*URGENT* car is dieng!!!!

[NMS1lvi4]

alright well here's the specs on the car

1991 hatchback 168,xxx miles, manual
the engine starts up right away every time
it also idles at a normal level (around 600-700)

but recently i'll be driving along, come to a stoplight or sign and i'll hit the clutch put it in neutral drop out the clutch the engine revs down but then it will either go all the way down and kill or it will go almost all the way down and bounce around and then die and i can't figure out what's wrong any input is appreciated.

[usdm180sx]

Mine did that as well. I bought some carb cleaner and shot it into the aicv in the intake tube. Doesn't do it anymore.

[NMS1lvi4]

hmmm why do u think that cured it?

oh and could you refresh my memory on the aicv why that would do it?

[SpeedMonkeyInc]

I idle air control valve can get dirty and stick closed, so the engine won't have enough air to idle and die. Shooting some carb cleaner down there can be all it needs to get un-stuck again.

[NMS1lvi4]

is that the second to the largest one going to the intake mani?

[SpeedMonkeyInc]

Originally Posted by s1lv14

is that the second to the largest one going to the intake mani?

Huh?

Look at your air intake, you will see a hose roughly 3/4 inch in diamater going to a spot just above your throttle body. Thats what you are looking for.

[NMS1lvi4]

oohhhh the one alot of people put breather filters on that goes to the valve cover right?

[SpeedMonkeyInc]

Right. The valve cover line is tee-ed off from the IACV line, or it was that way when I put in an Ijen intake. That was so long ago that I can't remember what the stock configuration looks like.
Side note: The valve cover breather is not the best idea. It won't hurt anything, but your engine likes vacuum there.

[Ess14]

theres also 5 dozen threads with this exact same scenario you could look at...

[NMS1lvi4]

/\sorry anyways thanks to all who contributed that was it

all contributers received posi rep

[NIK90s13]

Also check for vacume leaks, thats what I ran in to in the same situeation.

[i8yourfwd]

I had the same problem.. it was as simple as cleaning the dirt off the connecter to the MAF... Fixed my problem AND worked for my friend's car too... sound stupidly easy.. but it worked twice..

[koukidough]

carb cleaner added me an extra 1/2 mile a gallon. Definitely worth the $2-3 bucks it costs.

[Ess14]

well silv did you get it fixed?

[NMS1lvi4]

hmmm i thought that was it but it's starting to die again how do u clean the dirt off the maf? clean it off what part of the maf? the inside i'm assuming but i have to rev it up at stoplights to keep it from dieng, very very annoying and i look like a nublet when it dies going up to a light lol

[smithers584]

if you want to clean your maf, then you need to take it off and spray some cleaner on the heating element inside thats hanging down, youll know it when you see it. just let it dry though before running it again, dont try drying it with anything because you are liable to break it. If you want an awesome cheap way to find vacumm leaks, go to home depot and get a piece of PVC with one threaded end. then get the insert that threads into, it will be right next to it in the store, take a schrader valve like on a tire, and drill a hole into the PVC big enough to fit the valve in. then seal it and hook it up to your intake with a coupler you can find in the same place at the store. then run about 20psi through it from an air compressor with your motor off, no more or else you might damage the valves and what not, and open your throttle body manualy, this will pressurize your intake mani and every vacumm line off it. i am having the same problem, until i did this. and i have done everything else. hope that helps, its nice because your motor will be off and you can hear the leak very well and it makes it easy to pin point. cost like ten bucks to do.

[ranisron]

keyboard cleaner and blow it through the MAF.

also the connection on MAF sensor is important.

[speedstar01]

Originally Posted by ranisron

keyboard cleaner and blow it through the MAF.

also the connection on MAF sensor is important.

can i use throttle body cleaner and/or carburetor cleaer on the connection to the MAF sensor?

[EchoOfSilence]

yes, that would be better.

[speedstar01]

thanks for speedy reply bud (EchoOfSilence) i love this forum!

[NMS1lvi4]

well i sprayed the MAF with carb cleaner and let it dry for 15 took it out and hasn't died yet. although it seems to be idling a tad bit high no major issues yet. i'll let ya know

[sittinsideways]

my car is an auto but it does the same thing. gunna get some carb cleaner and check 4 vacume leaks.

smithers584 have any pics of the contraption ur talkin bout. i'm havin a hard time visualizing it. thanx

[smithers584]

here you go dude, just use a pump or air compressor on it.

http://www.zilvia.net/f/showthread.php?t=106184