flat spots when i put my foot in it.

[johnnyb87]

so I have a weird problem. I guess Ishould start with what I have. It is a 90 hatch 240sx with a ka24de and manual trans swap. I'm running a 93 harness and ecu.

Now the problem. when you first start it up,it runs awesome, revs cleanly, and has good pick up. But when it warms up it starts to cut off, like the injecters are cuting off or something. I replaced the tps and it idled much better and reved much cleaner. But it still cuts off a lil. about 1/3 throttle if I'm easy on it its fine. Could the tps need more adjusting? Could it be something else? Its driving me nuts!!!!!!!

ps. I searched........alot

[johnnyb87]

I guess a better eay of putting it is it doesn't like to accel when I prss the gas down more than 1/3rd

[sigsterrr]

Change your fuel filter. If that doesnt do it, change your fuel pump. I had similar problem and it was both.

[OutToWinPAHC]

Change your fuel filter. If that doesnt do it, change your fuel pump. I had similar problem and it was both.

Change your fuel filter, test pressure then dermine if it was just a filter or a regulator. You should also clean the IAC, change plugs, cap, and rotor. Time it, set the TPS, and give it a go

[OutToWinPAHC]

Could also be a miscalculation (MAF, TPS, o2) causing it to select the wrong section of the fuel map

[johnnyb87]

Change your fuel filter. If that doesnt do it, change your fuel pump. I had similar problem and it was both.

Change your fuel filter, test pressure then dermine if it was just a filter or a regulator. You should also clean the IAC, change plugs, cap, and rotor. Time it, set the TPS, and give it a go

Already timed it. New rotor, cap, plugs. Tomarrow or Friday I'm going to try this idea I have. I'm going test fuel presure when its running cold and warm. I'm going to do the same with the vaccum and spark. See what happens. It also could be a leaky intake manifold...the manifold cold be expanding cuasing a vacum leak when warm and under load...