When i start it i dont know if its cause its cold out but it dies. when i rev n hold the rmps at 1000 4 a bit it will hold on running but if when i just rev it after that it will die

More likely the battery, try starting the car with no electrics running (interior light, fans, wipers etc.) when it fires rev it up a few times and let it idle for a bit before pulling away if it runs fine after this you can use you electrics as normal . if its an auto pull away slowly if its a manual pull away with more revs than normal but very slowly engage the clutch.

try injector cleaner or newer fuel cleaners, try octane booster, sounds like a fuel delivery symptom but the temperature factor is a worry. I would guess injectors.

Well this answer is going to be a bit fuzzy.
Code 51 is for a switch signal issue. The possible causes are the throttle position switch, the neutral safety switch, and the ac compressor switch. One of those three is not sending a signal to the computer. So if its the ac switch, you know why.
But all three would need to be checked out.

Sounds like a coolant sensor problem. It signals the ECU for open loop, cold start rich, high idle, until warm up is reached.

A similar thing happend to me turns out it was the idle rev cold switch thing>
basically the switch which provides more fuel and revs when the car is cold, so that when you start the car it doesnt just die off.
the switch itself is a bit mechanical and is perhaps jammed on the full on position. If it happens more when the car heats up. then it is this switch.

what you can do is start your car one cold morning and see how high the revs are, if its still high then its probablly not the switch

sounds like the fuel line still has air in it. this should correct itself if you can get the engine to run long enough. fuel pressure builds on the pump side of the fuel rail and when there is an exess ammount of pressure (lack of fuel consumption) the fuel regulator should send the extra gas back to yhe tank to run thru again. try holding down on the accelerator when starting this should send extra fuel to the injectors and may help "prime" the line. you cant flood the engine so dont worry about that just dont over rev the cold engine. this should clear up on its own. the only other thing it could be is an obstruction in the fuel filter or the inlet sock on the in tank pump. if thre was a lot of sediment in the tank it got sucked up withe the last bit of gas in the tank, you may have to change out the filter.

the idle air control valve may be bad or just needs cleaned out. idle air control valve acts the same as a choke. if it is messing up it will cause engine not to run right.

Does it run rough when stalling at 1000rpm or does it seem like the rev limiter is taking over (just revs and stope). If running and just stopping you man wanna have your ECU reflashed (common problem). If running rough you may have some other issues and need a diagnostic. Try going to your local auto parts store and having a code scan (its free) and see what codes if any are present.

either its vapor locking or its the fuel pressure regulator

hi there
sounds like you need a tune up or you need your injectors cleaned
so i will help you clean them with out getting your hands dirty but you need to follow me every step of the way.
first i will give you my tips

1. get a high quality fuel injector cleaner that you put into your fuel tank
2. make Shaw you have just under a full tank of fuel
   
3. while i never say that one should drive a car like it is a toy you are going to have to do some harsh exhilarating during this
4. 1000rpm is 1 revs on your dash bored so if i say do 2500rpm it means do 2.5 on your dash (that's only if you dot know what rpm means)
5. never turn the car off while we do this
   
6. please do not speed you put your life and others at risk
7. please do not drink and drive

OK now for the step by step instructions

1. have what you need ready to go including the injector cleaner
2. start your car and let it warm up keep the revs just over 1000 rpm
3. as the car is running add the fuel injector cleaner
   
4. when you have done this i want you to increase the revs to about 2000rpm
5. keep it like this for about 30 seconds
   
6. after the revs are back down to 1000 rpm i want you to get ready to take it for a drive
   
7. OK so take it for a light drive around your street keep it very close to home as if your car stops you don't want to have to walk a long way
8. once you have done this for a while and you feal confident i want you to be a bit quicker in exelarating giving a bit more power remember dont speed
   
9. now once you have done this i want you to take her home and let it idle for a bit
   cause you need to get ready to go for a long drive
   
10. now that you have got to the bathroom and are ready to go i want you to find a nice open road where you can do 60mph
11. now that you are here i want you to act like ther is a road train in front of you doing 50mph
12. now i want you to overtake this road train applying full power by pressing fully dont on the gas
    
13. once over tiaken slow back down
    
14. i want you to do steps 11 to 13 twice at least
    
15. now go back home and let me know how it went
    

now something to remember for alwase

1. as stated i dont think you should race or rev the motor all the time to high once a month give it a good run this will loosen and clean all the rubbish from the motor and everythink will run freeley like it should
   
2. dont drink and drive
   
3. dont speed
4. saty safe on the roads you life is to valued
   
5. and let me know all progress as i want to know if it helped as i pout in a lot of time and effort to helping people on this site
   

stay safe and happy new year
ricko

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