Rep Power: 0

Tc's Po101 P1120 P1220 P1516 Right Now
Before P0300 Also 3 Of My O2 Sensors Tripped A Code At One Point In Time....... But I Erased These Codes...
Car Is Barely Running.. Cleaned Maf Sensor Last Night. Still Running Horribly. Missfires When Accelerating.. Only Willl Accelerate When Givin Very Little Gas....

2000 3.8 55,000 MILES

Freeze Frame

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reason for freeze frame throttle pos
rpm 2492 57mph
load value 17.5%
air flow rate 22.54 gr/sec
map sensor 64
coolant temp 194
short term fuel trim1 0.0%
long term1 15.6%
short term fuel trim2 0.8%
long term2 17.1%
short3 50.0%
long3 92.1%
short4 -89.7%
long4 53.9%
fuel system 1 and 2 closed

bought the car 20,000 miles ago.. only thing i've done is change oil and top of all the fluids.. I looked at the wires last night with the lights off in the garage couldnt see any grounding out.. going to napa right now to get new plugs and wires.. I have a k&n. I read some where the oil in these messes with the maf. I cleaned the maf last night with maf cleaner.

 
Rep Power: 778

Maf cleaner cant fix a broken MAF sensor. I wrote a response on a thread about how to check your MAF electronically, search for it.

You can also just have the car idling and take out the plug to the MAF and see what happens. Obviously if the misfiring gets worse, its 'probably' not the issue. It could be numerous other things though with the codes your giving me.

 
Rep Power: 0

10-4... couldnt find your write up on electronically testing it.. If it is the maf do u see anything wrong with going and getting a couple maf's out of a junk yard??? right now I'm going to unplug the MAF drive to pick up the new plugs and wires checking to see if there's any improved performance...

 
Rep Power: 659

Junkyards, you get what you pay for. Somethings may work others dont. If the junkyard MAF solves the problem then cool but if not now you will be wondering if the junkyard MAF is toast. One way of testing is doing the tap test. If you tap with a screwdriver handle and it stumbles or dies, its the maf. Also volt meter tests work. The true way to test MAF, O2 sensors etc is with a oscilloscope. Sometimes you can get the proper readings on the volt meter but the signal is messed and the computer will pick up the messed signal.