07 yukon 5.3 wont start
180 Views 5 Replies Latest reply: 2024-04-26 11:50:17
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Level 2
(11) points
Hi my 07 Yukon 5.3 won't start unless I press accelarator pedal, if I try to start it with key it only crancks, I have no codes.Tags: mini
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Level 9
(3774) points
Hi, check the accelerator pedal sensor or the throttle position sensor first, when OK
check fuel pressure and ect sensor for giving the right temperature. -
Level 2
(11) points
Fuel pressure stays at 50psi koeo, 61psi koer, ect sensor seems ok, I get service trac
light. With p0106 code changed mapsensor, checked wiring, all seems good. Somthing
is definetly wrong -
Level 9
(3774) points
Hi, does it run immeadeately when you spray fuel into the inlet? If yes I suspect the
ecm ,check wiring and connectors ecm and ground connections. -
Level 2
(11) points
Ecm stopped communicating with modules and scanner not detecting it, all power to
ecm is good ground also good relays are good,I think its the ecm need new one
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Level 9
(3774) points
Hi, before changing ecm, check the under hood fuse box ,wiring from the fusebox and
the relays ,it is a weak point and sometimes gives this kind of troubles.
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