[Mando95]

the problem is when my car is cold and i crank it up and begin to go it stumbles, but once it warms up and ive been driving for about 3 mile it goes away and works fine and it wont do it again until the car is compety cooled down and suggestion? it just started doin it

 

[ReverendDexter]

How long do you let your car warm up before you drive it?

 

[Mando95]

well usauly i just crank it up for about a minute then take off whats funny is itll rev up fine just when its under load is when it does it

 

[2002BLGT]

well usauly i just crank it up for about a minute then take off whats funny is itll rev up fine just when its under load is when it does it

Whats done to the car ? Check engine light come on ? aftermarket MAF ? gives us more info on the car , how many miles on it ?

 

[Mando95]

yes the light is on the ony thing done is cobra intake, o/r hpipe bbk headers and flowmaster the car has 120,000 on it

 

[Bullitt95]

Cold start driveability problems are often caused by either a faulty ACT (air charge temp.) or ECT (engine coolant temp.) sensor. You can test these sensors by going to:

Ford Fuel Injection » Air Charge Temperature (ACT)
Ford Fuel Injection » Engine Coolant Temperature Sensor (ECT)

 

[Trick Tuners]

clean the maf. On cold starts the car will run off the maf until the o2 sensors get hot and take over. Rule out vacuum leaks too.

 

[Mando95]

i was planning on doing that today. Ill let you know if it fixes it

 

[WildWill]

You need to let your car warm up for a good solid minute or two before you drive it. Don't just get in and go... These aren't new cars man...

 

[Mando95]

Yeah i know but it just started doin this. But your right it not a new car

 

[Mando95]

Finally its running right it was the coolent temp sensor replaced it and worked fine