shaking and idle's low

[GrEy240SX]

Well..my 90 240sx is shaking when its idle. plus when it is at idle the rpm's is at like 100-300 which is really low. and today when i stopped at a red light the car shook alot and rpms at 100 and then it died on me. The battery light is on in my dash so i probably need a new alternator cuz the belts were fine when i checked. If i changed the oil, new alternator, and maybe battery and spark plugs..should this solve my problem?

[UncleBen]

definately wouldn't hurt a bit. might as well do an entire tune up.

[Syntax360]

low idle because of alternator? doubtful....my alt went out and the car was idling high as it was dying.....mine used to do similar things because it was (and still is :-\) running rich.......get a fuel pressure reading and see if that's nominal. I replaced my FPR, O2 Sensor, and plugs and it did wonders for awhile......prolly cost ya $150, but couldn't hurt anything but ur wallet :-P

[nissanrcer240]

Well..my 90 240sx is shaking when its idle. plus when it is at idle the rpm's is at like 100-300 which is really low. and today when i stopped at a red light the car shook alot and rpms at 100 and then it died on me. The battery light is on in my dash so i probably need a new alternator cuz the belts were fine when i checked. If i changed the oil, new alternator, and maybe battery and spark plugs..should this solve my problem?

i have the EXACT same problem with my 240, i never got it fixed but i was told that it was the AAC/ACC (forgot which one) valve...i think it was AAC valve, anyone feel free to correct me;) ....when you do get it figured out and/or fixed be sure to let me know

[GrEy240SX]

where's the AAC/ACC valve at? i'll have to check that to see if that's it.

[nissanrcer240]

this should help you out:

click here

[GrEy240SX]

haha thanks. so should i replace that?

[GrEy240SX]

or make sure it's on right?

[nissanrcer240]

i guess you just gota clean it

[89240sx]

could his tps also cause something like this? or mafs?

[krazy skwerel]

i got a tear in my intake piping boot (for lack of a better term) and thats messing up my air/fuel mix and it is doing all that jive of low idle running rich.