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!!
Check for power win module to RFH inherent one of those is not communicating with other modules normally win goes bad
I do have communication with vehicle. The problem I have is the engine does not start because the intake valves are not opening
Maybe there’s an initialization procedure involved for the unit you replaced.ask the dealer
I found this little footnote in repair instructions. Hope it helps.
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?
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
Are you talking about the spring compressor tool or am i missing something?
I have had this same problem when the engine was low on oil. Does it have any oil in it??
They can be a bear to get oil in the multiair solenoids . You said you removed the valve and intake valves were not opening ??
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?
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…
Would you mind sharing the bleed procedure? Where or how can I access OEM service information?
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
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…