Stillrolla Posted November 28, 2019 Report Share Posted November 28, 2019 Im having a intermitted problem i've been trying to trace. Where the car leans out at cruising speed or stalls out on decel, also during regular driving acceleration i will have a loss of throttle response as if TPS failed but log's show voltage is fine. i see closed loop adding fuel but hits a max clamp, I've even set it to the limit of 40% and still wants to stall from going lean. but if i do a aggressive pull to WOT everything is fine. As of now the problem exist only on E85 i have yet to check 91 fuel. and recently just started, tune has been running for 3-4 months solid and 5-6 very hot track days So i have checked mechanically Map sensor, battery, alternator, main engine relay, TPS, Can Lambda (no errors on run times), lift pump surge tank pump socks/screen,Injectors(visually Clean but have not put them on cleaner), supercharger bypass. all vacuum lines Fuel pressure checks out . fine as well In the log if you map engine speed with TPS you can see a input of 76% but nothing moves (Logs and Cal file attached) [email protected] LEAN CRUISE_DIES.llg Quote Link to comment Share on other sites More sharing options...
Adamw Posted November 28, 2019 Report Share Posted November 28, 2019 I would say your MAP sensor is dying. When it starts to go lean the MAP is only reading 6KPa which is near impossible (it shows 0 in some areas) and at the end after it stalls the MAP is 74 when the BAP is 92. MAP and BAP should read the same when engine is off. Stillrolla 1 Quote Link to comment Share on other sites More sharing options...
Stillrolla Posted November 28, 2019 Author Report Share Posted November 28, 2019 That was one of my concerns. in the past on a log it showed a 30PSI MGP on a track session but the charger cant go past 10psi. Thanks Adam ! Quote Link to comment Share on other sites More sharing options...
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