kklepack Posted January 24, 2020 Report Share Posted January 24, 2020 Just got 1999 V70R with 212k and car starts/idles fine for the first 10-15 min. and then begins to stumble/idle rough. Runs fine above 2000 rpms. No codes in on VIDA scan, also It has new XeMODeX ETM installed by previous owner and it was programmed by the dealer. Looking for help and suggestions and idea how to tackle this problem. Link to comment Share on other sites More sharing options...
Ihatespeedbumps Posted January 24, 2020 Report Share Posted January 24, 2020 We probably need to start with the basics here. Do we have any air leaks? How is our fuel pressure? Any history on the fuel pump relay? Link to comment Share on other sites More sharing options...
kklepack Posted January 25, 2020 Author Report Share Posted January 25, 2020 Sorry, I've should add I will be working on replacing vacuum lines next week since it is 20yrs old car, fuel pressure seems ok after pressing little nipple on fuel rail, Fuel pump relay has been replaced with one from the junkyard and same symptoms.more update to come. Link to comment Share on other sites More sharing options...
kklepack Posted February 3, 2020 Author Report Share Posted February 3, 2020 Someone suggested to replace ECT. ECT and thermostat has been replaced and no luck same symptoms. Re-scanned for codes and again no codes. Did XeMODeX ETM test by their flow chart troubleshooting and all passed. Perhaps MAF could be the issue? Link to comment Share on other sites More sharing options...
bmdubya1198 Posted February 3, 2020 Report Share Posted February 3, 2020 Definitely make sure there are no vacuum leaks, that's going to be the best place to start. Try unplugging the MAF, then starting it back up when it's warm. My top 2 guesses after vacuum leaks are MAF or ECT, but if you already replaced the ECT sensor that's probably not the problem. Link to comment Share on other sites More sharing options...
kklepack Posted February 4, 2020 Author Report Share Posted February 4, 2020 11 hours ago, bmdubya1198 said: Definitely make sure there are no vacuum leaks, that's going to be the best place to start. Try unplugging the MAF, then starting it back up when it's warm. My top 2 guesses after vacuum leaks are MAF or ECT, but if you already replaced the ECT sensor that's probably not the problem. No love, same symptoms. when MAF is disconnected. I will try to swap vacuum lines this weekend and go from there. Thanks for advise. Link to comment Share on other sites More sharing options...
Zappo Posted February 4, 2020 Report Share Posted February 4, 2020 I doubt it is vacuum, or you would have issues at all temp ranges. You could just spray some brake cleaner around the lines to see if the RPM changes. I am thinking you may have a bad coil. I had a similar issue that it wouldn't idle very well, but above 2000 RPM it seemed to run fine. Once warm, try disconnecting a coil and starting the engine. If that coil is good, it should run even worse. If it runs the same, you found the bad coil. Link to comment Share on other sites More sharing options...
bmdubya1198 Posted February 4, 2020 Report Share Posted February 4, 2020 My cousin's car had an issue with that a while back, usually it felt fine above 2000 RPM with a dead coil. Swapped it out, ran perfectly. Link to comment Share on other sites More sharing options...
kklepack Posted February 4, 2020 Author Report Share Posted February 4, 2020 15 hours ago, Zappo said: I doubt it is vacuum, or you would have issues at all temp ranges. You could just spray some brake cleaner around the lines to see if the RPM changes. I am thinking you may have a bad coil. I had a similar issue that it wouldn't idle very well, but above 2000 RPM it seemed to run fine. Once warm, try disconnecting a coil and starting the engine. If that coil is good, it should run even worse. If it runs the same, you found the bad coil. Off the topic. Is the Techno Viking??? Link to comment Share on other sites More sharing options...
Zappo Posted February 5, 2020 Report Share Posted February 5, 2020 6 hours ago, kklepack said: Off the topic. Is the Techno Viking??? Yes it is. Link to comment Share on other sites More sharing options...
kklepack Posted February 5, 2020 Author Report Share Posted February 5, 2020 @Zappo and @bmdubya1190 I did coil test per your recommendation and car ran worst after unplugging one coil at the time. I was told that PO replaced the spark plugs and coils 10k miles ago. One observation. after car wormed the temp gauge arrow stayed in the middle on the dashboard and the coolant almost reached to the top of the coolant tank . Is it normal ? Before replacing thermostat I drained 2 qts of coolant and when I re added the level stays above the MAX all the time Also when car was choking/puffing after worm up is saw smoke coming out of dipstick, but glove test passed. PCV? https://photos.app.goo.gl/XgrP7TsZghdPDh5b7 Link to comment Share on other sites More sharing options...
bmdubya1198 Posted February 5, 2020 Report Share Posted February 5, 2020 Where does it sit when the engine is cool? I noticed yesterday that our XC90 V8 does that too, the level rises maybe an inch when hot. My V70R does not, though. The smoke is likely from the PCV. I've had cars pass the glove test that still have a clogged up PCV. Link to comment Share on other sites More sharing options...
kklepack Posted February 10, 2020 Author Report Share Posted February 10, 2020 On 2/5/2020 at 12:43 PM, bmdubya1198 said: Where does it sit when the engine is cool? I noticed yesterday that our XC90 V8 does that too, the level rises maybe an inch when hot. My V70R does not, though. The smoke is likely from the PCV. I've had cars pass the glove test that still have a clogged up PCV. Coolant level sits at MAX level. Here is a short video how it runs. https://photos.google.com/share/AF1QipMM4QCjXzqPzEFCgHHY1IWy6VD-oFlN-LAGEnSHK5bW1H0ubJNOKeeOnCTRuBD4FQ?key=eGFyZS1oZmZfdG5qZlEtbW0zcWh4eUxmRllrOW9B Link to comment Share on other sites More sharing options...
bmdubya1198 Posted February 11, 2020 Report Share Posted February 11, 2020 I wouldn't worry too much about the coolant level at this point. It definitely sounds like it's down a cylinder though, but if unplugging each coil made it worse, then it's not the problem. Link to comment Share on other sites More sharing options...
kklepack Posted February 11, 2020 Author Report Share Posted February 11, 2020 1 hour ago, bmdubya1198 said: I wouldn't worry too much about the coolant level at this point. It definitely sounds like it's down a cylinder though, but if unplugging each coil made it worse, then it's not the problem. Thanks, I'm going to work on PCV and replace vacuum lines with silicon and see if it helps. Link to comment Share on other sites More sharing options...
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