240sx idle problems.

[greekdrifter]

hey guys im new to the hood can anybody tell me why my 89 240 wont idle or run smoothly????

[BMAR240SX]

Its a truck engine what do you expect what are your spec's

[greekdrifter]

stock i bought it from some dumbass redneck who butchered the damn thing

[BMAR240SX]

Pic's please and have you tried doing a tune up and getting it check out

[greekdrifter]

already did the tune up new plugs wires distributor everything including the damn vaccum hoses that he yanked

[BMAR240SX]

Injectors?

[greekdrifter]

maybe dut why can i still drive it like a bat out of hell on the hwy

[BMAR240SX]

Dude speak a little bit more professional having trouble understanding you there

[greekdrifter]

funny. the car still hit triple digits on the highway but can't seem to idle worth a damn

[BMAR240SX]

What does it idle at when it you turn it on?

[greekdrifter]

it starts at 1000 shoots up to 3000 then it dies,and thats even if it decides to start

[kaztnk89]

Im having the same problem with my 89 240.. It idles at 2000 and it jerks like crazy everytiem i slow down it jerks.. i jus posted it in another topic.. i didnt see this.

[greekdrifter]

what all have you treid on yours

[180fan]

you need to search for "240sx idle"

[madizmo]

I would suggest checking your o2 sensor first off cause that just fixed my idle and acceleration problem, when your in the high rpm's or at WOT the o2 isn't doing anything so thats probably why it fast on the highway. and for the weird idle check your tps and iacv.

[rogoman]

funny. the car still hit triple digits on the highway but can't seem to idle worth a damn

The problem with the idle that you're encountering could be the TPS system or the IAA adjustment. The first thing to check is the TPS harness connector pins. The connector is located on the passenger's side of the motor just above the throttle assembly. Look at the pins and see if there's oxidation on them. If so, clean them with fine steel wool then lightly coat them with 'dielectric lubricant' which you can get at most auto parts stores.

For a procedure on adjusting the TPS, go the http://www.240sx.org web site, FAQ section and look up 'Throttle Position Sensor SOHC'.

To adjust the IAA, Fully warm up the motor. Shut motor off. Disconnect the TPS harness connector. Start motor. Check the idle speed. It should read 650 RPM; If not, adjust the idle screw until you get 650 RPM. The idle screw is located on the passenger's side of the motor near the firewall below the intake manifold. Stop the motor. Reconnect the TPS harness connector. Start motor. The idle speed should now be 700 RPM.

As a side note, make sure the air filter is clean. If it's got 15,000 MI on it, replace it.

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Trouble shooting fast idle condition

If your engine continues to idle real high after it's warmed up, check the air regulator unit. It's located on the passenger side of the engine, below the intake manifold, near the rear. There's a hose connecting to it. Pinch the hose when you are having the high idle condition. If the idle speed drops, there's a problem with the unit. Also check the electrical ground connections on the engine for looseness and oxydation.

Another thing to check for is an intake vacuum leak somewhere along the intake plenum between the Air Flow Meter and the Throttle Valve. Check the bellows for cracks and all the nuts for tightness that fasten the intake system to the engine.

[BMAR240SX]

^^ Its people like him that know's there stuff and give a helping hand good shi* man

[greekdrifter]

i appreciate all the advice tomorrow morning im gonna check everything out . im also replacing my injectors i checked them today and #4 is blown im not sure how that happened but i think that might also have something to do with it
Modified by greekdrifter at 11:30 PM 12/16/2006

[greekdrifter]

ok this is the deal the maf is bad. thanks for all of the advice i did go ahead and changa out a lot of the other stuff

[zenkii]

you can get them MAF cheap at the "pick in pull", i suggest you to do a full tune up which would really help the ol g ka24e

tuneup: oil, oil filter,cap, rotor, plug,wire, fuel filter,air filter, o2 sensorif you got money: starter, fan belt, transmission oil

WARNING: never buy any BOSCH products

[greekdrifter]

the only plugs im putting in my car is probably going to be ngk. as far as the tune up stuff ive already done all of that im just having a hard time at the pick and pulls because everyone is taking the maf and selling them on ebay or other sites and im sorry but im just not going to buy something that i dont know for sure works with out a warranty

[sb]

Most good pick n pulls have a 30day money back gurentee, meaning if you pull the MAF take it home and it dosent work, you can take it back. Just keep the recipt.

You can find them in the classifieds on here as well a lot of the time. Someone is generally always parting out a car.

SB

[greekdrifter]

is there anyone(in georgia) out there that has some stock parts that they want to get rid of by any chance . right now im not looking for my 240 to be the ultimate car i just want it to run good and look good