Help me O Bei One, 240sx problem

[crave209]

K you guys are my last line of help here.

I have an 89 240sx, KA24E engine. It does the sputter and hesitating thing around 2000 RPMs. And maybe here is an new one to add to this. When I start it up the speedometer (digital) will start jumping from 0 to 2 to 6 to 2 and so on. Also when I put the timing light on it it is were it suppose to be, until I rev the engine then it jumps, but comes back ones it is idle.

I have rebuilt the engine completely, new pistons, head, timing chain, cam sproket, almost everything new. I have aligned all the marks and made sure it was timed properly, well to the best of my knowledge. New vaccum hoses and triple checked for leaks and misplaced hoses.

This one has me stumped. I am to the point that if I cannot fix it with spending less then $300, the car is going up for sale. It runs and most of the time it doesn't do that, but for some reason it has done this constantly for the last three weeks.

HELP!

[NISTECH]

the timing is suppose to advance when you accelerate ,that is normal. speedo is probably interference. does it do it only while cranking? the sputter check tps switch setting, check air flow meter connections.

[crave209]

How would one go about checking the TPS setting?