Old gas now missfiring
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When car gets warmed up, it stalls and eventually shuts off
When my 99 civic is warmed up RPM jumps stalls and eventually dies down. If I starts again I have to hit gas or it will die down again. If engine is cold runs fine.
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Re: When car gets warmed up stalls and eventually suts off
p0303, P0304, P0300, P1399
These codes are for misfire
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Ran with old gas now misfiring
I had 3 gallon of gas sitting for 5 years. Without thinking put it in my 99 civic gas tank mixed with 7 gallon of new gas. Since then car is stalling and now check engine light is on. Took it to Autozone and got misfiring codes. When car gets warmed up dies. Cold engine starts.
What could be wrong? Where should I start?
What could be wrong? Where should I start?
#7
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Re: Ran with old gas now misfiring
you probably should drain as much gas as you can, then refill with new gas, and use the fuel system cleaner (that you buy at schucks), and if the problem keeps happening, use motor flush, and do a tune-up, oil change, coil, spark plugs etc...
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Re: When car gets warmed up, it stalls and eventually shuts off
Judging by the fact that it only happens at operating temperature, I would be pointing the finger at the o2 sensor. The o2 doesnt send signals to the ecu until it reaches operating temperature and the o2 could be telling the ecu bad signals making it run rich and hard to start...
#10
Re: When car gets warmed up, it stalls and eventually shuts off
Judging by the fact that it only happens at operating temperature, I would be pointing the finger at the o2 sensor. The o2 doesnt send signals to the ecu until it reaches operating temperature and the o2 could be telling the ecu bad signals making it run rich and hard to start...
The O2 sensor sends signals to the ECU all the time. The ECU just ignores the signals until the ECT sensor indicates the engine is warmed up.
In general, an engine will run fine on a rich air/fuel mixture. A lean air/fuel mixture, however, will make the engine run poorly. When a bad O2 sensor has the latter effect is when performance suffers.
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Re: Ran with old gas now misfiring
Went to mechanic and did compressor test. He said needs to take out had and thinks its valve might be damaged or clogged. He want $1000 so before I give green signal just want to make sure.
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Old gas now missfiring
Had 3 gallon of gas sitting for 5 years. Without thinking put it in my 99 civic gas tank, mixed with 7 gallon of new gas. Since then car is stalling and now check engine light is on. When engine warms up car stops running if rpm goes below 2000 and the engine dies. Cold engine starts.
Took it to Autozone and got misfiring codes. When car gets warmed up it dies.
What could be wrong? Where should I start?
Took it to Autozone and got misfiring codes. When car gets warmed up it dies.
What could be wrong? Where should I start?
#15
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Re: Old gas now missfiring
you probably have lots of condensation/water inside of the old gasoline which is why this is happening. All you can really do is either drain the tank or drive the car at slightly higher revs until you burn off the fuel. If you can get a code reader, find the code and see what it says, prolly will say something like lean-fuel mixture trim some other such crap.
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Re: Old gas now missfiring
you probably have lots of condensation/water inside of the old gasoline which is why this is happening. All you can really do is either drain the tank or drive the car at slightly higher revs until you burn off the fuel. If you can get a code reader, find the code and see what it says, prolly will say something like lean-fuel mixture trim some other such crap.
p0303, P0304, P0300, P1399
These codes are for misfire
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#24
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Re: Old gas now missfiring
also try changing your fuel filter first run some HEET or some crap trough your car seafoam it even than change the fuel filter and than get back to us
#25
Re: Old gas now missfiring
Drain it and just run it in a lawnmower or a flamethrower. Don't throw too many additives in, but the HEET is a good idea, it'll absorb moisture. Over time, the volatiles evaporate off from gasoline and it leaves behind a varnishy buildup. Next fresh tank, definitely run some good fuel system cleaner through, like Chevron Techron.