I have finally got round to replacing my throttle position sensor, the car now runs really smooth, except for every once in a while. All of a sudden the throttle will go from being extremely sensitive to an almost switch, power is either on or off. After a little while it soon sorts itself back out (or if I set cruise control).

 

Have I replaced it with yet another faulty tps, I should try and clean connectors, what is the best way to do this?

 

Thanks, Dan

Have u set it to around 0.45v closed throttle, u need a volt meter or if I remember rightly u can use consult..

It will do lots of crazy things if u haven't.

LOL no I havnt, I just adjusted it to where it smoothed out, how do I do this? thanks

hi bud i had same prob

see this link

http://www.300zx.co.uk/forums/showthread.php?165358-idle-speed&highlight=rough+idle

 

if u open some of the links on this thread will bee very helpful just read all the threads in the post

particulrly groovers reply no13

Edited April 5, 201312 yr by spritley56

Have u got consult or a volt meter..

 

Its been a while so trying to remember lol, know when im looking at it but I'll try remember and explain...I think...

 

With a volt meter put it on so it reads voltage, put it across battery car running should be around 14v.

So u know volt meters working right.

 

Theres 2 plugs on tps u want the plug that doesn't plug directly into tps, the one u want has wires both sides, god im crap at explaining lol.

 

Put black lead of volt meter on battery (-) and red lead of volt meter in the middle hole/wire of the plug.

 

Ignition on and u should have a voltage on the screen, open/shut the throttle voltage should go up and down.

 

The 2 little bolts on side of tps loosen them a little move tps to u get 0.45v and lock it up.

 

I normally snap the throttle open and let it shut quite hard and make sure voltage is still reading 0.45v.

 

Or consult/diagnostics should just show up on live data,

 

Sorry im crap at explaining and sure someone will be along and explain better.

You can do it by ear and get it spot on, in case you don't have Consult or a volt meter :laugh:

You can do it by ear and get it spot on, in case you don't have Consult or a volt meter :laugh:

 

ahhh the buzzin sound from gearbox;)

Ok so today I got the car up to temp and switched ignition on, unplugged GPS and measured voltage from the middle pin-I got a consistent 2.4 volts!? What am I doing wrong?

did u manage to read the thread i left u

Yes thanks mate, gone and let my battery die in my volt meter so will try again tomorrow