malibud Posted May 19, 2014 Share Posted May 19, 2014 Problem engine runs at 12 degrees of timing at idle . It dies after running hard (idle drops to below 500 and can't recover ) As far as I have read the base timing should be around 20-24 at idle . Back ground... 1972 240 with a turbo swap it is new to me so I don't know everything. it is kinda of a hodge podge bored out f54 block, n42 head, Jim Wolf ECU (modified stock) 420 injectors, garrett turbo, water/oil cooled external waste gate about 1 bar of boost. I think the wastegate is a TIal knock off I have read it is best to spend the money here and get a new WG. I have advance the timing as far as it will let me (12 degrees) by moving the distributor. I tested the TPS circuit at the ECU box.All is good there connection with no throttle, infinity ohms at throttle(no connectivity). There is only a limited amount of adjustment by moving the TPS. I did move it up as far as it could go. (the throttle body is not original TPS is horizontal not vertical) so my RPM increased but still did not help problem: Coming off high rev Rpms drop then car dies. Maybe I should open the TPS and clean contacts? don't want to fix if not broke . I did test the FI temp sensor it checked out OK 2.6 ohms (it is mounted on the fuel pump delete plate) This should advanced the timing at idle but it is not. I will try to figure out where it plugs into the ECU this week and check connectivity there to rule it out but perhaps this is where the problem is. Any suggestions? car runs ok no real boost until 3500 rpm then it will throw you back at about 4500Thanks Quote Link to comment Share on other sites More sharing options...
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