[dinh_hai_tran]

Hi experts,
Ottawa, Canada weather is getting cold now, my car is quite difficult to start in the morning, this problem seems to occur only cold morning after that it's OK during the day even I park my car all day at work (maybe temperature getting warmer during the day because of the sun). After searching in this forum and with my guess, it's fuel regulator or maybe fuel check valve. Someone suggested cold sensor but I didn't see any cold sensor for this car.
I have S420 1994. All spark plugs+coils+wires are new.
Any suggestion(s).

Many thanks,

 

[slowhands]

Eta

sent from my HD2 running Android 4.1.1

 

[dinh_hai_tran]

Throttle boby was rewired awhile ago and should be good, no more ASR light on. MAF sensor was just clean.

 

[95Scoupe]

It should have two temperature sensors at the front of the intake (under the smaller front shield). The one that sends engine temps to the computer is closer to the passenger side. I believe you test it with an ohmmeter but I don't have my CD manual at work to see what values at what ambient temps it should have.

 

[lcmlee]

Hi experts,
Ottawa, Canada weather is getting cold now, my car is quite difficult to start in the morning, ...QUOTE]

When you say difficult to start, do you mean it take a few tries to start the car? Or it starts and runs rough and smooths out after a while?