Maf wiring gremlins... Need some Input ASAP!

[driftin_sr20det]

Alright here is the deal, I go and remove my system yesterday. I unplugged the battery so I didn't get shocked to ****, put everything back the way it was and the next morning the car wouldn't start. I finally got it going but it wouldn't idle. I checked the ecu and got a code 12, MAF sensor. I go to check it with a multimeter and when I go to test the voltage to the ecu (black and white wire, right) with the all black wire it shorts and I hear a click and something running. Sounds like the ACC turning on, a click from the box next to the Maf and I swear I hear the fuel rail making noises like the pump gets turned on. And sparks upon contact. This is my only car and I'm about to pull the harness apart trying to find what the hell is going on. So if anyone has any idea's it would be greatly appreciated. Thanks

[da40]

???tyr moving the maf around i had turned mine once just cleaning and it ended up facing another direction and the car ended up not starting then it would but started to sputer ,i then moved the mafs around(actually facing up instead on down)and it work like normal those mafs are very very senstive check that first man ...good luck

[S13FASTBACKSR]

first of all what do you mean you removed your system? what system the maf? and if your ecu through you a code 12 then i guess your maf is bad. but first try what da40 said. if that doesnt do anything unplug your maf and try reving past 2500rpm. if you can then you have a bad maf. also yes the black and white wire is power but it must be going to pin e on your maf. assuming you have a 300zx maf

[da40]

+1 for S13FASTBACKSR

[S13FASTBACKSR]

haha +1 for da40 for +1'ing me..but ya let us know driftin_sr20det what you found out after you check out those things. I know how it feels to have your only car not running right.

[driftin_sr20det]

Sorry not enough information for you guys! s13 redtop w/ka24e maf. And I've gone through all the steps to make sure that its a maf problem. Unplugged it, 2.5K rev limit, I basically know the drill and have done it. When I went through all the obvious steps I go to check to see if its a wiring issue and check the voltage and when I check the black with white strip it sparks and turns on the accessories. Now that I don't think is supposed to happen. Thats going back to the ecu right, does that mean the ecu is bad?

[S13FASTBACKSR]

i may be wrong but wouldnt a sr maf be capable of holding more hp than a ka24e? to tell if your ecu is shot turn the key on. you already know about the red l.e.d. but anyways that should be on when the key is on. now start the engine. if the l.e.d. stays on then you have a bad computer.

[driftin_sr20det]

OH and I was uninstalling my stereo system, not the maf. I was going to take my trunk off and weld up the holes in it at my work, and I didn't want my stuff getting ripped off.

[driftin_sr20det]

Thanks S13FASTBACKSR, the red light didn't turn off when the engine was running. That sucks some serious balls though, it was an Access tuned ECU too. Saved me alot of trouble I guess. But do you think that short could have caused its failure?

[S13FASTBACKSR]

I suppose. Are you sure that the maf when unplugged doesnt rev past 2500 rpm? I dont know why you got that spark when checking voltage though..are you sure you did it right?

[driftin_sr20det]

Yeah, I've had to check the MAF signals before. When I first did the swap my original SR maf was bunk and thats why I'm using the ka24e one. With the maf plugged in, it would would sometimes only rev to 2.5k and then out of nowhere rev as high as it needed to. And it also did this with the maf unplugged, sometimes rev to only 2.5k and then rev to limit. It's gotta be the ecu. I also read in another thread that the maf part of the ecu is often what goes bad also. But, until I get that other ECU there is no way of telling. There probably isn't another SR powered car for 75 miles, so I got no one to help me.