After driving mybe 40mins the cars speed drops down to 25mph and won't go any faster. I've had two sensors put on the transmission
SOURCE: What is size of replacement battery for 2000 sonata v6?
Size 75 was the standard battery many of the newer size 75's are actually stronger than the old 78's, so you can probably get away with a 75 which is a little smaller and lighter.
SOURCE: 2000 Hyundai Sonata jerking and causing poor performance
The turbine shaft speed sensor can cause this problem, It is also know as the transmission input shaft speed sensor. It will cause the transmission to **** and also stick in 3rd gear, which wound cause slow acceleration.
SOURCE: 2000 sonata check engine lite came on,
The output speed sensor is located on top of the transmission output shaft, this will send speed value to the transmission control module (TCM).
The vehicle speed sensor is installed on the differential of the transmission, and sends speed value to speed gauge on instrument cluster.
Check also IAC valve and look for vacuum leaks using an hand tool gauge(Vacuum Gauge and Fuel Pump Pressure).
SOURCE: I have a 2000 hyundai Sonata, 6 cylinder eng. My
The sensor is located on the left hand rear side of the block (near the bell housing). It is held in place by a 10mm bolt. It's to the right of the exhaust manifold (LH - radiator side) on the V6. Once you purchase the new sensor you'll be able to identify it on the engine. The connector to this sensor is located in the illustration.
A word to the wise... replace the O2 snsr as well.
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