l-Jet 323i e30 hard to start (cold)

[BMC227]

Hey guys,

I've got an e30 323i and i've been having trouble starting it every morning.

When cold i need to crank it over 5 times to get it started, first 3 attempts there's no sign of starting, 4th attempt it'll start then turn back off after 30 seconds, 5th attempt the car starts fine.

I've changed the fuel pressure regulator, fuel pump, checked all relays, coolant temp sensor has also been replaced. I can't seem to find the problem, some people think it could be a faulty TPS switch but before i go purchase one i thought i'd ask you guys. It's getting pretty annoying because i drained my battery this morning and was late to work!

Thanks in advance.
Was.

[BMC227]

bump bump bump

[MR.LUGO]

Have you checked spark plugs, coil..fuel filter.

[BMC227]

Fuel filter was changed last week, spark plugs haven't been changed and coil was changed last week along with filter.