Won't start when Cold. All systems check out Good

nope just the nature of the cold vs mechanics park her inside or get a warming device to heat her up a bit, you know antifreeeze can still freeze?

Will it sound like to me you have a two cold of a battery you need to keep a porable min battery charger/warm that my help and get a more stronger batterry 1000 cc will do that if you do not have that kind now and for more help buy your self a oil warm to and place it on when you no tuseing it that will help less stress starting and better for your motor easyer starts.. and turn off thing that you do not use when you not in the car sometime it drain battery to.

I hope I can help you with your question I believe I can first and foremost if you're having trouble starting your car on cold mornings it's probably going to be a clogged fuel filter or bad fuel pump about to go out you're having symptoms as you described and then whenever you're at 55° things start to warm up and you can start your car okay the filter is so clogged up imagine that look looking like a blood vessel okay when you have a clog in it it doesn't allow the blood to flow freely feel the same way

go to villager quest yahoo group for expert help. Sounds like a dirty MAF sensor. Clean heated wires with carb cleaner.

TPS readngs are good.

fuel pressure should be 43 engine off, and 34 engine running.

try disconnecting front oxygen sensor for a day & see if better.

Read All ABut files at our site.

gerry

make sure you coolant level is topped up.this happened to me once.it was just low coolant not allowing enough to circulate thru the heater

Safety Recall No. 790
Fuel Rail O-Rings and Reinforcements
have this car checked for the (TSB) technical service bulletin this will help you start the car in cold weather -- too try this before you start the car turn key to on position then back off 3 times each time you should hear a hum from the electric fuel pump-- and if it starts up better then the recall will help you his recall applies only to the above vehicles equipped with a 3.5L engine ("F" in the 8th VIN Position),Thanks, Lee Davidian

it is likely air flow if air is cold enought it can super cool a rad if you cover part of the rad partialy and the heat starts to come then slowely cover it more and more untill it hits the proper heat range

the first thing you need to do is park your vechicle on a level surface a make sure the trans fluid level is to the full cold line if it is not fill to full cold line with vechicle running and in park the retest

Hi!
Looking at your brief description can I guess that when warm the starter turns slowly? as if a flat battery?
If this is so then the starter windings and armature are possibly cooked??
Have you recently tried cranking the engine too much? or with a poorly charged battery?
When cranking the starter gets very warm and if not left to cool after 5 seconds of cranking can cook the wiring/armature internals of starter.
When your engine is cold the Windings/armature are too so will turn easier, but when warm all internals are expanded so more drain and heat! then causing the starter to revolve slowly taking a lot of power from engine and ignition circuitry.
This can also be caused from trying to start a vehicle with low battery, Volts go down Amps go up cooking/frying the winding/armature.
I am suggesting this as all I have to go on from the description STARTS COLD BUT ONCE IT IS WARM???? I hope this helps,
If it does please remember to press FixYa button as I have taken a lot of time to post the response.
Good Luck!
Paul 'W'
Onyer~EDSon(:0)~[><U.K.

have you tried to jump start it ? has it started since?
turn on the light's and try to start it..... do the lights go dim or off?
extreme low temp's can kill a new battery and an older one even faster
wind chill here whewe i live -22 the other night and my truck almost didnt start.