z34Phoenix Posted October 6, 2013 Report Share Posted October 6, 2013 Ok after two days of installing my top swap i am left with a problem: Initial start up went fine it appeared. rand for about 1 min with no problems. I turned it off. Checked for leaks. All was good. Second start up went well and lasted about 2-3 min. Third start up I planned to take it around the block. I only made it about 500 feet and the idle started pulsing. Adding gas didn't help, it stalled out. I looked it all over and everything seemed fine. I figure vac leak. After letting it sit for 5 min I got it started and back to the house by keeping the rpm's up. I couldn't get it up the driveway as under load it stalled. I let it sit over night and next morning I got it up the driveway just as it stalled again. Today I have done the following: *Fuel Pressure Check. would shoot to 55-60 and then fall rapidly.--> bad FPR swapped with L36 as they are the same. *Compression Check: all read 180 psi. *Spark Plugs: All looked normal no oil or water. Checked coils and were good. *Check exhaust and tightened clamps on headers *RTV's SC gasket, zip-tied all the vac lines, swap PCV from the know good one that came off the L36. *Re-torqued SC. After rechecking everything I started it up and after only 45 seconds, same thing happened. Pulsing idle and then stall. ONLY this time I see coolant from the LIM on driver side rear. So my guess is LIM is leaking when it starts getting warm. When I installed the LIM gaskets, Al ones from ZZP, I used a dab of red RTV on the corners and red RTV on the bolts but not a bunch. Also, from the Data log the O2's are not moving. On start up they are in the 800-900 then fall to 50's and stay there. Is is it possible my O2 died? As it was working on before the topswap. I have video, pictures, and screen shot of data just as it dies. any help or suggestions would be appreciated. Quote Link to comment Share on other sites More sharing options...
redgrandprix Posted October 7, 2013 Report Share Posted October 7, 2013 is it possible some of the rtv got squished into a combustion chamber? if that stuff gets burned and into the exhaust it could kill an o2 sensor Quote Link to comment Share on other sites More sharing options...
z34Phoenix Posted October 7, 2013 Author Report Share Posted October 7, 2013 I used the copper rtv spray. I guess it could be possible that some got in. I guess I can pull the o2 and do a visual on it Quote Link to comment Share on other sites More sharing options...
z34Phoenix Posted October 7, 2013 Author Report Share Posted October 7, 2013 Got it running!!! My buddy Mike came over gave me a hand and helped bounce ideas around.I can't say for certine what the solution was. Here is everything I did: -Replaced SC gasket -tightened the TB more but was pretty tight -fixed coolant leak. The port on the LIM wasn't tight and was leaking. -I did not redo the LIM as I was pretty sure they sealed good and I did use rtv where the two gaskets met. -coolant psi check. Held 17psi for 45 min -swapped the mini harness for the icm and crank sensor to my old one. I had swapped these as I hd a spare that I wrapped an cleaned up. I decided to run as many known good parts from the L36 NA setup I could. bottom line... It fired up and stayed running. Took it for a spin around the block and checked for leaks. All is great! Now the fun begins... Tuning it. Quote Link to comment Share on other sites More sharing options...
redgrandprix Posted October 8, 2013 Report Share Posted October 8, 2013 Good to hear! Quote Link to comment Share on other sites More sharing options...
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