Starting and staying running issues!!

[stormtrooper777]

Started this project with installing new lifters in the d.o.d cylinders (to get ahead of a collapsed lifter down the road) i put it all back together following all specs and torque processes. Go to start the vehicle and it ramps up like it wants to start then shuts off. If I do it two or three times it acts dead and loses power to start. Power comes back after a few minutes. I went through the motions and couldn't pin point the issue. I've replaced fuel pump, plugs coils, cam position sensor, crankshaft position sensor and a brand new battery. Even after all of that it won't start. Am I missing something??? M.a.p sensor? I'm so lost please help!!

 

[petethepug]

Welcome from SoCal. Sounds like you got the hard part done. Do you have something like a tech 2 to interact with the truck?

 

[rdezs]

Need more specifics on what you did. Were you looking to delete the AFM/DOD.... Or are you only replacing the AFM lifters?

Note.... It's not usually the AFM lifters that fail, it's usually the solenoids that control them. As much as I cringe at the thought of attempting to maintain the AFM system, to do it correctly you should replace the VLOM after removing it.

Reading whatever trouble codes exist is where to start.

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

You are already receiving clarifying questions from the knowledgeable folks on this Forum.

A quality bi-directional scanner would be very helpful to you in diagnosing the root cause of your issue.

@Doubeleive may the some thoughts on your issue.

 

[stormtrooper777]

No codes yet as it won't even run. I've given all the information I can. I've replaced many parts that probably didn't need it to be honest. Just seeing if anyone else has experienced this issue. I drove it in the garage so it did run before.

 

[Fless]

Go to start the vehicle and it ramps up like it wants to start then shuts off. If I do it two or three times it acts dead and loses power to start. Power comes back after a few minutes.

Help us understand what it does/doesn't do. From what was stated it cranks (turns over) initially but doesn't start. Then "it acts dead" -- does that mean it doesn't crank (turn over)? Or something else?

 

[wjburken]

No codes yet as it won't even run. I've given all the information I can. I've replaced many parts that probably didn't need it to be honest. Just seeing if anyone else has experienced this issue. I drove it in the garage so it did run before.

A full list of what was replaced would be helpful as that will help folks under what all could have been affected.

I am assuming you have checked all of your harness connections, fuel line connections, etc.

 

[Fless]

Tell us what you're working on -- year, make, model, and engine. Then start with some basic tests, like fuel pressure, spark, etc.

 

[stormtrooper777]

Help us understand what it does/doesn't do. From what was stated it cranks (turns over) initially but doesn't start. Then "it acts dead" -- does that mean it doesn't crank (turn over)? Or something else?

It turns over and acts like it's gonna start then immediately turns off. Example: start normally and it ramps up to 3-4k and comes down right away and turns off. Or it'll studder for 1 sec and shut off. The act dead part is after I try and crank a couple times it seems like not enough power to crank. Wait 2 mins and itll crank but not start. Ive replaced most every sensors minus map sensor. Is this gonna be the issue? I'm leaning towards that.

 

[stormtrooper777]

A full list of what was replaced would be helpful as that will help folks under what all could have been affected.

I am assuming you have checked all of your harness connections, fuel line connections, etc.

The list of parts is listed.