Recent content by imjustdad

Gentlemen, my apologies for not posting back sooner. I'm ecstatic to report this has been solved. To be brief, it was the Cyl 4 injector that was bad. I swapped injectors around, and the misfire followed that injector. I replaced it, and it runs fine now. The tandem codes the system was...

NOT the igniter. The search continues.

Not yet, Bad Luck, but it's probably coming. At this point I'm still looking for a single point of failure whereas those cyl's are on separate banks. My plan at this point is to: 1. Change the igniter 2. Swap injectors around and see if miss follows 3. Then look at compression and ECU, wiring...

Update: Local shop had it for over a week. They're stumped and giving up, and I'm picking it back up today. I'm going to throw a used but known-working igniter at it and see what happens. If anyone has a flash of brilliance, I could use the illumination about now... Again, drives fine when...

Local shop had it for over a week. They're stumped and giving up, and I'm picking back up today. I'm going to throw a used but known-working igniter at it and see what happens. If anyone has a flash of brilliance, I could use the illumination about now... Thx!

No, no 0171. Just the 0301, 0304 [misfire Cyl's 1 & 4], and 0300 [multiple misfires detected]. I took it in to a local shop to put on their diagnostic machine. Hopefully they can point me in the right direction.

wallyk50, did you ever get that issue sorted? I have a '99 3.4 with 330k doing the same thing, just cyl's 1&4 instead of 3&6. I did the exact same thing you did -- replaced the shared coil, plugs and wires... SOS. I'm leaning ignitor, injectors, or ECM, in that order... Thanks!

Thanks for the input J. Hadn't considered the MAF. Was yours throwing misfire codes on specific cylinders consistently?

I'd say that's a good idea, thanks.

Hey man. Thanks for the input. Yes, I changed the plugs in the two missing cylinders when I changed the wires -- leave nothing to chance right? They looked fine, not fouled or discolored, electrodes good... The pigtail to the coil seems... fine. I didn't spend a lot of time with it, but wiring...

OK, checked Cyl1 injector cold/"running fine" state and it was 13.6 ohms. Checked it warm, after re-creating the misfire state, and it was 15 ohms -- close to Spartacus's values. No smoking gun there, unfortunately. Called a local "Japanese import specialist" and apparently his diagnostic...

Yes, very true Spartacus. It may be a pain to swap 'em around, but I CAN get to the leads for a that injector. I'll try that. I thought of head gasket, but since those two cyl's are on different sides of the motor I didn't think much more of it. At 330k, it's certainly possible though. Thanks man.

Hi 3bears, yes, it started all at once, in a single day. Hasn't gotten better, hasn't gotten worse. I seem to be able to recreate it at will, and whatever I do, the codes [301/304/300] continue to point at Cyl's 1 & 4. I'm a big fan of probabilities, and I'm with you, I just don't think it's...

Cylinders 1 & 4 - Misfire & Mystery 1999 4R Limited, 330k on the clock. Overall good shape. Short drive to store, enough to get it warm. Come back out, start it up, and it's missing. Limp it home and get flashing CEL. Pull codes and it's 0300, 0301, 0304. The latter 2 indicate cyl's 1 and 4...