MadeInJapan Posted September 8, 2012 Report Share Posted September 8, 2012 '99 V70 (non-turbo) of my friend's...fairly well maintained w/ 147K miles on it. A month or so ago, he got misfire codes and a constant 02 sensor code (SENSOR 1, BANK1). Replaced the 02 Sensor w/ the correct one. Now, cylinder 1 and cylinder 2 don't fire at all...changed the coil packs around and it makes no difference. We can unplug both of the coil packs at cylinder 1 and cylinder 2 while the car is running and it makes no difference on how bad the car is idling...no change in sound. Did a scan and all we now get is error code for Sensor 1, Bank 2 and occasional "random" misfire codes. Gonna try and go help him with his car again this morning. I read in VADIS where the IDM (Ignition Discharge Module) supplies voltage to these coil packs. Since the two sets of wires that go to coil pack 1 and coil pack 2 are linked together, I'm wondering if the IDM is separate for 1&2 and 3,4&5? If so, where is the IDM?? Or, is there a separate Relay for these coil pack sets? Certainly that would be a simpler solution than trying to fault trace this issue. Any ideas?? Link to comment Share on other sites More sharing options...
MadeInJapan Posted September 8, 2012 Author Report Share Posted September 8, 2012 Okay guys- I need some help on this...leaving for my friend's house soon w/ tools in hand (and volt meter), but I really don't know where to start. Link to comment Share on other sites More sharing options...
MadeInJapan Posted September 8, 2012 Author Report Share Posted September 8, 2012 At friend's house....pulled 1 and 2 plug, grounding it and they both spark, so different issue than what we thought. Trying to figure out if it's fuel related, but other 3 cylinders are getting good spark and fuel. Raining now, so taking a short break, hoping someone will respond. Next step, measuring ohms at fuel injectors and going from there- possibly swapping them around.... BUT....could it be the ETM?? Would it cause this craziness?? It has never been replaced- maybe never been cleaned either. There isn't an IAC on this car is there? I do not see it, if it's present. I'm thinking it's part of the ETM....certainly idle is very low- 600rpm's and below and if you put it in gear, it stalls unless you floor it and top speed about 30-40mph if lucky. Spark pugs are all new and gapped properly. Other thoughts- Relay?? Eagerly awaiting any reply. We are stuck!! Link to comment Share on other sites More sharing options...
jschaefer7406 Posted September 8, 2012 Report Share Posted September 8, 2012 Hello, Are you 100% sure its cylinders 1 and 2 continuously missing, or is it just a random miss? ETM won't cause a misfire, but it will cause a limp home condition (30-40mph top speed). No ETM codes set? Have you checked the compression of the missing cylinders? Could be fuel, but its pretty unlikely that two injectors are bad together... Wish I had more ideas for you Joe Link to comment Share on other sites More sharing options...
MadeInJapan Posted September 8, 2012 Author Report Share Posted September 8, 2012 Thanks Joe- at this point, we are not sure...we were also getting a random misfire code two days ago, but seems to be stablized misfire on cylinder 1 right now....very strange, but what has stumped us is the most is that it didn't matter if we pulled the coil connector off of 1 or 2 or both while the car was running- there was absolutely no difference in how the car was running- no ETM code has been set. My friend did have a steady Bank1/Sensor1 code before and put a new front 02 sensor in- then he started getting a Sensor 1, Bank 2 code...checked resistance on the bad 02 sensor and nothing there whereas there is resistance on the new one. The rear 02 sensor has resistance too so I don't think it is bad. A lot could be wrong or it could be something simple. We would have to go get a compression tester from the auto parts store to check compression- something we haven't done yet, but with plug out (when we checked them), there seemed to be a lot of air forced up through the plug hole when we cranked the engine.Could ECT sensor cause crazy things like this? Would it give us a code? Link to comment Share on other sites More sharing options...
jschaefer7406 Posted September 8, 2012 Report Share Posted September 8, 2012 I assume the plugs are in good condition? You said you tried switching the coils already. Only things left are compression and fuel. Could try switching the injectors I suppose, as long as the o-rings aren't damaged. ECT failing will usually cause a fault, as well as an erratic gauge reading when warm. Can cause it to run rich when warm, as it usually will fail safe to a cold (enriched) condition. Very unlikely its enough to cause a miss though. Sensor 1, bank 2 makes no sense, as only the 6 cylinder engines have 2 banks. Maybe a generic definition for another fault? Sometimes a vacuum leak will cause 02 faults, something to consider as well. Hope this helps, Joe Link to comment Share on other sites More sharing options...
MadeInJapan Posted September 8, 2012 Author Report Share Posted September 8, 2012 Went and bought a compression tester- cylinder 1: 60 psi cylinder 2: 0 (zero) cylinder 3: 180 cylinder 4: 180 cylinder 5: 180+ Now I know what the problem is and why switching coils between 1&2 made no difference. Probably burnt between 1 and 2...so the head will have to come off to figure out what all needs to be done if my friend wants to save this car Link to comment Share on other sites More sharing options...
Ghettobird Posted October 8, 2012 Report Share Posted October 8, 2012 How did it all turn out in the end? Link to comment Share on other sites More sharing options...
Dan A Posted October 8, 2012 Report Share Posted October 8, 2012 Head gasket? Link to comment Share on other sites More sharing options...
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