Jaysdogjazz
Member
- :
- 2003 Mazda Protege5
I need some help I am loosing my mind trying to figure this out. I have an Intermittent rough idle, While in gear like at a stop light it will act like a misfire and the RPMS will drop a couple hundred and then back to normal... sometimes at the stop light it might do it a couple of times and then back to running like normal. When the motor is cold it seems to be fine.
Here is how it all started. I went to sears to get the oil changed. When I pulled out of the lot it was misfiring and throwing a P0300. So I went back in and found they cracked my air intake tube while checking to see if my air filter was clean. So I put vulcanizing tape to seal it and I thought it was working fine but it was still misfiring. So I was thinking they must have also messed up my Coil packs by maybe leaning or touching them. Being I have Autozone Coils I went down to store to use the lifetime warranty on them and get a new pair. Still got a P0300 and P0301 and it was running rough still.
So in my infamous wisdom and it being Sunday evening and I need to get to work I ran down to Walmart and grabbed the expensive Bosch platinum 4's. Ran fine for a couple of days but still had the intermittent lag / misfire. Then at about the end of the week P0300 and P0301 all the time.
So I went back to Autozone got another pair of Coils they tested bad. They guy at Autozone thought he knew everything... Funny the computer he had said to test the Resistance on 3 or 4 points its suppose to read like 3 - 4k resistance on the coil packs It was all within specs. So he grabs a new pair anyways those those were reading infinite. So then he was like I must be doing something wrong...
I went ahead got the 2 new coil packs 4 new spark plugs went ahead and got the NGK's like I am suppose to have and got a new PCV Valve.
Runs Great for 2 weeks
Now its slowly coming back again the misfire is getting worse and more often but I also getting a new Fault P0171.
I found that the Intake tube has another small crack and I picked up a new tube from O'Reilly's they have the Dorman one for $ 36.00 I plan to install this later today...
My concern is prior to this all starting back when it was like a California cold in the 50's I would occasionally get a fault saying that my Catalytic Converter was under temp. but once it warmed up the fault would go away. Could purchasing a new Upper O2 sensor be a part I need to replace next if this air intake tube does not resolve my rough idle problem.
I have also seen others post about P0171's being repaired by replacing the fuel pump and fuel filter "Fuel Sock". Should this be my next part purchase.
Any input on what to do next would be greatly appreciated and Thank you in advance for taking the time to see if you have some info that might help.
Here is how it all started. I went to sears to get the oil changed. When I pulled out of the lot it was misfiring and throwing a P0300. So I went back in and found they cracked my air intake tube while checking to see if my air filter was clean. So I put vulcanizing tape to seal it and I thought it was working fine but it was still misfiring. So I was thinking they must have also messed up my Coil packs by maybe leaning or touching them. Being I have Autozone Coils I went down to store to use the lifetime warranty on them and get a new pair. Still got a P0300 and P0301 and it was running rough still.
So in my infamous wisdom and it being Sunday evening and I need to get to work I ran down to Walmart and grabbed the expensive Bosch platinum 4's. Ran fine for a couple of days but still had the intermittent lag / misfire. Then at about the end of the week P0300 and P0301 all the time.
So I went back to Autozone got another pair of Coils they tested bad. They guy at Autozone thought he knew everything... Funny the computer he had said to test the Resistance on 3 or 4 points its suppose to read like 3 - 4k resistance on the coil packs It was all within specs. So he grabs a new pair anyways those those were reading infinite. So then he was like I must be doing something wrong...
I went ahead got the 2 new coil packs 4 new spark plugs went ahead and got the NGK's like I am suppose to have and got a new PCV Valve.
Runs Great for 2 weeks
Now its slowly coming back again the misfire is getting worse and more often but I also getting a new Fault P0171.
I found that the Intake tube has another small crack and I picked up a new tube from O'Reilly's they have the Dorman one for $ 36.00 I plan to install this later today...
My concern is prior to this all starting back when it was like a California cold in the 50's I would occasionally get a fault saying that my Catalytic Converter was under temp. but once it warmed up the fault would go away. Could purchasing a new Upper O2 sensor be a part I need to replace next if this air intake tube does not resolve my rough idle problem.
I have also seen others post about P0171's being repaired by replacing the fuel pump and fuel filter "Fuel Sock". Should this be my next part purchase.
Any input on what to do next would be greatly appreciated and Thank you in advance for taking the time to see if you have some info that might help.