420A Check Engine Light blinking?

[twizdt]

My car started doing this today. I have a parts car i use so im going to try the old spark plug wires and change the coil pakc to see how it goes.

I have codes PO301 PO135 and PO140. I tried replacing the plug. wire, and the coil pack is tested and fine. Injector?

 

[VelocitàPaola]

I would replace your oxygen sensor first and foremost.

P0140 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)
P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0301 Cylinder 1 Misfire Detected

Thanks for posting your OBD codes by the way; it makes diagnosing what's going on with your car much easier.

 

[twizdt]

I dont have the wires for my o2 sensor connected. Its been like that for a while. Could it decide after about 6 months to make it seem like cylinder 1 is misfiring? i took yhe injectors out of my old eclipse to replace them. hoping that works. I reset the codes though so my dad said that it should trick it to think o2 sensor is working. Let me know tonight what i should do because Im going to replace the injectors tomorrow.

 

[VelocitàPaola]

You need a front O2 sensor... there's no way around it.

 

[twizdt]

if i change the front o2 sensor what will happen?

Also earlier today when i was trying to figure out what was causing cylinder 1 to misfire i took out the spark plug and started the car and it ran the same. all the others would not even let the car start so thats why im figuring its the injector. I need the car for work some im hoping after i change the injector it will run again.

 

[KazooGS-T]

Did you check to make sure you were getting fire off of that wire? I have a set of injectors here and will send you them if needed before you go spending a good bit of money for an injector.

 

[totaleclipse_05]

So.... is the o2 sensor hooked up yet?

 

[twizdt]

No the o2 sensor isnt hooked up yet. A mechanic also looked at it and said it is the injector. He said the others look like they are going to go soon also. Im going to hook up front o2 sensor today.

Okay here is what has been done so far. Changed spark plug, spark plug wire, injector. Waste of time so far because none of that worked. Any ideas of what it could be now? There was spark coming from the coil pack, does that mean it works or could the spark be the wrong Ohms? I have a coil pack from my 96' eclipse to use on my 97' if thats what it could be but it has a different plug in, if i cut and splice the wires, can i use the one from my 96' or is it a whole different coil pack? Also, where is the front o2 sensor located becuase the only one i have seen is by the cat.

Also, i took my ignition coil up to auto zone and the resistance is where it should be. I called Mitsubishi and they said it might be my valve. Is that true?

I need to get this fixed fast. I cant even drive my car right now.

Is it time to swap my motor?

 

[VelocitàPaola]

Don't bump your threads...

There are two oxygen sensors: one between the exhaust manifold and catalytic converter (the primary, or upstream); and another on the other side of the cat, on the side closest to the muffler (the secondary, or downstream). I can see you driving for a year without the downstream sensor, but the upstream sensor is absolutely essential. The car should barely run without a functioning upstream sensor.

 

[twizdt]

So it could have just gone bad and make my cylinder misfire?

My dad did reset the codes though. Wouldnt that fool it?

 

[Laysher91]

The only thing getting fooled is you. The ECU codes will reset but you will get the same error codes once it realizes the O2 sensor is still unhooked. Change your front O2 sensor (or hook it back up) like everyone is suggesting you do. What is the point of asking for advice if youre not going to take it? Your error codes are for an O2 and cylinder misfire error, FIX THE EASY ONE FIRST and then see how the car runs

 

[twizdt]

Okay I will get them off my old eclipse tomorrow and install.

Ok i ran into a problem. I got the o2 sensor off my old car to put in but the connectors are different and the sensor itself is a little different looking. Threads are the same though. Can i just cut off the adapter off both and splice in the wires and use my other. It is off a 96' and im using it on a 97'. Thanks.

Also, They both have white, white, gray, black wires on them. The gray and black are backwards when u put the connectors side by side. Do i just switch the 2 white wires on splicing them to make it the same?

 

[phill]

The same thing happened to mine when I first bought it. I took it to autozone and they said it was a misfire in cylinder 2. I bought new plugs and wires and haven't sen the problem since. You could try that route if you are running on older spark plugs.

 

[twizdt]

Phil here is what exactly happened. Ive been running without a rear o2 sensor for a while now. about a year so ive always had my CEL on. Well on my way home from work the other day, my car lost alot of power and started spuddering and stalled. I restarted it and it sounded like a crappy muscle car. Well, my CEL was blinking. I had a reader put on the ECU and i got codes PO301 PO135 PO140. I found out i had a misfire in cylinder 1. Ive changed the spark plug, spark plug wire, injector, had ignition coil tested for its resistance. Ive been told it could be that the front o2 sensor went bad. Im going to install that today and if that doesnt work then i dont know what could be wrong.

Okay well guys I put in the o2 sensor today. Didn't change a thing. What are my options now?

 

[VelocitàPaola]

Make sure you installed it correctly then check the stored OBDII codes again.

 

[twizdt]

Checked. PO301.

A few weeks ago i did manage to hook up jumper cables backwards. Had to replace all my fuses. Car ran fine after that but i did end up messing up the heater. 10 amp fuses kept blowing with replacement. Rained really bad one day and i was getting alot of fog on my windshield so i put in a 30 amp fuse to run the heater till i got home. Well on the way. my radar detector shut off along with my radio. didnt blow the fuse and my battery light came on. I took the 30 amp fuse out when i got home and the next day is when my cylinder started misfiring. Actually. the cylinder isnt firing at all. u can take off the spark plug wire off cylinder 1 and the car runs the same. i know im getting spark to the plug though. spark comes out of the wire end where it hits the plug.

Could my car have jumped timing? Could i have a clogged fuel filter? Fuel pump going bad? CAM Sensor?

I dont know if this will help diagnose. But when i rev it up to about 5-6 grand, blue or white smoke, not sure of the exact color, comes out of where the CAI connects to the valve cover. I have a little filter there instead of the hose.

 

[rstare]

Sounds like a piston ring is bad, thats what the blue/white smoke means, did you do a compression test? Sorry if you stated that earlier in the thread I didnt read the whole thing

 

[twizdt]

No I was hoping someone had this exact problem so i wouldnt have to do that. If i go get a compression test i will not have enough money to get my motor swapped.

Does my motor need taken out for a piston ring to be done?

 

[rstare]

You can do a compression test yourself, you just need a few tools that wont cost that much. Search and look on tech articles and itll be on there somewhere how to do a compression test. I would think the engine would have to come out to swap out piston rings, l have never done it personally but I wouldnt see how you could do it with the engine in.

 

[twizdt]

Okay ill just get my motor swapped then. So i know im not getting ripped off. About how much would a motor swap cost?

 

[rstare]

Dont just jump from one conclusion to the next. I would really recommend doing a compression test first, just to be sure that its a ring, theres no way it could hurt so you might as well do it.
When you say "motor swap" what do you mean exactly?
Are you going to swap your engine out and put in a stock 420a block? Or a stock 420a block and head? Or are you looking into performance? If your putting a new engine in and your looking for performance, you might as well do the internals now, whether you want to go turbo or stay n/a.
All of this effects the price so to tell you how much would be a very broad span.

 

[twizdt]

I have a 96' eclipse motor that i know is good. Im going to swap it as is. Im guessing just the block?

 

[rstare]

You didnt answer anything I asked you, it sounds like you need to do some more research and stop jumping to conclusions. Even if you have bad piston rings you dont need to change your whole engine out.
edit: You shouldnt be questioning yourself when it comes to putting a new engine in

 

[jemsoccer]

So let's get this straight so everyone can help you out. Answer these questions after testing...

1. This issue began right after you fried your electrical system by improperly jumping your car?
2. If you take your plugs out individually and set them on your motor (to ground them) and they are connected to the spark plug wires,
do they ALL spark? (Do this one at a time and check them all)
3. I would not do a compression check just yet as I think this is an electrical issue, but if you do, what are your readings you're getting?

 

[twizdt]

Well ill do a compression test tomorrow. Yes all my plugs are sparking. Maybe something is messed up electrical wise thats making my injector not give fuel? i dont know. But for my motor swap. Im just taking it off my 96 and putting it into my 97 nothing fancy. i jsut need to get back to work. I dont know how much more i can miss before im fired.

But i beast on it for being stock so i think maybe i did mess something up. I know its not normal with blue/white smoke coming out of my block.

I was going down rt 2 going like 110 for about 40 miles.

jem it wasnt right after. It was about 2 weeks after. I needed to use my heater about 2 weeks after that happened so i put the 30 amp fuse in. Im going to check compression tomorrow. and if its good ill know its an electrical issue.