. Normally if the MAFS is bad the computer goes into safety mode. You can't rev over 3 grand and it will have NO power and will run real rich. I don't think it's your MAFS, maybe the TPS. Check the codes and then you'll know.

Post by **AznRide** » Mon Apr 21, 2003 4:42 pm

I got the code 35 - which makes no sense for that code discription...weird.

Post by **float_6969** » Mon Apr 21, 2003 4:42 pm

Hmmm... Well it could actually. If the comp is getting wrong #'s it could be re-routing too much exhaust into the intake.

Post by **AznRide** » Mon Apr 21, 2003 4:42 pm

i couldn't hook up the comp to my nissan (no data sent, even though there was a hook up for it), so i had to do it manually in the passenger side. I got 35...what is it again??? i didn't understand what you just said.

Post by **UnderPressure** » Mon Apr 21, 2003 4:42 pm

also check the transmission sensor wires. i think there is a limiter at 5grand. . . just a thought

Post by **AznRide** » Mon Apr 21, 2003 4:42 pm

ok, i will try that. I just noticed today, when i was about 4 grand, my car sounded like it was hesitate to produce power...just something doesn't look right. I have to do something about it soon. I will post and let you guys know the result. Thanks a lot guys...

Post by **AznRide** » Mon Apr 21, 2003 4:42 pm

Oh, I found the code problem but i don't understand it. I get the 35 code, which is the EGR Temp sensor...what is that?

Edit: Is it Exhaust gas temp. sensor? Which is bad? Could that cause my car not going pass 5K?

RPM Problem

RPM Problem

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