Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!

misfire cyl # 1

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2 months 2 weeks ago #66644 by joe briano
misfire cyl # 1 was created by joe briano
2013 venza 2.7 plugs and coils replaced was told #1 and #2 injectors switched did compression test 185 across the board did leak down test # 1 ok no leaks
car does burn some oil runs great at idle no misfire live data one or two driving around town starts misfiring at highway speeds also loss of power during misfire but comes back and runs great.
Also did back pressure test at cat 0 psi at idle 1to 2 pis at higher rpms next step is induction cleaning with seafoam and gas treatment ive read some post that a slipping serpentine belt can cause
false misfires but i would think i would get random not just a single cyl misfire need to know if maybe a software update might help if anyone has any sugestions on direction to go it would be muched apreached.

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2 months 2 weeks ago #66647 by Tutti57
Replied by Tutti57 on topic misfire cyl # 1
I wouldn't update the software unless there is a bulletin for something specific to your issue.

Have any circuit integrity tests been done? You can visually inspect the harness for damage, looking closely at bends and contact points. Possible pin fit issue at the connectors.

While the issue is happening you want to determine if it's missing spark or fuel, or if it's mechanical. How do fuel trims looks during incident? Misfires will lean the mixture, but double digit lean general indicates a fuel problem.
The following user(s) said Thank You: joe briano

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2 months 2 weeks ago #66649 by joe briano
Replied by joe briano on topic misfire cyl # 1
thanks for info idid check plug no corrsion and inspected wires fuel trim at idle were good i did record data pids while driving but wernt saved so couldnt reveiew next step is to check post cat o2 to identify type of misfire saw brandon steckler on how to do so
when i get the car back thank for your reply

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