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I will check my throttle body again just to make sure but i think it is opening all the way. Zuffen might be right about the voltage, i do need a new alternator it is not working to it's full potential. But i was told by more than one mechanic that a low alternator will not cause the low...

I don't think its the fuel system, i kind of ruled that out after i cleaned the injectors. I think it might be a cracked egr pipe, thus reducing accelelration or a leak some where. I just want ideas from people that have an sc400 for a long time and have worked on them.

The ECU is telling the OBDI tester that the pressure is ok and that the car is running slightly rich.That info rules out the fuel pump and ECU.

I fixed what caused my cats to clog. I disconnect the battery all the time to reset the compter. So thats not it. I had my timeing belt checked and it is good. I have not changed wheels, so that s not it. The valves specs, i have not checked but again i did not touch or modify anything. My car...

I have a 93 sc400 and it is low on acceleration. I have been trying to fix my car for the past six months. So far i have changed spark plugs, spark plug wires, distro cap, distro rotor, front two o2 sensors, air filter, fuel filter, had my injectors professionally cleaned and balanced, battery...

I appreciate the info.

I am troubleshooting my 93 sc400. Does anyone know the voltage that the fuel injector connectors are supposed to give out? This would help me a great deal. (I could remove the fuel system as the cause of my problem

I did not know that thank you for the info.

The reason i did it is because they were clogged and i did not have money to buy new ones.

Rush Imports will not sell me a supercharger kit for my sc400 becuase i am in the US. Why is that?

Will hollowing my cats reduce power? Will my car have enough back pressure? I have a 93 SC400.

Can the MAF sensor reduce the accelaration of a car dramatically. I have been trouble shooting my 93 SC400 for almost 6 months now and i still can not fix it.

It was my TPS. I sand down the metal contact that touches the throttle body part (If that makes sense) and the RPM meter stop going up and down. But sadly that still has not fixed my origial problem. I changed the fuel filter and still nothing. This is my original...

Thanks for the diagram.

Thats crazy, i was going to check my TPS but your telling me yours is good and it still does it. I have no idea what to do now.

What do you think it can be. A mechanic i know told me to check the EGR valve and the Throttle position sensor (TPS) Any one have any ideas?

This weekend i decided to clean my throttle body and my intake manifold. I put everything back together. Now when i accelerate in park or while driving, when i reach 2 on the RPM metter it drops down to 1 and goes back up. It continues to do that until i accelerate to 3 in the RPM metter. I also...

LOL, i did not ask if it is a V8 or V6. I asked what type of engine it is, what is the name or model of the engine.

I have one more question, how do i know what type of engine i have?

I have not worked on this car much. Where is the fuel cap located?