16v misfire

[BlueLevin]

Hey guys, got a sprinter with a very freshly built bigport, and it misses on idle, it's not constant, comes and goes frequently, happens hot or cold

Key points to note, it's not the engine, I had the same miss on the old bigport and ignored it as this engine was going in
New dizzy cap/rotor
New trd leads
New plugs
New injectors
Has a used Bosch coil, ignitor is old
Fuel filter around a year old, barely drove car though
No idea about fuel pump and stuff yet

Sooo yeah, any ideas where to hunt next?

[Rice86]

new ignitor is a start, and everything else that is still "old" should be replaced if possible to eliminate what could be the cause if everything else has already been checked and confirmed as not the cause

[BlueLevin]

Was hoping to avoid replacing parts that are not in need of replacement

When i turn the key on so the fuel pump is on (without starting it up) I can hear something rattling a little in the engine bay, maybe a fuel line is loose or something

I'm going to replace the fpr as I have a spare and with any luck my fuel pressure was just low, goof to track down that rattle and inspect the whole fuel system ect.

Stupid intermittent misfire -.-

[Rice86]

Maybe old/bad fuel? Rust in the fuel tank? Who knows really

You'll find out when you do, good luck!! Lol