I have 1999 Jeep wrangler with Approx. 90,000 miles. I've recently noticed that I have to crank the engine longer before the engine starts when the engine is cold. I also had the check engine light come on approx. 4 months ago while driving on the highway.Had local mechanic Read code he said it was A TPS problem and reset set code. Could the hard start problem be related to the Throttle Position Sensor. If so how hard is this sensor to replace for a novice mechanic? Please help
Hard Starting on 1999 Jeep Wrangler
by rickjeep in Carmel, NY on November 14, 2010
2 answers 2 comments
ANSWER by mastertech6371 on November 14, 2010
it could be if the reading is very high. above 4.5 volts goes into clear flood mode and shuts off fuel for a bit to clear out the cylinders of fuel. the tps unbolts from the side of the throttle body and is tight to get to. it needs to be set when you are done and needs a scan tool from a shop to do this. remmeber, the code number does not mean the part is bad, just the system that has a problem. Roy
Thanks for your quick reply
ANSWER by delane 72 garage and body shop on November 14, 2010
not hard it is on side of throd body shood be like 2 screws hold it on then clear code in computer
155000 miles, ran fine until it started too backfire when driving and now hard starting. changed fuel filter, and new spark plugs,wires,rotor and cap.
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