Hey y’all, hope everyone is good on this fine Oct day. So I have a misfire that has me stumped, I’ve chewed through every misfire post mostly on here and even some others with vehicles that share my engine (2uz in a 2000 lx470).
I’ve got a rough idle, regular throwing of a p0304.
Weirdly it goes away above 1800ish rpm, at times won’t throw code but will flash CEL. Sometimes there’s nothing but you can feel a little stumbling. Also it’s hard to start like a hiccup or hesitation. Sometimes! Not always.
Sometimes i get a solid CEL with the trac lights as well.
Here’s the stumper: I’ve replaced all coils, swamped them around to diag and replaced fuel injectors, swapping them to diag. The CEL code always comes back p0304. I recently did timing belt and have put 2000 miles on it since tbelt, zero issues. (Did it myself, forgot to mention I’m an ambitious DIY mechanic).
Car info is well cared for and looked after 2000 lx470 w 353k miles (I want a million out of it!!)
Chasing gremlins with the coolant temp sensor and the pcv valve and grommet today. Also oddly on this mornings 40 min drive to job site it stumbled a little bit but then threw a 0300 and 0303, 0301,0304 but it’s only done that this once this am. Cleared codes while driving and alas that stupid 0304 came back. I’m praying someone can help bc this is my everything truck and also I love it. Thank you for any help in advance! Cruise on!
I’ve got a rough idle, regular throwing of a p0304.
Weirdly it goes away above 1800ish rpm, at times won’t throw code but will flash CEL. Sometimes there’s nothing but you can feel a little stumbling. Also it’s hard to start like a hiccup or hesitation. Sometimes! Not always.
Sometimes i get a solid CEL with the trac lights as well.
Here’s the stumper: I’ve replaced all coils, swamped them around to diag and replaced fuel injectors, swapping them to diag. The CEL code always comes back p0304. I recently did timing belt and have put 2000 miles on it since tbelt, zero issues. (Did it myself, forgot to mention I’m an ambitious DIY mechanic).
Car info is well cared for and looked after 2000 lx470 w 353k miles (I want a million out of it!!)
Chasing gremlins with the coolant temp sensor and the pcv valve and grommet today. Also oddly on this mornings 40 min drive to job site it stumbled a little bit but then threw a 0300 and 0303, 0301,0304 but it’s only done that this once this am. Cleared codes while driving and alas that stupid 0304 came back. I’m praying someone can help bc this is my everything truck and also I love it. Thank you for any help in advance! Cruise on!