car turns on and wont go past 3800
01-17-06, 07:26 PM
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car turns on and wont go past 3800
My car turns on and only runs on one rotor. i think that the ecu might be bad because only one injector gets signal. Plus when i try to rev 3800 rpm the car sputters and wont rev!!! the computer gets only one signal from the injectors. can anyone help?
01-18-06, 02:12 PM
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Put a digital meter on the output wires of the primary injectors and see if there is a voltage drop on both when the engine is running vs the engine not running and the key to just ON.
OR, if you know how to install a cas, remove the cas but leave the electrical connector on it.
Disable the coils by pulling the small white plug off them. Turn the key to ON. Spin the gear at the bottom of the cas. You should hear the injectors clicking (primary). Which one is clicking? The front or the rear? Well disable the wire at the ECU that feeds the front one and repeat spinning the cas. Clicks? Then reattach the wire that feeds the front injector and now disable the rear primary and again spin the cas. Hear clicking? Then it ain't a ECU problem.
You'd disable the front or rear injector by depinning the wire at the ECU small plug for the given injector that your trying to disable. You pull a wire/pin out of the plug by looking into the mating side of the plug and with a small, small jewelers screwdriver, press to the middle of the plug the plastic tang that holds the wire in place, while simutaniously pulling on the wire.
Or you could get a LED from RadioShack and put a ground to one end. Then attach a wire to the other end of the LED and backprobe the given injector wire your interested in. Turn the key to start and when the engine spins the light should blink, more or less indicating the ECU is putting a ground on that given injector. Proves to me the ECU is good. How about you?
OR, if you know how to install a cas, remove the cas but leave the electrical connector on it.
Disable the coils by pulling the small white plug off them. Turn the key to ON. Spin the gear at the bottom of the cas. You should hear the injectors clicking (primary). Which one is clicking? The front or the rear? Well disable the wire at the ECU that feeds the front one and repeat spinning the cas. Clicks? Then reattach the wire that feeds the front injector and now disable the rear primary and again spin the cas. Hear clicking? Then it ain't a ECU problem.
You'd disable the front or rear injector by depinning the wire at the ECU small plug for the given injector that your trying to disable. You pull a wire/pin out of the plug by looking into the mating side of the plug and with a small, small jewelers screwdriver, press to the middle of the plug the plastic tang that holds the wire in place, while simutaniously pulling on the wire.
Or you could get a LED from RadioShack and put a ground to one end. Then attach a wire to the other end of the LED and backprobe the given injector wire your interested in. Turn the key to start and when the engine spins the light should blink, more or less indicating the ECU is putting a ground on that given injector. Proves to me the ECU is good. How about you?
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