coupe Posted September 23, 2017 Share Posted September 23, 2017 Hi Gang. My liberty 2002 B4 twin turbo 2.0. died driving the other night. All sensors are correct ,no codes, cam sensor good cam position sensor good ,Map sensor good ..got spark got fuel, fuel controller working ,pump working. starter turning car over, motor tries to fire then gives up. car showed loss of boost 3 pounds that morning but was driving fine, small miss in the running of the car occasionally. the immobilizer isnt a issue and the brant system was removed awhile ago. no smoke no oil in water or water in oil. traced the wiring back to the ECU no issues. cat converter ok . Im stumped .........anyone had this happen or has any ideas... Quote Link to comment Share on other sites More sharing options...
Fairtax4me Posted September 23, 2017 Share Posted September 23, 2017 Can you smell fuel at the tail pipe after cranking? Pump might be running but if injectors aren't pulsing you get no fuel. Can check injector pulse with an LED test light. Pull timing covers and check timing marks. You can have signals from the cam/crank sensors but if they're not in time you'll have incorrect spark and fuel timing. 1 Quote Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted September 23, 2017 Share Posted September 23, 2017 our NA models have a fuel pump that can lose pressure due to a broken metal cap and/or ruptured o-ring. Quote Link to comment Share on other sites More sharing options...
coupe Posted September 24, 2017 Author Share Posted September 24, 2017 Thsnks guys. The pump and controler are new . I have fuel and pressure to injectors and they working. Im thinking the compression rings have died in one of the cylinders as i had the boost loss (18 psi down to 15 psi . All thw turbos and the wastegates are fine. The timing has been checked and is correct. Quote Link to comment Share on other sites More sharing options...
coupe Posted September 25, 2017 Author Share Posted September 25, 2017 We did a compression test . 90, 150, 50 150 yep motor is rooted Quote Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted September 25, 2017 Share Posted September 25, 2017 (edited) if the 90 and 50 are on the same bank(1 & 3 ?), maybe bent valves on that head? Edited September 25, 2017 by 1 Lucky Texan Quote Link to comment Share on other sites More sharing options...
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