clutch rev drop to idle

I have a 92' dodge stealth r/t non-turbo. a few weeks ago i was driving it and it cut off on me and wouldnt start back up. i towed it to a shop and they replaced the mfi relay and it fixed it. the only problem i am having now is that when i push in the clutch going down the road the rpm drops to about 200 and the car almost dies but then it goes back up to idle at about 500 or 600 rpm. it also cut off on me one time the rpm's dropped so low. i was wondering if anyone had this same problem and if you could tell me what it might be.
thanks,

Do you have a lightweight flywheel? That could cause issues like you describe. Maybe try to bump the idle up a hair to see if it cures it.

i had the same problem i just raised my idle up to 1000rpm and no more problem.

i dont have a lightweight flywheel. the only mods i have are FIPK, NGK iridium plugs, accel 8mm plug wires, took catalytic converter off and replaced with a glass pack and have straight pipe off of that into n1 muffler. i adjusted the idle and it doesnt do it as bad or as much but it still does it sometimes.

take a look at your MAS... that may be dirty... I had a similar problem after installing my cold-air intake... one of my hose clamps had busted during installation... I was driving down the road, hit a bump, and my intake blew-off... it was pulling air into the plenum and not through the MAS... that made the car run really bad, eat gas, cut off, run lean, etc... I made it home and popped the hood... found that the intake had popped off and replaced it... then car ran fine... thankfully my pistons didn't fry... as there was a lot of white smoke coming out of the tailpipes...

i bumped the idle up a little bit and it seems to do better but if i push the clutch in 1 or 2 gear the revs still drop down to about 300 rpm and then go back up to idle...i dont know if this is normal or if it is a sign of problems to come. i'm gonna take off my MAS tomorrow and clean it though i dont think this is the problem considering that it doesnt drop in higher gears, it wont hurt anything to clean it. its really not that big of a problem. the car doesnt cut off on me anymore since i bumped up the idle but i'm just worried that this may be a sign of problems to come. my car only has 64k miles on it and i just did the 60k mile tune-up. i just never had this problem before until the MFI relay went out and i had to replace it. i dont really think it is anything as serious as the ECU, i'm praying anyway because i'm broke right now. i can barely afford to keep gas in it. but if anyone else could offer some advice i would really appreciate it.

i wonder if maybe it could be the oxygen sensor...i didnt replace it in the 60k tune-up...should i replace it or would it even be the problem?

I've had 02 sensors go bad in other cars, most of the time that just made my car run very rich (eat gas) and lose hp... the other cars were low hp, non-performance vehicles though... there's always the possibility... you can take out the 02 sensor and examine it... if it looks all crudded up, there's a chance you can clean it. a friend of mine that's a mechanic told me to take an acetylene torch and heat the sensor until it's cherry red, and that supposedly burns off all that crud... there's always the possibility that the sensor just went bad and that no cleaning will help it though...

Sounds like it could be you IAC to me

True, I didn't even think to suggest that... thanks... when I mentioned earlier, a/b the intake blowing off on my vehicle... that frayed the wires on my IAT sensor (not IAC, the Intake Air Temperature Sensor)... what would be the effect on my engine?

IAC IAC IAC IAC IAC IAC

idle air control...buy one on Ebay to fix your problem.

If I'm correct the IAC is a little sensor on the back of the throttle body... there's an IAT on the front side of the throttle body called the IAT sensor... the sensor is fine, but the connector/wires are damaged... am I correct or have I been given wrong info... if you'd like I can post pics...

The IAC is directly under the TB, there's a TPS to the right of the TB...IAT idk.

That's right, I'm sorry... it'd help if I thought a/b what I was saying first...tps is connected to the butterfly on TB, and the IAC is underneath... though from lookin under the hood on I think the fron side of TB, there's a sensor, I was told IAT, and when the intake blew off, the wires were yanked out of the connector... I'll do some reading and tell you what I found... I was just hoping someone knew off the top of their head...

maybe if dont mind posting some pics. of where the IAC is. i looked but i didnt see where it might be. i really appreciate the help.

ok, I am sorry... I've worked on so many cars here lately I can't keep them all straight... the IAT is part of the MAS in these vehicles... The IAC is on the back/bottom of the Throttle Body... The TPS sensor if on the front... and that's what has been compromised... The wires to it... the IAT will do what I was describing... but that apparently is not the problem.. I may take a look at the MAS just to make sure it doesn't need to be replaced...

I shall take some pics after I get off work today... I will hopefully have them posted tonight or first thing in the morning... I'll search the web to see if I can find any pics...

nevermind....i found it...how much do you think a new IAC will cost me. i may get one off of ebay if i can find one or i may just go down to advanced auto parts and see if they can get one just because of convenience.

simply go to partsamerica.com (advance auto parts), and they will give you their price... look up your exact make, year, model, etc... they'll give you prices online... and tell you if your local store will have it in stock... be sure to check Autozone, and other retailers too... it's always best to shop around...

btw, it'll be listed under the fuel injection parts, idle control unit... the price for a 91, stealth base is $171~...

i got mine for $20 on ebay....off a talon, i believe their all the same on our cars and dsm...

that's true.... I do believe the DSMs run a lot of the same parts, IAC, MAS, TB, injectors...

dang if the thing didnt break down on me today. i was going down the road and the rpms dropped to 0 and then wnet back up and dropped again about five times and it cut off and wont crank back up. i know its electrical and something in the fuel delivery system more than likely....the mechanic said he has no clue until he can really take a look at it but the exact thing happend to it as i mentioned in the first post.
this is really startin to piss me off. i hate electrical bs.

I didnt reread everything but you may need to take a look at your ECU caps.

Well I was thinking IAC until you said it won't crank back up. It actually won't crank? If so then it's as simple as a loose battery cable.

But if you mean that it was cranking but not starting up, then I still think IAC. And in that case your best bet would be Ebay, DSM's use the same one. Advanced Auto Parts, Autozone, and Pep Boys around here all wanted $250 for a new one, got it for $50 on Ebay and works great.

Im agreeing with Twizted 3kgt...that kinda of what happned to me the day beofre i replaced mine, i wen to down shift and it just cut out... (bad timing to because i was a main road) it wouldnt start up at first hten it finally did but stalled as soon as i touched the clutch, i sat there for a little bit then it started but it didnt drive good again untill i changed the iac

its in a mechanic shop right now. hopefully they will figure out what is wrong with it. the starter will turn but the motor wont turn over. i was thinking it may be a short in a wire somewhere. i dont know. i'm fine with the motor but when it come down to all the electrical shit and transmissions and clutches i dont know anything. i was gonna go to uti and become a technician but i was like 400 miles away in orlando and it was very expensive and i am glad i didnt go cuz i would be stuck down in orlando right now with a broke car and no money to fix it.

i will talk to the mechanic about the IAC though and see what he thinks. the check engine light came on before it cut off so shouldnt he be able to get the codes?

what year is it... they can definitely get codes from it, but if it is pre OBDII then many places do not have a scanner that will work on your car... I think I am gonna have to agree with them... replace the IAC, and see what happens... good thing is, when the car died out, the ECU at least noticed something... I would suggest pulling the connectors off of your sensors, check all the wires, and make sure there's no debris in them, but most likely it will be the IAC...

another thing you might wanna try, unplug the MAS, and try to crank it... if it does crank, you may need a new MAS... if it runs, it will run like crap until you get a new one... but I had the same problem when I forgot to plug my MAS back in (installed clutch slave cylinder and intake, removed system)

its a 1st gen. r/t non-turbo. i would try the MAS thing if i had my car at the house. it just pisses me off not to know what is wrong with if. i hate all the damn sensors and shit they put in cars nowadays. its rediculous. they put all the sensors in there to make sure nothing tears up but look what happens...the damn sensors and shit tear up instead of the parts that the sensors are supposed to keep from tearing up. i believe they do it on purpose so that they break and you have to take it to a dealership to get it fixed and then they charge you an ass load to fix it.

I just believe that the EPA and all these other groups "trying to make the world a better place" f' stuff up... they really put too many restrictions and regulations on stuff... it's pretty hard to have an "environmentally friendly" sports car... or hp machine...

I think that there's always someone out there trying to make a dollar... and if they can sell the public that they are doing it bigger and better, then they get money... especially these "non-profit" organizations... if they're really not out for money... then why do they end up getting so much of it...

yea i know what you mean. non-profit organizations get money somewhere. if they didnt then how do they pay for tv commercials and get money to run the thing. i dont think there is a such thing as a non-profit organization.