Random difficult start engine when the car is warm

45

Asked by Jan 07, 2017 at 10:07 PM about the 2006 Chrysler Sebring Touring

Question type: Maintenance & Repair

Car: 2006 Sebring 2.7 v6.   
Issue: random can't or difficult start again when the car is warm.  
description: This never be happened whtn the car is cold. this doesn't
happen each time, but some time I drive 15 minutes, and pack 1 hour, it a
little difficult start, and then drive 15 minutes again, pack 30 minutes, still
fell start issue, drive 15 minutes and pack 20 minutes,  difficult to start,
maybe try 3 or 4 times, drive 7 minutes and pack 20 minutes, can't start
any more, the yellow Malfunction indicator Light come, read it means
"random cylinder doesn't work", try pack more time and try more time start,
it can running again, but it can fell some shake. one or two week , the light
will turn off again.
Before this problem, this car had about more than 100 hours coolant
boiling in reserver withing 3 months, finally find this issue is thermostat
can't open, change thermostat the problem gone. And then the new engine
start problem came with that moment.  
Before the coolant boiling, the spark plugs were all replaced, they never be
replaced I think. But I couldn't change the spark plugs cables, they are
looks like someone DIY them(see the photos), wrapped with black tape, I
think they are not the reason for difficult start.
I find a Youtube video said problem is "timing chain tensioner", I don't
understand the video,  address is here https://www.youtube.com/watch?
v=6Ysu9IyCGME . could someone give me some idea? thank you and
blessing.  
The cables photo:

2 Answers

45

I recently find the coolant overheat again, what I find the gauge read about 64-68 °C, but the OBDII read is 88°C, so even if the coolant got boiling, the fan not running normally, some super one can tell me, how many temperature sensor in this type car, why the gauge not following the correct temperature and the fans can't turn on in correct degree? I guess I should change cable first, please give some good idea before I waster time again?

45

It looks superman still not see my post :), I add some new situation for this issue: Now, I know there are two temperature sensor in this car, OBD temperature close to thermostat in engine bottom, the second temperature sensor in the blood housing room(top of the Coolant system). After I change the blood housing again, it looks the issue is same, I confirm the fan start in correct point about 90°C(gauge reading) and it can control the temperature and keep stable. but when it run for 20~30 minutes, the gauge always in 90~95°C, but the OBD temperature is stay in about 105~115, it means in part of engine, the coolant maybe boiling , so my coolant will boiling to coolant reserves, when the car running in this temperature, I stop the can, turn off the engine, start it, it can start no problem, but if I stop the engine for 5~30 minutes, the gauge stay about 80~85°C, the OBD temperature reading in 95~105°C, the engine can't start, should press the accelerator to keep the engine running, and the engine warning light can show in dashboard, it read some engine failed working, keep this for one minute, the engine run as normal... Why the two temperature has about 20 degree difference? and the engine running like this?

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