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We installed a Delphi pump but I am not sure what brand was in there before, no markings on it.

It was indeed the fuel pump. Thank-you everyone for your responses, they were all greatly appreciated!

It did not bog down on hard accelerations. We drove down the QE2 doing 100 KM and no issue. We went into a business park, doing 50KM and It just suddenly started to sputter and then quit. We had it towed home. We let it cool down and it always starts again. I can start it successfully every...

Would a failed O2 sensor cause these issues?

Is there a way to test the fuel pump other than pressure at the rail?

I had the pump replace a few years ago but maybe it is bad again... If it was the cranskshaft position sensor, would I not get a code P0335 or P0336 or both? Or can it still fail and no code is presented? I just drove around (and around and around) my neighbourhood for 1 hour with no problems...

I was told that was the difference between the two. I guess the person that told me was wrong...

I did have a look at the coil, but did not take it out. I will do that. My reader does not do live data but I think I have to go and buy one to check for the RPM when it dies. This morning: I unplugged the AC and started the vehicle - it ran fine - 32 at the fuel rail. Plugged in the AC but...

Yes. The one that feeds the gauge is actually considered a switch while the other one is the coolant temp sensor. I was just meaning that my vehicle never has heating issues.

The pressure at the rail has always been around 30, except yesterday (daily temp was 33.5 C) when it was 0 and now this morning (23 C) it was 32 and the vehicle started. However, ambient air temp should not affect it. I will have to check all the spark plugs.

Good Morning! I let my Explorer sit overnight with the battery cables disconnected. I just went out and reconnected the battery and it started like normal with 32 pressure at the fuel rail. It must have something to do with heat - perhaps the coolant temp sensor is to blame but the gauge never...

I will check the coil.

Thank-you everyone for your responses! They are greatly appreciated!

I will try that.

I did not clean the throttle body but when I took off the IAC I looked at it and it didn't look dirty. I will pick up a new air filter.

"If it doesn't crank at normal speed, I am wondering if you also have a sticking AC clutch as it should not be engaged when cranking the engine, and trying to power the compressor when cranking, could account for slower cranking." Sorry, I misread the question about fast cranking. It does crank...

"If you have no fuel pressure turning the key to the run position (not trying to crank it yet), you do have a fuel problem." Today is the first time I have had no fuel pressure. I don't ever buy Costco gas, but fueled up there the day before all these problems started......

What should the temp sensor resistance be on a cold engine?

A new fuel pump was installed about 5 years ago, but perhaps that is the issue. I have a code reader - no error codes but not a scanner tool.

I am able to turn the AC clutch by hand, it is quite stiff but it turns. Also, when I went out just now, the Explorer won't start and there is no pressure at the fuel rail whereas the other day there was 30.

I did clean the IAC valve, it was a bit dirty but not bad. It won't restart for 2 to 3 hours and then it does. It doesn't crank fast nor does the belt slip - it rotates the pulley.

Yes, it gets very cold.

Hi, My Explorer keeps stalling and won't restart until I leave it for 2 to 3 hours - had to have it towed home last week. Today I let it idle for about 10 minutes without the AC and it didn't stall. However I turned on the AC and about 5 minutes later it stalled and of course now won't start...

Thank-you for the reply! Voltage is good and lock/unlock now works great. A "good lube" did the trick.

Hi, I recently replaced the rear liftgate lock actuator as the old one would no longer unlock the liftgate. Now when attempting to unlock the liftgate, sometimes it unlocks with one press of the button (in the vehicle) and sometimes it takes 2 or 3 presses. I do not have a remote. Is it a...