coolant temerature sensor readings

[peter535]

So my car has problems starting when its cold, it takes a few cranks before it starts
i just logged my coolant temerature sensor and it reads 110* on start up can anyone tell me if thats too high or too low?

 

[eeeewidner]

Your coolant temp readings shouldn't be that high upon initial start-up.

 

[peter535]

what is it supposed to be?
and it was like 20 seconds after start up

 

[eeeewidner]

They should be close to ambient temperature upon start-up. Then it should rise after about 5 mins of warm up. What are your 02 sensor readings. At start up (cold) they should be closer to 9.

 

[peter535]

coolant sensor is at 170 to 200 it just keeps on changin, the car had been warmin up for 10 min
and the o2 sensor is 0.02v

 

[eeeewidner]

Your 02 sens readings will change once the car goes into closed loop. However, Ideal readings for the o2 sensor would be .4v warm and it will fluctuate from that to .6 or .7v. anything higher means you are running rich. Sounds like you are running very lean. Check for boost leaks and check fuel pressure....

 

[peter535]

What about the coolant sensor reading is that ok?
i wanna do a log run what sensor should i monitor? and whats the best gear to do a log?

 

[peter535]

at part throttle my wideband reads 11.4 and wot it reads 12.5

 

[eeeewidner]

I couldn't tell you as of what the readings for a wide band are but stock I do know.... Always pull a log when the car is fully warmed up and in second gear. Drive it until you can't go any more in 2nd. Get a log and post it.

 

[peter535]

ok what should i log?

 

[eeeewidner]

02, Ltft, Stft, Tps, Timing, Rpm, Knock, Cool...

 

[peter535]

ok thanks allot i dont have time to log it now but i will post it later on tonight