Fixed my codes
Thread Starter
Evolving Member
iTrader: (10)
Joined: Jan 2007
Posts: 317
Likes: 1
From: Bel Air, Maryland
Fixed my codes
I recently threw a few codes
PO101 -MAS
PO300b -misfire
PO401 -EGR
The car was starting to run lik as$, had bad missfires at full throttle high rpm (above 5k)
Every once and a while it hit a brick wall (like a fuel cut) at about 3000-3200rpm
25% throttle cruising. I finally got some time to address all the codes, so....
The EGR was a easy fix. I reached around the manifold, under the throttle body found the EGR and felt around. It took me a few mins but i did find a stray vacuum line near EGR (normal small line) I felt the EGR again, and found a small nipple that i over felt before. It slid on a little too easy, so i zip tied it.
The MAS air was a easy fix too (takes 2 mins if you have a aftermarket cone filter.) Soon as i took it out, I couldnt believe it even worked. it was so gummed up and oily. Cleaning it was easy. Just bought some MAS cleaner from an auto shop.
pics here: https://www.evolutionm.net/forums/sh...d.php?t=253526
The mis fire was caused by one of the above (most likely the MAS) cause soon as i fixed those two. and reset my ecu. the codes never came back and never missed. The car was definitly down on some power.
The ECU was reset while i was working on the car. Before i started i unhooked the negative terminal of the battery and hooked it back up when i was done.
Hope this helps any future searchers for these codes.
PO101 -MAS
PO300b -misfire
PO401 -EGR
The car was starting to run lik as$, had bad missfires at full throttle high rpm (above 5k)
Every once and a while it hit a brick wall (like a fuel cut) at about 3000-3200rpm
25% throttle cruising. I finally got some time to address all the codes, so....
The EGR was a easy fix. I reached around the manifold, under the throttle body found the EGR and felt around. It took me a few mins but i did find a stray vacuum line near EGR (normal small line) I felt the EGR again, and found a small nipple that i over felt before. It slid on a little too easy, so i zip tied it.
The MAS air was a easy fix too (takes 2 mins if you have a aftermarket cone filter.) Soon as i took it out, I couldnt believe it even worked. it was so gummed up and oily. Cleaning it was easy. Just bought some MAS cleaner from an auto shop.
pics here: https://www.evolutionm.net/forums/sh...d.php?t=253526
The mis fire was caused by one of the above (most likely the MAS) cause soon as i fixed those two. and reset my ecu. the codes never came back and never missed. The car was definitly down on some power.
The ECU was reset while i was working on the car. Before i started i unhooked the negative terminal of the battery and hooked it back up when i was done.
Hope this helps any future searchers for these codes.
Thread Starter
Evolving Member
iTrader: (10)
Joined: Jan 2007
Posts: 317
Likes: 1
From: Bel Air, Maryland
Yea i did that already. test drove it, all that good stuff. Been a couple days. no problems yet. If the codes come back, then im on to a differant route. I'll let everyone know.
Im very **** about spark plugs, i change them all the time. If i ever get any lil problem i change them first.
Im very **** about spark plugs, i change them all the time. If i ever get any lil problem i change them first.
Thread Starter
Evolving Member
iTrader: (10)
Joined: Jan 2007
Posts: 317
Likes: 1
From: Bel Air, Maryland
Heres the update on this.
The mis-fire came back but not nearly as bad. Still have not thrown any codes. But a slight mis came back at full throttle.
Put 8.5 magnecor spark plug wires on it. Car runs great now. I think it was the wires the whole time....the other 2 problems just made it worse.
The car has 53k miles on it. Just wondering when the coils are going to go up? Did a search, didnt find anything. So maybe they'll last a lil while for me.
The mis-fire came back but not nearly as bad. Still have not thrown any codes. But a slight mis came back at full throttle.
Put 8.5 magnecor spark plug wires on it. Car runs great now. I think it was the wires the whole time....the other 2 problems just made it worse.
The car has 53k miles on it. Just wondering when the coils are going to go up? Did a search, didnt find anything. So maybe they'll last a lil while for me.
Last edited by EVOllie; Mar 4, 2007 at 05:37 PM.
