Tacomaboy-1 Posted January 13, 2012 Report Share Posted January 13, 2012 Hey guys,help shed some light pls. I've had my S-13 twin cam up and running for a month + but seem tobe fighting a rich condition. ie. fouling plugs,blue smoke at idle. Thru the on board ecu. I get solid,O2 signal,and code 55 meaning all clear on inputs. The eng,fires right up when cold,idles smooth,but when warms -up idle begins to surge betweena bit between 1200 and 875. All continuity and grounds gd. No bog what so ever of idle. The car is still currently up on dolly with no drive shaft in it so cant test under load. Very fresh rebuild. Thanks for any help. Quote Link to comment
Lee R Posted January 13, 2012 Report Share Posted January 13, 2012 Hey guys,help shed some light pls. I've had my S-13 twin cam up and running for a month + but seem tobe fighting a rich condition. ie. fouling plugs,blue smoke at idle. Thru the on board ecu. I get solid,O2 signal,and code 55 meaning all clear on inputs. The eng,fires right up when cold,idles smooth,but when warms -up idle begins to surge betweena bit between 1200 and 875. All continuity and grounds gd. No bog what so ever of idle. The car is still currently up on dolly with no drive shaft in it so cant test under load. Very fresh rebuild. Thanks for any help. How much oil is beeing burned up? I am in the process of rebuilding my VQ on my Z due to bad rings. Fouled plugs, oily smoke out the exhaust...1 qt every 500 miles! Do a leakdown to see how much is escaping past the rings. Quote Link to comment
datzenmike Posted January 13, 2012 Report Share Posted January 13, 2012 Take it out an pound it to seat those rings. Quote Link to comment
Tacomaboy-1 Posted January 13, 2012 Author Report Share Posted January 13, 2012 How much oil is beeing burned up? I am in the process of rebuilding my VQ on my Z due to bad rings. Fouled plugs, oily smoke out the exhaust...1 qt every 500 miles! Do a leakdown to see how much is escaping past the rings. 0 oil that I can tell. Fuel,yes. I changed the oil after about 3 hr. run time sence it started tohave lite smell of fuel.Lite bluish exhaust only at idle. Again, this eng is very fresh,anything and most everything internaly wae either resized or replaced. New Crower St. 1 cams,even went back from the 370 cc injector to the stock 250cc inj. I believe it is. I went out to double check timing and threw a #55 for un-plugging TPS while running. I feel real secure with wireing and ECU. I dont know but should know how many deg. to set the timming with the cam set I am using. None of the injector set-ups were new that I have tried. Thanks for help and sugestions. Quote Link to comment
Tacomaboy-1 Posted January 13, 2012 Author Report Share Posted January 13, 2012 Could very well be a ring seat issue,and I'm just overly cautious. Grow some nads Tacoma. I need to get the driveshaft shortned. Will measure for that tomorrow. Could be, Could be. Quote Link to comment
datzenmike Posted January 13, 2012 Report Share Posted January 13, 2012 Three hours of running without driving?? The first 1/2 hour is the best time to seat the rings. http://www.mototuneusa.com/break_in_secrets.htm Over rich would be black smoke. Oil is blue. Water/coolant is white steamy. Doesn't take much oil to make bluish smoke. Quote Link to comment
Tacomaboy-1 Posted January 13, 2012 Author Report Share Posted January 13, 2012 Right about the road test after start-up. Did'nt have driveline,still need throttle cable. Def. not oil.consumption. Probably need to take out and get some highway mi. on it. Exh,does go black when I spike throttle. Holding @ anything above 1K showes no trace or smell. Get the driveline in Quote Link to comment
ggzilla Posted January 13, 2012 Report Share Posted January 13, 2012 You can't get rid of blue smoke through tuning. It suggests the rings are worn or not seated. To confirm give it a wet & dry compression test. Quote Link to comment
KC Phirus Posted January 13, 2012 Report Share Posted January 13, 2012 I don't know anything about that engine, but every time I've had oil burning problems I changed the oil and added some valve guide seal conditioner and it fixed it. Quote Link to comment
ggzilla Posted January 13, 2012 Report Share Posted January 13, 2012 Yes, if the engine oil is overful, or sometimes if it is diluted, changing the oil will "fix" it. Or if it is not the rings then next most likely is the valve seals & guides. Changing the oil can temporarily help with that -- or at least make the smoke thinner and harder to see. Quote Link to comment
Tacomaboy-1 Posted January 14, 2012 Author Report Share Posted January 14, 2012 Yes, if the engine oil is overful, or sometimes if it is diluted, changing the oil will "fix" it. Or if it is not the rings then next most likely is the valve seals & guides. Changing the oil can temporarily help with that -- or at least make the smoke thinner and harder to see. Hey ,thanks for the helpful. Again ,this is a very fresh build,including head surfaces,deck,guides and seals.. I think I gotta act on Dat Mike's 1st. and for sure seat the rings to start with. Calling Buds machine tomorrow for cut and balance on the shaft. We'll go from there. Zilla ,pls. elaborate on the wet,dry comp. test. Would like to try. Thanks. Quote Link to comment
ggzilla Posted January 15, 2012 Report Share Posted January 15, 2012 See Engine compression test. It explains how to do a wet & dry test. Quote Link to comment
Tacomaboy-1 Posted January 16, 2012 Author Report Share Posted January 16, 2012 See Engine compression test. It explains how to do a wet & dry test. Tks. Zilla. Quote Link to comment
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