Hey im working on a buddies truck('93 PickUp) that has a '00 taco 3.4 installed, and passed by the refs out here in California.The truck was running well but kept burning out MAFs due to the use of a K&N filter/intake combo.I swapped the aftermarket parts for OE today and here is where my problems began.1)the battery was disconnected, 2)junkyard MAF, 3)"custom" emission routing of aftermarket intake. I installed the factory parts and fired the truck up.it ran fine but the checkengine light was still illuminated.I didnt have my scantool, so i pulled the 20A ecu fuse at the drivers kick panel.Remember this is a '93 pickup that originally came with a 3vze.The light stayed on.So the battery was disconnected,OOPS!. The truck wouldnt crank on the first pull,stuttered on the 2nd,3rd,4th.when i can get it to run i have to pump the gas like a carbureted vehichle.it runs better at higher rpms,but is missing or somewhat off.At low rpms it just falters and coughs.I've been searching for a way to relearn the ecu,and reprogram the various modes.Does anyone have any ideas or info??

 

Its hard to pin point without knowing what the codes are. Pics of setup under the hood? Maf would not burn out because of the k&n filter/intake. It could get dirty with oil, but won't burn out. What year maf did you get from the junk yard?

 

MAF was out of a '00.i dont have an underhood pic at the moment.I am kinda lost as to why it would run great up until the battery was disconnected. All i can figure is that the ecu needs to relearn itself.I have just began working on this rig but the owner said he has replaced several MAF's over the past few years.the truck sees 90% of its time in thick dusty conditions,and the old MAF had a nice mud coating,but it did run and drive.Now it barely will even run, and driving is not happening.