Also, glowplug light comes back on after start-up for about 40 seconds.
Oil level is OK, and coolant level is OK. Left exhaust blows a little black
as well. It all began during cold weather. I'd take it in to the Smart guys,
but I'm nowhere close to a dealer.
How many miles? One thing is with diesel engines the glow plugs do come back on till engine hits a low warm temp when it's cold out. You may see the light come one once or twice after it's first started.
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Is that a low oil pressure light or a silly Check Engine light? Check the engine oil level and the automatic transmission fluid level. If those are ok, it could be a bad filter or the wrong oil, possibly a bad sending unit.
BTW, there's no need to let that engine idle up to temperature even in cold weather. A minute is quite sufficient as long as you have oil pressure. Otherwise you're wasting fuel and creating more pollution since the engine efficiency is lowest at idle.
Follow your glowplug wires towards the Firewall. The glowplug wire goes into a Timer which is suppose to be internally regulated by outside Temperature and feedback from the glowplugs.
When you are in Cold weather, the Timer is suppose to keep the glowplugs on longer. When the engine is fully warm and you shut it off, you will notice it starts up like a gas engine. First you want to remove your glowplugs and check them by using Jumper cables and heating them up.
Be careful because they can melt or distort if on too long. I usually pull out 4 at a time because it is a comparison test and when you find the quickest, brightest glowplug you measure the others against it. When the glowplug stays dark or does not heat as quickly it is bad. Remember when it is in the engine the glowplug only has bumps of current coming from the Timer to warm up.
Once you are confident the glowplugs are okay, try starting the truck. Or for good measure, just change the Timer, but it will add to the cost.
As for the engine light, if you mean the "check engine" light, you can get that checked free at Autozone, Oreillys, or Advance. I believe Advance may be better equipped to test the PCM.
I hope my solutions are very helpful to you and thanks for using this service.
The coolant reservoir is on the passenger side of the engine compartment. It should have a radiator cap on it. The design is not very good, because it can be a little tough to see exactly what level the coolant is at. Just look through the side and shake it to see the general level of coolant.
For the oil reminder, reset it by following these steps: -Turn key to the run position(where all the lights come on but don't start the engine) -After about 1 second, press the accelerator pedal all the way to the floor and let it come all the way up 3 times within about 5 seconds. -Then turn the car off.
It won't work if the gas pedal does not go all the way down and up, if you go too fast, or if you don't turn it off afterward. Watch for the small red dot light to go out as an indicator for success. You will probably have to try it a couple of times before it actually resets.
some cars with oil level warning light on, it doesn't mean that its only reading the engine oil level is low, sometime the transmission fuid too. Did you check your transmission fluid if it is ok or not? try to check and let us know, ok.
If it is top left of the control panel and has a little thermometer in the middle of it, then its the transmission oil temperature light.
"In some markets, this bulb will temporarily illuminate to indicate the bulb is working when the ignition key is moved to position 2".
Generally, if its on for less than a couple of seconds - all is fine. If it stays on whilst driving then your transmission oil is too hot (hot weather, handbrake left on, punishing the engine etc ....).
If it comes on, check the oil temperature guage, and slow down. If it remains on, stop the vehicle and do not continue until it has extinguished.
Always try to get to the root cause of this fault, as it may be something more serious, such as loss of coolant (leading to engine seizure). Never check the coolant level on a hot engine - serious risk of burns injury.
Did you check the oil level?? Which i am guessing you did, it everything is running good and no change in engine performance or bad noise's coming from the engine. Then it's going to be your oil pressure sending unit, the oil pressure sending unit is inexpensive and you can pick it up at Auto Zone far less then the dealer and Auto zone will have the step by step instruction to replace the oil sensor. It's going to take just under an hour or less depends on how long you want to let the engine cool down before you work on it.
Good luck and hope this helps. keep me posted, be glad to help.