4.6 intermittent stall?

[cjben]

2004 4.6 125,000 miles. Every now and then the engine just stalls for no apparent reason. My girlfriend said it did it 4 times on the way home tonight. Always starts right back up. Idles smooth,drives great. I will pull codes tomorrow but the check engine light isn't on. Any body have this problem before?

 

[eeprete]

how is your fuel filter?

1. check for codes
2. check the basics (air, fuel, spark)
3. check fuel pressure

 

[FordFool2]

Our 4.6 2004 experienced 2 different episodes on dying. The first was at stop lights, the engine would occasionally struggle and die. All it wanted was fresh plugs.

The other time it died while driving. We could restart it until one day it would not. That turned out to be a bad fuel pump.

 

[cjben]

Just hooked up the code reader,no codes stored in the computer. Where is the schreader valve to check fuel pressure? does this engine have one? I looked for a minute on the fuel rails,couldn't find it.

 

[cjben]

OK just finished looking EVERYWHERE for the shcrader valve...doesn't have one. Does anybody know when ford stopped putting the valve on the fuel rail? Is there another way to test fuel pressure that isn't too terribly expensive?

 

[cjben]

Ok. update: I drove the explorer today for about 30 minutes, and the only time I could get the stalling problem to repeat itself was when I had the cruise set at 35-40 and pushed the coast button,it would die around 33-35 mph. When it stalls, it shuts off just like the key was turned off,no stumbling or anything. It will not die at the same speeds without the cruise set. Damned thing runs great otherwise. We have owned it for 2 months and put 6,000 miles on it in without a problem. Any ideas?

 

[lincolnshibuya]

start with cleaning the throttle body