SR swap runs nicely for 3 seconds, then dies... violently.

[ctnewman]

I have an SR car that i did not swap. It used to run fairly well, then in about a 20 minute period it went from OK, to bad, to DEAD.

Specs:s13 coupes13 redtops13 ECUDOHC mafsSAFC set to 05/06, no other changesThe wiring on the car is not the best.The mafs wire is NOT shielded

Symptoms:Car starts. Idles alright. Not awesome, but fairly smoothIf you stab the gas, it will rev for a little bit, then just die.If you hold the throttle consistently at about 5% it will rev to about 2000-2500 sit there, perfectly smooth for 1... 2... 3... then just fall flat on it's face with NO change in input. It doesn't start to stumble, it just DIES. Like someone flipped a switch. Then the revs will obviously drop and then the motor shakes, shudders and stalls. This occurs with the mafs plugged in, or disconnected, but the engine sounds/feels different each time.

What it's not:I tried a different ignitor chip, no helpI tried new spark plugs, no help

Some thoughts:-I am trying to get my hands on another DOHC mafs. I don't think that's it, but it's worth a try. I also have a 300zx mafs, but do not have the pigtails for it.-I'm wondering if the problem occurs when the computer switches to closed loop, though i don't know how quickly it would do that... Can i just unplug the O2 sensor to lock it in open loop?-**** ECU?

Can anyone else perhaps shed some light on this here? I have very little free time to **** around with this car. Once i solve the problem, I am going to sell it.

Thanks!

[Alsontime]

Had a similar problem with a KA24DE. Turned out that the maf was bad. Switched it out and the car ran like a champ. I would clean the maf with maf cleaner, check your wiring, and voltages at the maf. Also check the input wire from the maf to the ecu, at the ecu.

[KnoxVegasS13]

I definitely think it is the MAF wiring. I had the same problem with mine, then I switched the grounds, give it a try.

[godzilla34]

DONT USE THE DOHC MAF!!!!!!!! the only maf that will work on the sr, is the ka24e, or the oem sr maf, something to deal with the sensor senders or somethin like that. that is the reason why its not running differently when its connected or disconnected, when you disconnect it, it is supposed to do as described, when connected runs like a champ. bro had the same prob, with his s13 sr blacktop. so he got rid of the problem by upgrading to the z32 maf