SOHC Posted November 16, 2013 Share Posted November 16, 2013 I have a 1981 Volvo 245 GLE with Kjet fuel injection witch has developed a intermittent misfire at idle and seems to do it a bit when you pull away from the lights, it seems to run very well otherwise, has good power. and is good on gasI have replaced plugs, HT leads, dizzy cap, injector O rings, tried a different IGN coil,Plugs look like it has been running lean, I don't have any way to check the fuel pressure, but I have enough spare parts to replace most of the K jet system. the air control valve seemed to have a hole in the top by that small nut is that ok? I smoked some tea leaves and blew the smoke in the vacume advance tube and it was comming out that hole witch looks like it shouldn't be there.What elce should I check? any good DIY tips? Here is how it works http://www.k-jet.org/articles/information/k-jet-in-detail/ Quote Link to comment Share on other sites More sharing options...
SOHC Posted November 17, 2013 Author Share Posted November 17, 2013 found that the intake manafold gasket was leeking a bit, I hope this will be the cause of all my trobbles Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted November 18, 2013 Share Posted November 18, 2013 sounds like a similar problem that i had when my inlet had a vac leak, hopefully youre sorted 1 Quote Link to comment Share on other sites More sharing options...
madmitsi Posted November 18, 2013 Share Posted November 18, 2013 My Gemini done that and the timing was out set it again runs mint now, you could check.that out aswell 1 Quote Link to comment Share on other sites More sharing options...
SOHC Posted November 19, 2013 Author Share Posted November 19, 2013 I replaced the gasket, it runns better but misfire is still there, plugs look like it was / is running lean, will check timing like madmitsy says, I have allways just twisted the dizzy round till I find the spot it runns the best 1 Quote Link to comment Share on other sites More sharing options...
Steelies Posted November 19, 2013 Share Posted November 19, 2013 burnt valve? Quote Link to comment Share on other sites More sharing options...
SOHC Posted November 19, 2013 Author Share Posted November 19, 2013 burnt valve? I hope not, I must check the tappits, might have a tight one? they are bucket and shims, yay. Quote Link to comment Share on other sites More sharing options...
AllTorque Posted November 19, 2013 Share Posted November 19, 2013 Might be worth doing a compression test first. Quote Link to comment Share on other sites More sharing options...
SOHC Posted November 19, 2013 Author Share Posted November 19, 2013 Might be worth doing a compression test first. I should do that next but I don't have a tester, I wiped the cam cover off and a quick check with the engine warm they all have clearnce. feel like paying someone elce to sort it out, I have wasted about 4 days on this allready. Quote Link to comment Share on other sites More sharing options...
SOHC Posted November 20, 2013 Author Share Posted November 20, 2013 Dizzy rotor has a resistor in the top, I think that was bad, replaced the rotor and now its running sweet, missfire seems to have gone. 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.