K11 1.0 struggles to start when warm or after few minutes

[ElonMuskio]

Hello everyone, first post here and I've found some really good infos around this forum but nothing that can really relate to my problem.
I've bought a 1997 K11 1.0l in december 2023 and it has always started great when cold but not when warm, I have to crank the key at least 2-3 times before it would start. I've read that it can be related to anything from the dizz cap, a cold solder joint in the throttle body or it's simply overfueling and I would need to fit a resistor in parallel to the engine temp sensor.

The car runs ok it doesn't cut off or anything. I've tried using a little bit of throttle when starting warm but it doesn't really make a difference so I would exclude the throttle body solder joint fix.

Does anyone have an advice on what to check first? Thank you very much

 

[FinnishCoffee]

I would look at the idle air control valve and throttle body waxstat.

 

[DozyB]

A short note about this possibility.
My K11 became a slow starter when hot. A compression test revealed a low one on #4.
Inspected valve clearances, OK. Looked thru spark plug at piston, Very clean compared to
others. Maybe # 4 injector draining residual pressure when stopped. ( May cause very rich
mixture when hot= possible hard start ??). Serviced all injectors and fed injector cleaner
through them. Stuck into ultrasound bath as well. Reassemble and test.
PROBLEM SOLVED !!!.