Nissan Repair: Nissan FB 14 accelator problem, accelator, throttle plate

Question
QUESTION: mine is 1997 Nissan FB 14 auto transmission. when press accelerator sometimes the pedal wont go down.its very hard and has to press hard.then only it goes down.it happen not at cold start. it happens only after a continuous running over 50 K.M. once the pedal goes down, then its smooth.only hard at top.

ANSWER: Mathies,

You need to disconenct the throttle cable from the engine and check for actuation.  Sounds like the cable has a rough spot and eventually, it is going to break.  You might get away with lubrication but probably you will need a new cable.

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QUESTION: i lubricate the cable, then the problem was less but came again. so i changed the whole throttle cable. still the problem is there. But i didn't lubricate the new cable. Will it be OK if lubricate it?

Answer
Mathies,

If you replaced the cable and you still have a hard spot lubricate the new cable.  Also, check for proper actuation of the throttle plate and the pedal assembly.  I had a Corvette that I worked on that the throttle feed (pedal) actually break where the pivot point was.  So, you should check and lubricate that too.