So this is my first post here and it's not a good one... My 2003 Matrix XR AWD started to misfire about a week ago. I noticed it more during hard acceleration or low rpm's. It has gotten a lot worse within the last couple of days. It misfires/hesitates a lot more now. It is still only doing it during acceleration or low rpm's, but it runs perfectly fine after about 20 minutes of driving. I wasn't getting a CEL this whole time. I just replaced the spark plugs and that was not the problem. Today I was driving home from class and it finally threw out a CEL. It came on then would blink intermittently and then it eventually remained lit. I rushed over to Advance and these are the codes that popped up; P0304(Cylinder #4 Misfire) and P0171(System too lean). My first guess is the injector on cylinder #4, but I would like some suggestions on where I should start so I don't end up spending all of my drug money on this. Thanks!
Reply 1 : P0304 and P0171 in '03 Matrix
Anyway, does your car fit theses symptoms and how cold is it where you live?: http://ww2.justanswer.com/uploads/sk...rolla_0171.pdf
How many miles and when was the last time you changed the plugs? You could rotate the plugs and see if it comes back. How does your engine behave on cold start ups? Tach bouncing or steady?
Reply 2 : P0304 and P0171 in '03 Matrix
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Originally Posted by mikered30 
Anyway, does your car fit theses symptoms and how cold is it where you live?: http://ww2.justanswer.com/uploads/sk...rolla_0171.pdf
How many miles and when was the last time you changed the plugs? You could rotate the plugs and see if it comes back. How does your engine behave on cold start ups? Tach bouncing or steady? |
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