My Weird Problem. Click Here!

June 20, 2009

I know that there is someone out there having the same problem as mine but already solved it. So please any suggestions will be greatly appreciated.

Here is my Case:

The car idles high when you just started it in the morning or whenever the engine is not in its normal running temperature. About 1800-2000 rpm and that is high right? The car runs smoothly when the engine is cold. It gives you the speed you need, no missfire and seems to be in a very good condition but after driving like 15 min, thats where the real problem starts.

When the engine gets hot, the car idles lower and lower until the engine stalls but doesnt die(you know when your running then pressed the clutch, the rpm goes down until you get the feeling the its about to die and goes back up again), you can feel the sudden loss of power, you can hear weird sounds from the muffler at random times when it idles(I cant explain it but its something like the sound of unburned gas or a cough) and lastly, it starts to sound like a V8 engine with an aftermarket muffler LOL. It has the same sound as if Im only running in 3 cylinders.

Here is What i have Checked/replaced so far.

New Spark Plugs

New Spark Plug Wires

New Rotor

New Battery(last one wasnt charging nemore)

When it starts sounding like running in 3 cylinders only, I checked all 4 sparkplug wires for sparks and they all have.

Im wondering why the problem starts when the engine gets hot. When it starts to sound like a V8 engine, I think its because im not burning all the gas and im running too rich. I was thinking that the spark gets weaker as the engine/coil gets hot.You think its because of a failing Ignition coil?

My car is an ST182 with a 3sge engine.

June 20, 2009

I know that there is someone out there having the same problem as mine but already solved it. So please any suggestions will be greatly appreciated.
Here is my Case:
The car idles high when you just started it in the morning or whenever the engine is not in its normal running temperature. About 1800-2000 rpm and that is high right? The car runs smoothly when the engine is cold. It gives you the speed you need, no missfire and seems to be in a very good condition but after driving like 15 min, thats where the real problem starts.
When the engine gets hot, the car idles lower and lower until the engine stalls but doesnt die(you know when your running then pressed the clutch, the rpm goes down until you get the feeling the its about to die and goes back up again), you can feel the sudden loss of power, you can hear weird sounds from the muffler at random times when it idles(I cant explain it but its something like the sound of unburned gas or a cough) and lastly, it starts to sound like a V8 engine with an aftermarket muffler LOL. It has the same sound as if Im only running in 3 cylinders.
Here is What i have Checked/replaced so far.
New Spark Plugs
New Spark Plug Wires
New Rotor
New Battery(last one wasnt charging nemore)
When it starts sounding like running in 3 cylinders only, I checked all 4 sparkplug wires for sparks and they all have.
Im wondering why the problem starts when the engine gets hot. When it starts to sound like a V8 engine, I think its because im not burning all the gas and im running too rich. I was thinking that the spark gets weaker as the engine/coil gets hot.You think its because of a failing Ignition coil?
My car is an ST182 with a 3sge engine.

sounds like the leads or coil to me that is where i would start. usualy you get a small missfire when the leads are going or when the coil is.

however the isue with the high rpm sound like a timing sensor or ignition sensor ( not sure which sensor) basicaly they are designed to check the rpm and addjust fueling ect to stop a stall so sounds like that may have gone. good way to test is to pile some revs on for about 5-10 secs then come off sharply if it is the sensor then the engine will almost stall before juddering itself back to life.

best bet would be to check evrything ive listed and that way if it isnt you can rule them out!!