5 CEL Codes, Misfires

[ikeepblowingengines]

i drive a 1996 GT, 5MT

ive been having problems with my EJ25 engine, got these codes

PO302 - Cylinder #2 Misfire Detected
PO100 - Mass Air Flow (MAF) Circuit Malfunction
PO301 - Cylinder #1 Misfire Detected
PO106 - Exhaust Gas Recirculation Flow Malfunction
PO400 - MAP/Barometric Pressure Circuit Range/Performance Problem


i cleared them an hour ago, drove for a few mins and parked

what do i do now?

[Huffer]

Well, P0400 is wrong, you don't have a MAP sensor.

My guess is that your MAF sensor is dead, which in turn throws everything else off.

What's the very first code that appears?

[chuckthefuk]

Umm you have some of your codes wrong...

--> viewtopic.php?f=11&t=13695 (https://sl-i.net/FORUM/viewtopic.php?f=11&t=13695)
--> http://www.troublecodes.net/Subaru/


P0100 *Mass Air Flow Sensor Circuit Malfunction
P0106 *Pressure Sensor Circuit Range Problem
P0400 *Exhaust Gas Recirculation Flow Malfunction
--Vacuum leak / lines disconnected-broken
--Failed MAF or EGR


PO302 - Cylinder #2 Misfire Detected
PO301 - Cylinder #1 Misfire Detected
--Have you checked your plugs & wires?
--There could be oil on your plugs or your wires could be bad.
--Your distributor could be bad. (where the wires plug into on top of the engine)

What have you done to your car? your username isn't helping the situation... have you installed intake/exhaust or some crazy ebay mod?

-Chuck

[chuckthefuk]

damn it Huff you beat me to it.. by a few minutes.
-Chuck

[Huffer]

Maybe, but your info is always way more detailed than mine. I'm more of the fuzzy explanation. :D

[ikeepblowingengines]

i ran without a filter for a few weeks, not driving often which caused my MAF to go bad i assume as the car wouldnt stay idleing and would backfire out of the intake hose,

today i replaced it with a used maf from a junkyard and so far its stayed running.. but i just read the codes after id replaced the maf, then cleared them and with the few minutes of driving afterwards, they've not come back on

i know for a fact though, that i didnt mess up writing down the codes... it was exactly what the o-reilly's auto obd reader said so im not sure what happened there

[ikeepblowingengines]

are the vaccuum lines the three connecting to the intake?

[chuckthefuk]

thats some of them.

heres your factory service manual

http://www.2shared.com/file/-msgxSGf/Su ... y1996.html (http://www.2shared.com/file/-msgxSGf/SubaruLegacy1996.html)

-Chuck