Kimmi

Thanks! It worked perfectly! Do you also know the correct Hz for the air flow meter? The frequencies I am getting are: 650 RPM - 23 Hz 1000 RPM - 36 Hz 1500 RPM - 57 Hz 2000 RPM – 81 Hz 3000 RPM – 100 Hz I appreciate the help!

I need the exact RPM when checking the Hz on the air flow meter.

Does anybody know where I can connect to C- to be able to get the exact rpm for the motor. Or can I get it from the diagnostic connectors? I have a sc400 1993.

Does anybody have a suggestion what the problem with my SC400 /93 is. It was recently fixed at an auto shop where they changed one of the oxygen sensors. Here is the problem. The car has high CO = 0,9 and HC = 140 values. The traction light in the middle of the speedometer is on all the time. When the car is worm and I keep the motor running at 1500 rpm it goes down to 0 and dies when I release my foot from the gas pedal. This only happens when running the car from idle to 1500 and then releasing. I am also getting a diagnostic error code 25. I am almost suspecting that there is a problem with the traction control, and that it is giving wrong information to the EFI. Does anybody have a clue??

Does anybody have the technical data for the engine controls Input sensors? The motor model number is 1UZ-FE (1993) The different Hz / rpm for the Air flow meter. The data for the Throttle Position Sensor Or does somebody know somewhere else on the internet I can find the info?

I recently received an error code 25 after driving approximately 10 miles. When I stopped the car I increased the throttle to 3,500 rpm for about 10 seconds. After that the motor started to wonder in-between 500 and 1200 rpm. After restarting, it was 800 rpm again. Other problems with the car is that the emission values are to high at 800 rpm. CO= 0,9 HC=140. I recently had the oxygen sensors checked, and one of them where replaced. So the problem ought to be something else then the sensors. Does anybody have an idea?

I have a 1993 SC400 and having a problem with the exhaust numbers. CO = 0,9, HC= 140 The autoshop that have checked the car found that one of the oxygen sensor was malfunctioning. This has been replaced and now it seams that the lambda rates are correct, but unfortunately the numbers are as above. The explanation I have received is that the catalytic converters have to be replaced. This is something I want to be certain about before replacing them. Here is what seems strange to me: When the car is run at proximately 4000 rpm the numbers are very good. Then when the rpm goes down to 800-1000 the rates are still good, but after approximately 1 minute the exhaust numbers start to wonder up to CO=0,9 and HC=140. The thing I find strange is that if the catalytic converters where bad the rates aught to be bad the entire time. Other info: The car has recently been served with oil, sparkplugs (I don know if it makes a difference, but they are standard sparkplugs and not the platinum 6000 mile sparkplugs). The motor works perfectly. The cars check engine light when on earlier and gave the malfunction codes 21,25,26,51 so the autoshop changed one of the front oxygen sensors, so now the light is of. The two back sensors were changed in august. They have also checked the sensors, and the only thing that seams strange is the two back sensors are very active.