Benjaminkock86 Posted February 16, 2015 Share Posted February 16, 2015 Hi there,My glanza is doing the following.When full throttle on high boost and reaching 4000rpm the engine suddenly does like if it cuts out on fuel, like when you run empty on fuel ver badly and right away the engine light turns on.It doesn't do it when full throttle on low boost.And if I slowly throttle on hi boost to 4000rpm it doesn't do it.No mods on engine. Only a BOV. No jam fcd or anything like that.Anyone any clue what the problem is? Quote Link to post Share on other sites
akyakapotter Posted February 16, 2015 Share Posted February 16, 2015 Fuel cut bud your getting boost creep do a diagnostics test to confirm http://www.toyotagtturbo.com/forums/showwiki.php?title=EFI+self-diagnosis+system Quote Link to post Share on other sites
Stu Posted February 16, 2015 Share Posted February 16, 2015 Whats your boost gauge reading? Quote Link to post Share on other sites
Benjaminkock86 Posted February 17, 2015 Author Share Posted February 17, 2015 I thought about doing a diagnostic test as I was thinking about fuel cut.But here's the randomness: today it suddenly stopped doing it and running back to normal with full throttle on hi boost.Would it be the map sensor having reading problems?Or if fuel cut, do I really need to install a jam fcd? How does it work? I'm not much experienced in tech...Unfortunately i don't have a boost gauge yet installed. It's fully stuck glanza.Greetings from Aruba! And thanks for taking the time and helping me out in figuring this thing out Quote Link to post Share on other sites
akyakapotter Posted February 17, 2015 Share Posted February 17, 2015 Do a diagnostics test bud takes seconds with a paper clip if there is a code stored will tell you what's at fault,A jam fcc clamps the voltage to the the map sensor just before fuel cut tricking the ecu to let you up the boost. but you will need a rising rate fuel pressure regulator to adjust the fueling to suit more boost. Quote Link to post Share on other sites
Stu Posted February 18, 2015 Share Posted February 18, 2015 Does it cut out when the air temperature is cold, but doesnt when its warmer? In which case its boost cut. Colder air is denser. Quote Link to post Share on other sites
Benjaminkock86 Posted February 18, 2015 Author Share Posted February 18, 2015 Thank you all :-)by the way Aruba is 365 days a year (everyday) lowest temperature at 31 degrees celcius. Meaning we only have one season, which is everyday sunny day with a lot of breeze and high temperature. Quote Link to post Share on other sites
Stu Posted February 18, 2015 Share Posted February 18, 2015 Ha possibly not air density related then Quote Link to post Share on other sites
GP82 Posted February 18, 2015 Share Posted February 18, 2015 You should get the boost guage reading as said above to rule out fuel cut and do a diagnostics. Also worth inspecting your distributor cap for cracks, rotor arm, spark plugs, leads, you can also test the coil pack. Quote Link to post Share on other sites
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