Weird Problems (mafs?)

[Neejay]

My car sat for like a month, after ripped wires. I reconnected them, and when I start my car it puffs out black smoke every engine rotation it seems (like every half second). My ecu is giving code 12 (mafs), so I tried unplugging the mafs while the car was running, and the car runs fine for like 5 seconds then dies. I bought another mafs, but the same problem happens. I tried driving the car a little while and it seems I dont have power until like 2.5k rpms. My mafs is also sucking in A LOT of air I can hear it (cone filter), and the car is dumping fuel (hence the black smoke).

I was thinking its the wiring, but by unplugging the mafs and the car runs perfect...and after buying another mafs that looks cleaner than mine...I dont know what it could be. I also did a compression test and I got like 153 on all 4 cylinders.

ka24e

[s13sr20chris]

if your running rich then the circuits to test are for maf and temp sensor. try running an auxillary ground from the maf to the chassis or engine. high voltage drop along the ground will make the car dump gas.

[Neejay]

hmm...excuse my ignorance with electricity, but what do you mean by auxiliary ground from the mafs?

[s13sr20chris]

thats ok, sorry for typing over your head.just get some ring terminals for like $3 from pep boys and some wire. make two wires long enough to reach from maf to engine and maf to body. put ring terminals on the ends. then unbolt something and bolt back up with the ring under it. then do the same with the maf housing bolts. that is a minor thing. if you feel comfortable with it, you can splice the maf ground wire to the two aux grounds you just made as well.

[Neejay]

thats ok, sorry for typing over your head.just get some ring terminals for like $3 from pep boys and some wire. make two wires long enough to reach from maf to engine and maf to body. put ring terminals on the ends. then unbolt something and bolt back up with the ring under it. then do the same with the maf housing bolts. that is a minor thing. if you feel comfortable with it, you can splice the maf ground wire to the two aux grounds you just made as well.

Ah, ok, I'll try that. I think the problem may be the mafs ground. Theres these 2 wires (shileded pair) thats surrounded be these multiple silver wires that was ripped. I put the red and black ones back together, but the mutiple silver wires that was surrouding the red and black wires wont stay together and is kinda too short to reach each other. I was under the impression that the silver wires may be the ground.

[Neejay]

thats ok, sorry for typing over your head.just get some ring terminals for like $3 from pep boys and some wire. make two wires long enough to reach from maf to engine and maf to body. put ring terminals on the ends. then unbolt something and bolt back up with the ring under it. then do the same with the maf housing bolts. that is a minor thing. if you feel comfortable with it, you can splice the maf ground wire to the two aux grounds you just made as well.

Havent got a chance to try it until today, but do I have to have 2 seperate grounds from engine -> maf and maf -> chasis? Or would one just do.

[s13sr20chris]

shielding=important. the shielding itself is grounded but it is not the ground wire. one will do. i just favor redundancy in grounds.

[Neejay]

Yeah, all 3 wires were cut (including the shielding). I didnt get a chance to try it out because I didnt know which gauge wire to get. Heard to use 8, so I'll try it when I get a chance. But with the shielding being cut, will adding a ground wire to the maf help? Or should I try to reconnect the shielding as well? Its cut weird, and its gonna be a PITA to if I have to receonnct it.

[s13sr20chris]

first, do all your fixes with the batt disconnected. otherwise you could let the smoke out. the ground for maf is more important than the shielding but i would do it all at one time as it is all just wire repair. you know, once you are cutting and splicing you may as well do it all.

[Neejay]

first, do all your fixes with the batt disconnected. otherwise you could let the smoke out. the ground for maf is more important than the shielding but i would do it all at one time as it is all just wire repair. you know, once you are cutting and splicing you may as well do it all.

Unless I did something wrong, the ground didnt work. I have a cone filter and its sucking in a LOT of air. I dont know what else to try...sucks even more when you're broke. I cant afford to have it towed, and have a mechanic look at it. ****ing sucks.

[s13sr20chris]

check a junkyard. then you can get the wires and all too.

[Neejay]

Well, I I bought a second mafs already and it looks cleaner than mine (the actual sensor does). And I also have a sohc harness, but I dont think its the connector, because like I said when I disconnect the mafs, the car runs fine for like 5-10 seconds. Guess it wouldnt hurt to try...I guess...

[s13sr20chris]

yeah, but i dont want to tell you to spend money if you dont have to. still, the only thing i can say is that it really seems like a maf prob. maybe jumped time but thats a stretch if the motor is sucking a lot of air.

[Neejay]

Yeah, the extra sohc maf was a waste of money, still didnt work and is doing the same thing. Gotta be wiring...I wasnt having this problem until the wires got messed up. Could cut shielding cause this much hassle? The cut shielding is the only thing I see that looks wrong. Like I said, ecu is saying code 12 - mafs. When I unplug the mafs (after trying them both), the car seems to run fine, then of course dies after like 5 seconds.

Anyone else want to take a shot at it?