No Start

Leon Owner/Technician Arkansas Posted   Latest  
Updated
Drivetrain
2018 Jeep Compass Latitude 2.4L (B ED6) 9-spd (948TE) — 3C4NJDAB6JT261745
P1062
Crank / No Start

Hello all,

have this Jeep in the shop that we replaced the Multi air Variable valve actuator assembly on. We put it together and cranked it over and didn't sound like it had compression at first then it fired a couple times then died nd now it doesn't have compression at all.. I removed the valve again and had an assistant crank it. The intake valves do not move at all when we crank the engine. Read 35-40 psi oil pressure on the scan data so I'm reasonably confident we have sufficient oil pressure to the assembly. 

Oil sprays out out of a pin hole (possibly a bleeder hole?) on the right side of the assembly and out of what looks like pressure relief holes in the top of the assembly..

I suspect air trapped inside the assembly.. is that possible? is there a certain bleed procedure I need to go through to blead this thing? I could not find any kind of bleeding procedure anywhere on Prodemand..

Thanks in advance for your time! And thank you for your help!!

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Interesting
Oscar Mechanic
California
Oscar
 

Check for power win module to RFH inherent one of those is not communicating with other modules normally win goes bad

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Leon Owner/Technician
Arkansas
Leon
 

I do have communication with vehicle. The problem I have is the engine does not start because the intake valves are not opening

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Louie Technician
New York
Louie
 

Maybe there’s an initialization procedure involved for the unit you replaced​.​ask the dealer

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Rolando Diagnostician
Texas
Rolando
 

I found this little footnote in repair instructions. Hope it helps.

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Helpful
Leon Owner/Technician
Arkansas
Leon
 

I noticed that too but I installed a new unit

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Rolando Diagnostician
Texas
Rolando
   

Does the new unit come prefilled with any oil? If not, like Ken stated, there is gonna be an excessively long crank time to prime the Multiair unit before the engine will start. Another question. Is fault P1062 what you are getting currently or what you had prior to replacing the Multiair unit?

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Leon Owner/Technician
Arkansas
Leon
 

Prior to replacing the multiair unit

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Ken Owner/Technician
Arizona
Ken
 

There is a long crank time to refill with oil…also a special tool is required to set up the multi air.. Especially if you are reusing the an old unit…with out using the special tool there is a possibility of bending valves in the head

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Leon Owner/Technician
Arkansas
Leon
 

Are you talking about the spring compressor tool or am i missing something?

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Rolando Diagnostician
Texas
Rolando
 

Im guessing Ken is referring to these tools

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Thanks
Caleb Diagnostician
Indiana
Caleb
 

I have had this same problem when the engine was low on oil. Does it have any oil in it??

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Leon Owner/Technician
Arkansas
Leon
 

yes full of clean oil

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Justin Technician
California
Justin
 

They can be a bear to get oil in the multiair solenoids . You said you removed the valve and intake valves were not opening ??

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Leon Owner/Technician
Arkansas
Leon
 

That is correct.

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Chuck Owner/Technician
California
Chuck
 

These vehicles have a clear flood mode. When cranking engine with WOT the injectors will not fire. I usually Crank for 5-10 seconds about 10 times with WOT, allowing time in between cranks to allow the starter to cool. You will feel compression building around the fifth to seventh time. Usually will start by 10th crank. If not, are the solenoids receiving a command to open?

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Matthew Diagnostician
Kentucky
Matthew
 

i have seen these become a real problem if the bleed procedure is not followed exactly. I would suggest to look at oem service information due to the fact that if the unit does not start working soon it might no at all. I made the mistake early on with attempting to just install it and fire it over until i realized there is a small bleed check ball that is used to help aid in the purging the…

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Leon Owner/Technician
Arkansas
Leon
 

Would you mind sharing the bleed procedure? Where or how can I access OEM service information?

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Rolando Diagnostician
Texas
Rolando
 

I found this. It is for Multiair in an Alfa. Watch and try the way he does it. Seems like it starts effortlessly for him youtu​.​be/E7Tg5VEN7Xk

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Leon Owner/Technician
Arkansas
Leon Update
 

Good morning, I called Identifix yesterday afternoon and they told me that I should have solid power and ground at the solenoids while cranking the engine. I checked with a Pico scope and have some pulsing but not solid power and ground. So jumped power and ground to one solenoid and had an assistant crank the engine over and the intake valve opened on that cylinder. So, that confirms that i…

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