Steve_Heley Evening all.. Have a miss fire on my z22yh, not long since had a new high pressure pump / plugs / coil pack / timing chain and compression is good / even across all 4. Want to check the fuel pressure from the tank pump. I believe you take this off the pressure valve on the high pressure pump? is the fitting a standard size? (what is it).. Thanks, Steven.
Steve_Heley Just an update to this.. removed the o2 sensor on the manifold / cat and it appears the cat has collapsed inside..
Steve_Heley Let's hope so.. Soon as i took the o2 sensor out and started it, it revved freely, no miss fires or fault codes.. Certainly a good starting point before spending on coil packs etc.. A lot more big chunks came out, but it gives an idea..
HarleyPete Well that's a useful point to note if mine ever plays up like that. Glad you seem to have found the issue.
