View Full Version : Hope you know, rpm needle jumps and batt lite flickers on 4jh4e

01-17-2011, 10:29 AM
have check alt and connections but no luck,,,,do you know if the rpm is alt driven or fly wheel driven if fly wheel driven where can I find the spade connector in order to clean.

thanks much

01-20-2011, 05:56 AM
You should have the rpm sensor on the flywheel. I have the 4JH3-TE engine and that is where mine is located. Look at rear of engine and just above the transmission--near the top of the flywheel you should see the sensor--the sensor will be a screw-in type with a wire lead attached. You can slip the lead off and clean all the contacts. I would also check and clean, if not already done, all of the contacts on the back of the panel particularly those leading to the tach. I would also check/clean all battery connections and also the engine ground. I routinely clean contacts with sandpaper, CRC marine 656 or WD-40, and then apply anti-corrosive lube to contacts.