I must be a fukin moron! I can't fix my car...

[MarketPlayer]

Okay I first started working on my car, b/c it had a little black (not blue/grey/white) smoke comming out the exhaust when i went WOT, and my rev limiter was kicking in at 5000rpms.  I then went to discount auto parts and bought new wires/plugs/distributor cap/rotor thinking it would cure the blck smoke problem!  It didn't, So i went to the FAQ section and learned how to read codes, and it said that my MAF was bad or shorted.  I then talked to a tech at my work and he said that a crack in the intake piping after the MAF and before the throttle body would cause such a reading!
I then located the hole, and wrapted massive amounts of duct tape around it for a seal.  I can 99.999% garauntee that no air is getting through there now.  I then followed the resetting the ECU poste, and did the following.  Turned the little knob all the way to the right, with the ket set at the ON position, then started the car and turned the knob back to the left.
After all that, I tried to drive it and it was haveing great dificulty reving from idle to 2500rpms, and was blowing more black smoke than you could believe!  I then let it warm up for a little bit by revving it up and triing to let it idle by itself w/out stalling.  It was still having a trouble accelorating if the revs dropped below 1500, but pretty much ran ok after that!  But the rev limiter still wont let me go past 5000, and i am still blowing black smoke!

I am currently in the process of buying a used intake system and MAF for $60 +shipping. &nbsp;Does this sound like a good deal/good fix?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>??? &nbsp;If anyone has an opinion as to what could be causeing me all this trouble please post it, or if you can beat my deal on the intake please poste that as well! &nbsp;I am really getting tired of this shit, and is making me second guess my decision on purchasing a 240sx! &nbsp;Please please please help me out! &nbsp;I am so frustrated!

[nismoboy]

Ok im still a newbie but ive been readin the board for quite a while now , but neway , i dont think it was all that great an idea to put duct tape anywhere near ur engine or exhuast system , exhaust gasses r very hot and could have possibly melted the tape which would explain a lil of the extra smoke , and if the tape didnt melt, duct tape with heat will weaken in adhessiveness so air might be gettin in through that crack , i dont know wat its called but that heat insulation tape they use on turbos might help but since u have the new parts comin in that would PROBABLY fix ur prob

[S13Grl]

I gotta agree with the newbie <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>. Duct tape melts reeeeal easy. You should wait until your new MAF comes in, try and reset your check engine light again and that should solve it.

[sykikchimp]

My guess is your MAF is trash. &nbsp;Duct tape on the intake piping isn't gonna hurt anything. &nbsp;It doesn't get very hot at all. &nbsp;I suggest waiting till you get the new maf in before you start breaking stuff trying to fix the problem..

And buy an FSM.

[MarketPlayer]

Okay, can anyone w/ experience in resetting your ecu tell me if i am doing it right? &nbsp;I just tried filling up the tank w/ 87 octane instead of 93 like i was running, and then reset the ecu, and it made no difference. &nbsp;When i step on the gas when it is idling, it boggs down to like 400rpm then i have to floor it to keep it from stalling, and it blows mass amounts of black smoke. &nbsp;Someone has to be able to help me out. &nbsp;I was thinking, and if the crack in my intake pipping was making the MAF read wrong, then wouldn't the engine be leanning out instead of over rich? &nbsp;What kind of tools, do i need to check everything out? &nbsp;I want to get one of my techs at work to look at it, what should i have him look for? &nbsp;It is a ford dealership!

[danwagar]

could be excess carbon build up from running premium. &nbsp;how long have you been running it. &nbsp;well this can be solved there is this company called bg they make these chemicals and basically you run one can through the intake one can through the fuel rail and dump the other can inyour gas tank. &nbsp;after this it will clean up all your carbon and your car will smoke like a mo fo for about 10 min. &nbsp;after that it will run better than ever. &nbsp;this really works we use this at my work it is a gm dealership, many dealerships allover the country use bg stuff it is good.

[Powerzen2002]

I have a very similiar problem.

However, except for the rev limiting problem. &nbsp;Definately sounds like your in safe mode (ECU).

Every other time I start my car, the car will rev to about 1000 then down to 200, up and down. &nbsp;Sometimes shooting out black smoke (carbon) or what not. Even if I rev it - it will still go nearly to dead (100 rpms). &nbsp;I have to restart the car about 2 or 3 times to have it rev and start properly.

I dunno. &nbsp;Im thinkin about changing my PCV tomorrow.
Also, my exhaust. &nbsp;Can my exhuast do this? I know my exhaust is bad (my cat smells ... REEKS like sulfur).

[MarketPlayer]

I know what you mean...I used some of that engine additive stuff called "Z Max" and it totally cured my black smoke problem, and almost solved my engine bogging down problem! &nbsp;Now when i gradually push the gas it will rev like normal, but it i slam it down it will bog then rev up? &nbsp;It seems kind of funny to me that the exhaust could be causing this. &nbsp;BUt then again peopl ehave said that if you are having really jerky acceloration then it is caused by the exhaust being clogged. &nbsp;Can someone explain why this would make the engine jumpy?

[sykikchimp]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (Powerzen2002 @ June 03 2002,11:34)</td></tr><tr><td id="QUOTE">I dunno. Im thinkin about changing my PCV tomorrow.
Also, my exhaust. Can my exhuast do this? I know my exhaust is bad (my cat smells ... REEKS like sulfur).</td></tr></table><span id='postcolor'>
It reeks b/c your running rich. &nbsp;Safe mode causes this.

[sykikchimp]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (MarketPlayer @ June 04 2002,01:00)</td></tr><tr><td id="QUOTE">I know what you mean...I used some of that engine additive stuff called "Z Max" and it totally cured my black smoke problem, and almost solved my engine bogging down problem! Now when i gradually push the gas it will rev like normal, but it i slam it down it will bog then rev up? It seems kind of funny to me that the exhaust could be causing this. BUt then again peopl ehave said that if you are having really jerky acceloration then it is caused by the exhaust being clogged. Can someone explain why this would make the engine jumpy?</td></tr></table><span id='postcolor'>
It could make it jumpy due to excess backpressure. &nbsp;If the engine is unable to remove all the exhaust gas from the cylinder before the stroke cycle is over then it will have excess exhaust gas still in the chamber. &nbsp;See why this would be a problem?

[DuffMan]

Try putting a voltmeter across your MAFS to see what kind of voltages it will put out.

But yeah, the new intake/MAFS should solve the problem.

[geeaj]

Before I start replacing the MAFS, I would check the voltage on the circuit itself. Test the connector and the wire for continuity. More then likely tho, it is the MAF itself