P0304 Cylinder 4 misfire.

[alkemyst]

I am getting the right ohms at the injector per the FSM, the right volts at the power connector to the injector...but the injector isn't 'ticking' as far as I can tell.

Is there something else to check? I went through the FSM and it gets into CONSULT stuff....

I pulled the plug and it looks fine, my plug wire gave 350 ohms resistance (accel's)....I checked for spark and it was.

I don't mind ordering a set of injectors from Deatschwerks, but if that is not the right solution I'd like to spend the money on the right one.

plugging the injector power back in doesn't fix the bad idle hardly at all. Oddly this morning it ran fine on the way to work, but about 2 mins into my commute home it was back to limping.

Thanks

Å

[Rucca]

Switch injectors around. i.e. put 1 on 4 and vice versa and see if the misfire moves to cylinder 1.

[UNVMY240]

are you checking resistance on the harness side or the actual injector? 350 is high for an injector if my memory serves me right.

[alkemyst]

are you checking resistance on the harness side or the actual injector? 350 is high for an injector if my memory serves me right.

Those are the spark plug wires

The injector itself is around 12, 10-14 is normal.

[alkemyst]

Switch injectors around. i.e. put 1 on 4 and vice versa and see if the misfire moves to cylinder 1.

I had thought about that, but at the same time if it fixes it I'd need the injectors anyway and if I crack one taking it out...then I'd be really screwed

I ordered up some wires and plugs just to cover most of the easy stuff. I plan to do a compression test too however; I doubt it's bad valves.

[Rucca]

Well when you disconnect the problem injector - does the idle speed drop?

[alkemyst]

Well when you disconnect the problem injector - does the idle speed drop?

I posted in the original post...it doesn't change it by much at all. It's a tad different but still sputtering. Disconnecting another injector and reconnecting it is majorly different.

Hopefully the parts arrive quick ordered from detschwerks.

[Cone Junky]

The switching injectors make the most sense. But your logic is that they might get damaged while swapping. So order up a complete set of injectors and see what happens. Of course, since you never verified it as a problem, it could be a complete waste of time and money.

[alkemyst]

at 100k miles I doubt they'd be a total waste. For $150 once i send the cores in, it's not that much more than an injector service and I know they are right.

Even autozone is about $125 per injector...detschwerks is a great deal.

If I could have afforded more downtime it'd have been cheaper to send in my injectors for service.

[alkemyst]

just an update...unfortunately UPS decided to take their time so the injectors won't be here till next week.

Did a compression test and got 175psi across all four cylinders so I am happy about that (about 100k on the engine). Still could be a rounded cam lobe not opening the valves...but I doubt it.

Have a set of wires and new NGK's coming as well....don't know how old the wires were on the car since the previous owner did them. I got good ohm readings across them all though.

Hopefully I get the car back to running right this next week.