lmason2554

OK, I fixed it. Here's the follow up: After checking timing, compression and spark I finally determined cylinder #1 never changed the engine miss. With the engine running I pulled the plug wire - no change. Next I disconnected the plug to the fuel injector (with the engine running) - no change. I pulled out the specs. on the ohm readings for the fuel injectors. Tested all four. Cylinder number one had a bad reading. Replaced the injector and the car runs like nothing was ever wrong. The moral to the story - If there is no error code check the ohm reading on the injectors. At least that's what I learned from this story. Thank you for all of the ideas and support.

I did check compression, looking for a burned valve. Compression is good. The plugs I replaced all looked good, even burn in all cylinders. I'm confident spark and compression is good. I'm going to check cylinder 1 at TDC against timing marks to see if the timing is off. Your point about the coolant temp is a good one too. I'm also going to check the coolant temp sensor. The thing that confuses me about that is I replaced that sensor less than 10K miles ago, but maybe its gone bad.

Definately an interesting point. Is this something that happens with a Subaru timing belt? I've had timing chains on other vehicle do that, but I thought a timing belt would just break.

Thanks for the feedback. It's running bad all the time, of course, we haven't had any really cold weather for a while so I don't know how it acts cold (below +10 F). I did replace the o2 sensor less than 20,000. I did get error codes when that happened.

Hi, I'm new to USMB. I have a 91 Legacy - non turbo - that has a steady miss, poor performance and the cat. converter gets too hot. The car acts like the ECU has gone to baseline as if a pimary sensor has failed, but there have been no error codes recorded. I have tried to perform the D-check but all I get is a steady flash of the CEL. I have replaced the plugs and wires, checked for good fuel pressure, checked connections and wires at all sensors, checked vacuum lines ... This is a good running Soob that is well maintained with 230,000 miles. Any suggestions or ideas?