Hesitating to start
#1
05-17-2010, 11:00 AM
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Location: Albany, GA
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#2
05-17-2010, 01:08 PM
Fuel pressure when you first turn the key on. (but don't try and start.)
Try this: When you go out to your truck first thing in the morning, turn the key on, but, don't try and start it. Do you hear the fuel pump run? (you should....) If it does, cycle the key off, and then on, one more time, this serves to prime the fuel rail.... if on the third cycle, the engine fires right up, there's your problem. Either the check valve in the pump has failed (which holds pressure on the rail for a while) or the pump itself is getting weak.
See what happens with that.
Try this: When you go out to your truck first thing in the morning, turn the key on, but, don't try and start it. Do you hear the fuel pump run? (you should....) If it does, cycle the key off, and then on, one more time, this serves to prime the fuel rail.... if on the third cycle, the engine fires right up, there's your problem. Either the check valve in the pump has failed (which holds pressure on the rail for a while) or the pump itself is getting weak.
See what happens with that.
#3
05-17-2010, 05:10 PM
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Kj,
Im having the same issue, but try as heyyou said, if that doesn't cause it to fire right up, which in my case it still did the same thing, have the volume of fuel checked that's different then pressure. My volume indicated below .2 and it should be .5..
Im replacing my pump this weekend.
Im having the same issue, but try as heyyou said, if that doesn't cause it to fire right up, which in my case it still did the same thing, have the volume of fuel checked that's different then pressure. My volume indicated below .2 and it should be .5..
Im replacing my pump this weekend.
#4
05-17-2010, 07:06 PM
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#6
05-18-2010, 08:48 AM
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Fuel pressure when you first turn the key on. (but don't try and start.)
Try this: When you go out to your truck first thing in the morning, turn the key on, but, don't try and start it. Do you hear the fuel pump run? (you should....) If it does, cycle the key off, and then on, one more time, this serves to prime the fuel rail.... if on the third cycle, the engine fires right up, there's your problem. Either the check valve in the pump has failed (which holds pressure on the rail for a while) or the pump itself is getting weak.
See what happens with that.
Try this: When you go out to your truck first thing in the morning, turn the key on, but, don't try and start it. Do you hear the fuel pump run? (you should....) If it does, cycle the key off, and then on, one more time, this serves to prime the fuel rail.... if on the third cycle, the engine fires right up, there's your problem. Either the check valve in the pump has failed (which holds pressure on the rail for a while) or the pump itself is getting weak.
See what happens with that.
#7
05-18-2010, 09:14 AM
If there aren't any external leaks, it might be a leaking injector (leaking into the intake), or, a bad check valve on the pump. Possibly even a failing regulator. If you have a pressure gauge, screw it on there, cycle the key a few times to build pressure, and then pinch off the supply line, and see if pressure bleeds off. If it does, probably a leaky injector. (which would also give you hard starting.... to much gas in the intake)
I am going to guess bad check valve though, given that it fires right up on the third cycle.
I am going to guess bad check valve though, given that it fires right up on the third cycle.