89 240sx problems....help if you can

[timtiminy]

okay so i have searched and have not found what i am looking for, hopefully someone has dealt with this and found the cause and can help me, here it goes..
Question #1: i was driving home and after getting gas look down and the tach and temp guage wasnt working, but they were minutes earlier thats the weird thing... any answers to what it might be..what i can check?
Question #2 then another problem, it feels as if fuel pump shuts off every once in a while when driving after car warms up, basically will be driving along fine then no power at all, I think it may be the fuel pump if not then do you have any suggestions?
completely stock 1989 240sx, ka24e

[sideview_180sx]

search on here to find answers and similar problems you are experiencing, and how to diagnose it yourself and pinpoint it closer to what you are describing.

IE: if it were your fuel pump, the car would stall, or bog heavily. For the guages, check your wiring.

[timtiminy]

okay so i figured that the tach and temp guages not working is electrical...where should i start, is there a fuse that controls that side of the guage cluster labeled under something else? exampla my friend has a bmw and he said his speedo shares the same fuse as his brake lights, or something along those lines. the stumble will only happen when im accelerating and the car is warmed up, basically ill be going along fine then the car just dies, cuts out, press the gas and nothing, so i am thinking etiher ignition or fuel.. Ill be checking everything that i can think of off the top of my head but this is my first experience with a 240sx. I also dont have a service manual so that doesnt help me any.

[timtiminy]

within the next week i will probably get spark plugs, spark plug wires, distributor cap and rotor, fuel filter, and oxygen sensor. see if that helps any with the cut out, basically feels like you hit the speed governor but going like 45mph..only happens when accelerating harder. as for the guages...i remember hearing some clicking under the dash area, but didnt think anything of it. perhaps a relay for those guages went out?? does anyone have a wiring diagram for the guage cluster? thanks

[timtiminy]

can someone answer me this... on the ecu there is the main harness on the other side fron the diagnositc lights. there is another harness. on my car this harness is not plugged in to anything, i couldnt find anything for it to plug into, is this what is causing my tach and temp guage to not work, is it suppose to be plugged into something, i noticed it right befor i left for my sisters house so i guess ill have to look better when i get the chance either tonight or tomorrow morning. please let me know if you know anything

[timtiminy]

just to let everyone know..i figured out all the problems except my power steering doesnt hold fluid so that is my next endevour.