IACV Valve clean problem. Seems like getting no gas. Please Help!

[schanne]

I'm such a dumbass! I should of just left it alone. I used just about a whole can of carb cleaner (gumout) in the iacv valve. car was really hard to start, however now it sputters so bad. The a/f gauge leans out and engine shakes, sputters when its reving at like 2000 rpm and i give just a little bit more accel and it drops. Does it need to back fire? What the hell is going on and what can i do? I need to be able to drive to work in the am! Some one help?

[bgsr240]

Does it idle properly? Is it possible that you could of got the idle screw out of adjustment while cleaning? Play with the little plastic screw located on the vavle and see if that helps any.

[schanne]

It's not just playing with the valve. It idles fine, but when you try to rev it it bogs down. The car will rev up to 2300rpm and stays there fine but once you accelerate a lil bit more the rpms drop and the a/f gauge shows its leaning all the way( no fuel). When I try to drive in first the car will slowly climb up to 2000 then it shakes and leans out and i'll shift into 2nd and it will be fine untill i get to 2200. I'll shift into third and same thing. What i think went wrong is that i tryed to clean the iavc valve with the gumout. It loosened up everything and now its clogged. So what the hell do i do?

[carbully]

Hmm. Do you have a boost gauge? If so, does it read boost when you open the throttle and hold it, or does it drop to 0?

[carbully]

might pull the spark plugs and see if you blew a bunch of carbon throught the intake and it stuck on them. Easy to check them and clean them with the rest of your Gumout!

[schanne]

It stays in vacum. when i force the accel. it sound like it will blow up or something.

[carbully]

It's just strange that everyone was all thumbs up about that procedure on that post, and it causes you such problems!

Possible you might have bumped a wiring connector that had a loose connection, or a vacuum hose or something?

Would you say that the car shakes like it is missing on a cylinder? There has to be something we are missing here. I am an ASE certified technician, but do not know 240's very well. (joined NICO to learn more about them so I can buy one with an SR or RB)

[chicos240]

Sounds like Your MAF is malfunctioning. Because it stops the engine from revving past 2300 when its wet or malfunctions.To adjust idle.Turn off carDisconnect TPS.Adjust Idle.turn off car.re connect tps.Turn on car.

[schanne]

I'm going to go see if I have the right tools to go check the spark plugs. Maybe it is the cylinder missing from the spark plug. What do I want to look for when I have the spark plugs out. What else should I check while I'm there? Thanx for all your help so far!

You'll have fun owning a 240 with an sr or rb. Good thing your a mechanic! It'll come in handy. I'm trying to learn everything as I go.

[chicos240]

Thats one way to clean the valve. Best bet is to take the thjing off and just soak it in seafoam or simplegreen for a few hours, dry it and install.

[carbully]

Sure there is no wa

Thats one way to clean the valve. Best bet is to take the thjing off and just soak it in seafoam or simplegreen for a few hours, dry it and install.

you could have accidently bumped on the MAF wiring or tubing to your IC or MAF??

On the plugs, any problem that would cause something like this should be pretty obvious. Look for dark black paste-like gunk or little chunks of stuff, expecially that might be stuck in the gap of the spark plug. Carbon conducts electricity well enough to short out the spark plug, so the spark does not jump across the gap but instead just flows through any carbon peices that might be bridging the gap. Blast them all clean with your gumout, then dry them carefully off before reinstalling them. I like to use my propane torch to dry them off after cleaning them, which burns off any last carbon residue, but that's probably not needed as long as they are clean and dry when you reinstall.

[schanne]

I'm trying to get the first spark plug out and it is tight as hell. I'm not thinking thats good...

[chicos240]

Gentle sentimental,Wait till the engine is cold to let the aluminum contract.

[schanne]

OK, all spark plugs are out. There all black and deff. smell like carbon. When I looked into the spark plug holes, thers is a lil residue and very small black pieces. What should I do about that? And mean while I'm going to go clean the spark plugs. By the way, what should they be gapped to? And how would I check if I did mess up any other wires? I don't see any thing wrong, but I wiil take pics of anything if someone would like.

[chicos240]

about .30what kind of plugs?Can you get a shopvac nozzle in there?Vacuum it out, clean your plugs and try again

[schanne]

can i spray the gum out in there or no?

[schanne]

and the plugs are about .34

[chicos240]

dude, put the can of gum out down.WHat type of plugs?

[schanne]

Ok, all spark plugs cleaned and put back in. starts right up but with same problem. What else can I do? All help would be greatly appreiciated!

[schanne]

LOL, its put away! NGK Iradium

[chicos240]

Turn off car.Unplug MAFturn car on.REV, does it cut out at same spot?

[chicos240]

Ok...good you can read the brand!!!Now what model are they?6eix 7eix or 8eix

[schanne]

That didn't work

[schanne]

sorry i didn't see any model on them. wasn't thinking

[chicos240]

did the rev cut out at the same level when you unplugged the MAF?

[schanne]

Yes at the same level. I just doubled checked.... What now? And thanx for all the help so far bro!

[carbully]

(by unplugging the MAF wiring you force the ECM to calculate a "limp-in" MAF reading based on other sensor readings. If the MAF reading is bad, the car should run a lot better with it unplugged).

[chicos240]

well, that tells me its the maf, cause its not making a diff plugged or unplugged.Do you have any codes ie is the Check engine light coming on?If all you did was clean out the valve. I have heard that unplugging the battery for an hour or so clears the ECU, any chance you can unplug the battery for an hour or so?Also, have you tried unplugging your tps and revving?

[carbully]

Chicos, he was doing this IACV cleaning described here when this problem started for him: zerothread/251731

Are we even sure that this part is the IACV?

[chicos240]

Corey240 is good and he has a lot of experience.Im sure the problem may be the whole bottle of Gum out or something he might have done by accident. Things happen