2G Random misfire

[TSITurbo95]

Ok, so since the poly motor mount install with my clutch, my car will randomly misfire and throw a CEL "random misfire" code. When I cycle the key (turn off and back on) it fixes itself, but the CEL remains on. Then some more down the road, itll happen again, and ill cycle the key and fix itself, but still cel stays on with the code. Could that be a solinoid problem perhaps? Any suggestions?

 

[DeviantBoost]

I see you have DSMlink V3 in your profile just uncheck the cylinder misfire box in the DTC tab

 

[TSITurbo95]

How does that solve the issue? It just disables the CEL for that, but the issue still persists.

 

[DeviantBoost]

it keeps the ecu from "looking" for the random misfires. if there is a real issue then it will still be there. so spark plugs/ wires need to be checked after that

 

[TSITurbo95]

But the problem still persist with or without the cel, that is not my issue, my issue is that it still misfires randomly.

 

[TSITurbo95]

Any opinions? It just happens randomly. I shut off the car and restart and its fixed until the next time.

 

[dsmgsx98]

So when it says random misfire, does the car start running bad, or does the light just come on and that's it! Need more info to help you bro

 

[TSITurbo95]

Yes the car misfires and sounds like a suby. Also my wideband reads lean if that matters.

 

[kthackst]

An injector might be stuck closed. Try replacing the resistor pack. Or swapping back to the stock injectors.

 

[dsmgsx98]

Also I Wana know if its the same cyclinder every time, so next time it starts it pull over sand start pulling plug wires to see what cyclinder is doing it? BECAREFUL IT MIGHT SHOCK YOU! Just keep your fingers on the plug wire and nothing else!

 

[TSITurbo95]

I am going to replace the coil pack, plugs and wires to see if it so happens to solve it, but the only change I did that started causing it was I put in polyurethane motor mounts, and why is it intermittent like that though? Perhaps certain vibrations?

 

[dsmgsx98]

Could just be a loose conection!

 

[TSITurbo95]

Well the code is a p0300 Random Misfire. I am going to replace all the ignition components, then get back to you if its still happening.

 

[lAsErfWd]

I was recieving that code for random misfire in my Toyota Tacoma and it turned out the number 1 injector clip had come loose and the injector wouldn't always fire. Just another thing to check.

 

[TSITurbo95]

Checked, all clips there and connections tight. Thanks for the advice though.

 

[eclipsetuner_21]

What was the problem? I am having the same symptoms

 

[crazyboy81]

If it were a certain cylinder it would say which one it is. The simplest thing to do is check your plug gaps. My car can get a miss if they are gapped to big.

 

[TSITurbo95]

Yes, usually it will say which cylinder, but its the p0300 code which is all cylinders. I checked the gap, and they were good, .28 br7es plugs, and the problem is still happening, but its still so odd, as it goes away when I restart but happens again randomly. Anywho, I have new plugs and wires, along with a injector resister pack and coil pack in which I am going to replace tomorrow to hopefully solve the issue. I will post back if I found it. Thanks.

Ok so wires and plugs are replaced and still.happens. i tested the coil pack and it is good. Also i should add when it does it my wb reads reallean. Wouldent that be a fuel issue? What could be bad in the fuel issue? Relays? Also appears to only happen when im ttaveling above 65mph

 

[TSITurbo95]

Attached is a log, it happens towards the end of the log. Thanks.

Anything?

 

[TSITurbo95]

Ok so when I checked the log, I saw when it happened, my injector load was 0%. Possible relay?