1989 300ce
I'm trying to chase down a warm start issue. Starts fine cold. Starts fine fully hot. Won't start if I shut it down before it gets fully hot. If I let it cool down again it starts no problem. Runs fine otherwise.

I've checked the CIS temp sensor and it seems to read low
ie. @ 23C it reads 3.5kohm instead of 2.5kohm so it reads for approx. 10C
@ 80C it reads 0.650kohm instead of 0.325kohm so it reads for approx. 60C

Are these readings in the range of acceptable error or would they be enough for a warm start problem?
I believe at 80C CIS goes to closed loop and no longer uses enriched start. If the ECU thinks that coolant temp is 60C and it actually is 80C would it use enriched start and create my warm start problem?

Thanks
Jorg