Hesitating to start
Administrator
Joined: Apr 2010
Posts: 87,394
Likes: 4,213
From: Clayton MI
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.
Professional
Joined: Jan 2009
Posts: 134
Likes: 0
From: Delaware
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.
Thread Starter
|
Professional
Joined: May 2008
Posts: 146
Likes: 0
From: Albany, GA
How do I do this? Is it something I can do or should I take it to a shop?
Thread Starter
|
Professional
Joined: May 2008
Posts: 146
Likes: 0
From: Albany, GA
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.
Administrator
Joined: Apr 2010
Posts: 87,394
Likes: 4,213
From: Clayton MI
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.
