flippu10 Posted June 5, 2008 Report Share Posted June 5, 2008 Hello all,As I was driving home today, the car all of a sudden started to surge and then stumbled followed by heavy shaking. All the while, the CEL kept flashing. I continued to drive it home since I was only a few miles away. It continued to shake during acceleration and not a lot of power. When I got home and got out of the car, I noticed a foul smell like the smoke from fireworks. I checked the OBD and pulled 2 codes, p0304 and P0234. I'm not sure if they are related but one is a misfire in cyl #4 while the other is a max turbo boost. After reading a number of posts, it looks like I'll have to replace the TCV and ignition coil.Does anybody know where I can get the TCV? Are there any aftermarket ones that may be better? As for the ignition coil,can someone tell me which one is cyl#4.I appreciate any help you can give me. The car is dead until I replace these parts. TIA. Link to comment Share on other sites More sharing options...
drjonez Posted June 5, 2008 Report Share Posted June 5, 2008 The TCV is all of $40 from Volvo IIRC. IPD does have an upgraded one coming out for $80ish, I built my own for less. You can simply bypass it and wait until you have the new one. The ignition coil code is causing most of your problem. Link to comment Share on other sites More sharing options...
flyfishing3 Posted June 5, 2008 Report Share Posted June 5, 2008 i'm waiting for the IPD one. i hope its worth the extra. Link to comment Share on other sites More sharing options...
UnknownSoldier Posted June 5, 2008 Report Share Posted June 5, 2008 i'm waiting for the IPD one. i hope its worth the extra.I sent lucky a pm 2day,lol,cos he has em without the brackets for less i think. like 70$ Link to comment Share on other sites More sharing options...
flippu10 Posted June 5, 2008 Author Report Share Posted June 5, 2008 The TCV is all of $40 from Volvo IIRC. IPD does have an upgraded one coming out for $80ish, I built my own for less. You can simply bypass it and wait until you have the new one. The ignition coil code is causing most of your problem.Thanks. I will address the misfire problem so I can at least drive the car while waiting for the TCV like you suggested. By the way, do you know where cyl #4 is? Is it 2nd from right or left as your facing the car? I'm going to have to check and see if it is the plug or the coil. I have Denso Iridium plugs that has about 30K on it. Thanks again. Link to comment Share on other sites More sharing options...
drjonez Posted June 5, 2008 Report Share Posted June 5, 2008 I sent lucky a pm 2day,lol,cos he has em without the brackets for less i think. like 70$That's actually a reasonble price, it's a standard industrial solenoid. The trouble is the bracket + the connector (I simply hacked the connector off my old TCV). ...I'm going to have to check and see if it is the plug or the coil. I have Denso Iridium plugs that has about 30K on it. Thanks again.The Iridium plugs may very well be your problem- they don't work real well in forced-induction engines. A copper plug is the best route (if you can deal with the replacement interval). Link to comment Share on other sites More sharing options...
flippu10 Posted June 6, 2008 Author Report Share Posted June 6, 2008 I just want to report back. I replaced the spark plugs with regular copper plugs. That did not fix the problem. I did not think that would fix the misfire, but I wanted to try out the copper plugs. I replaced the ignition coil, cyl #4. That fixed the problem. It was indeed a bad coil. By the way, cyl #4 is the 2nd cylinder from the driver's side end. I was going to do a trial and error in figuring which one it is. First try and it worked. I will pick up the TCV from the dealer tomorrow. Thanks all. Link to comment Share on other sites More sharing options...
drjonez Posted June 6, 2008 Report Share Posted June 6, 2008 Good to hear that you've got it working! The coils seem to be a common problem... Link to comment Share on other sites More sharing options...
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