Shaking while idle..

[Wrd_32]

My 1995 240sx seems to shake a good bit while im stopped at a red light or whenever I'm at idling speeds.. Anyone know the cause?

[imjoe]

could be worn mounts... i'd check them first

[leveloneae86]

we need more info. does it stop roght after? is it consistent as in does it do that everytime you stop? it could be alot of things causing your car to bog.

[liquid_cool]

does your engine have modifications?...the more extreem the engine mod/the more you will shake at idle..do you have racing motor mounts..ie hard mounts..that will do it allso...need alot more info to help ya bro.

[Wrd_32]

It doesnt do it everytime.. Seems like it mostly does it on hot days after its been running for a little bit. I have no mods.. It also seems to shake in the mornings but its more of a stop and start kind of shake nothing consistent.

[liquid_cool]

are your vacume lines rotted out man?..you might have a vacumline leaking at start up for the butterfly's on your intake manny..might be choking you out..thats all i can think of except the motor mounts..

[TuRbOS13]

Hey man i had the same problem, I took apart the mass air flow sensor n wiped it off.....runs good now! U could always get it hooked up to a comp at a repair shop n they can let u know.

[nismoracingsx]

you physically wiped your maf sensor?

[Ka24de240sxS13]

yeah, that kinda threw me off too seeing as how your not supposed to touch it with anything because it's so delicate. Your just supposed to spray it with maf cleaner, and let it dry...

how the hell would you wipe it off anyway?

[chargerucd]

At what RPM does it idle?

I have the same problem, but I have the IAV messed up (or so it seems) because i have an idle of about 1100. I Still need to look further.

[CityHunt3R]

yeah, that kinda threw me off too seeing as how your not supposed to touch it with anything because it's so delicate. Your just supposed to spray it with maf cleaner, and let it dry...

how the hell would you wipe it off anyway?

@

hahahahahahahah

good thing i kept reading i was going to do the same thing he did.... MAF cleaner huh....

[TuRbOS13]

1989-1994 240sx: MAF problems tutorial 2:35 AM 5/31/2007

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work-in-progress

MAF cleaning:

"Avoid using solvents that leave residues: like the aromatics [toluene, xylene]. Use electrical parts cleaner or Windex and a Q-tip to gently scrub the wires clean. Acetone, methelyene chloride or chloroform will also work well. (NOTE: It has been said that carburetor cleaner is too harsh to use).Note: The Q-tip method is recommended only when the sensor wires are really dirty and simply spraying cleaner on them will not clean them. Be very careful when using a Q-tip! Use a Q-tip and gently scrub the wires.

If the MAF wires are not really dirty you shouldn't need to use a Q-tip. Just spray the wires and let dry. If there is still gunk on them - use a q-tip to clean them. If you break a wire you are screwed. Do NOT scrape with anything. " by Rogoman

MAF testing(for the proceeding test , the maf is connected to ecu so you have to pull back rubber part at connector and insert tester probe)1.Warm engine2. with engine off and ignition in ON position, test between terminal 1and ground . should read .2 volts3.with engine on at idle, it should be 1-1.4 volts

There are 4 terminals on the plug 4 3 2 1-----------------------------------------------------------------------------

Another thing thats really important here is check that ground on your MAF make sure it is under .2 volts drop to ground