Need Need Help With A Few Codes
Check Engine Codes : P0300, P0420, P0171
The P0300 is there sometimes, not there other times, I have all new plugs and wires on this car. My ignition module went out on the car a couple months ago and I had that replaced, the people that replaced it said I might have a bad coil pack but its hard to know until the ingintion module was fixed. So I had them fix it incase I had other problems with the car. I would have done it my self if I didnt have to get to work the same day. Sometimes I notice a misfire other times I dont, sometimes if I clear the code it takes awhile before it will come back. I took the sparkplug wires off each coil back and measured at 200 Ohms and got a reading of 6.1, 6.1, and 5.8 the 5.8 worries me just a bit because its different then the other 2 but I am not sure if thats enough to make problems or not
The P0171 has been there since I replaced the head gasket, which took awhile because I could not fit the car in the garage and it was raining a lot. And once back together it was misfiring on 2 and 3 after some injector cleaner, cylender 3 stopped misfiring (at least not enough to throw a check engine light over) cylender 2 didnt come back after 4 tanks of injector cleaner so I replaced it. I think I still need to replace injector 3
As far as the P0171 I sprayed everything with carb cleaner, spark plugs, all the new gaskets, the throtle body and there was no change at all to the idle. Anyone else have any ideas?
As for the P0420 I think I want to solve the other 2 first since the P0420 was the last code that I had come up. And from what I have been told and what I have read is some of these codes could be causing the others.
The car does run fine other then a hicup every now and then. And if I start the car and run to the store, when I come out it dont like to immediately turn over like it does when its cold.
Anyone with any ideas?