2019 Ranger 2.3 ecoboost no start, low compression

[ctartm]

I have a 2019 Ranger that won't start. It has low compression, 75-80 psi on each cylinder. I believe the timing chain jumped. I just ordered the tools to set timing on this stupid set up. No marks is stupid. It's a bear to just check timing. It ran, I parked it and the next morning it wouldn't start. Anyone have any ideas before I rip it all apart?

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[RangerBill]

Have you checked for any DTCs?

 

[My12SecRanger]

if the vct solenoid is bad it will cause low compression and should show miss fire data, I have seen 2 mustangs with similar issues

 

[ctartm]

No DTC's. Is there a test for the VTC solenoids?

 

[airline tech]

A start would be to check (KOEO) Key on engine off and look at the Live Data PID's for the VCT System and note if any position is indicating anything other than (0) plus note is the VCT System (Enabled or Disabled) with (KOEO) it should be disabled.
Plus, while cranking check PID's for the Crank & Cam sensor pulse signals we need to know if the Crank / Cam sensors are actually seeing engine rotation. Moreso the Cam Sensor

 

[RangerBill]

If you have Forscan or an equivalent program, see what your FLP (Fuel Low Side Pressure) and FRP (Fuel Rail Pressure) readings are. Also, check for spark at one of the spark plugs.

I would check these before tearing into the engine.

 

[RangerBill]

In order to do a compression test on a direct injection engine, the fuel injectors have to be disabled as well as the throttle held fully open. I believe that holding the throttle pedal to the floor while cranking during the test, will accomplish both requirements. Holding the pedal to the floor disables the fuel injectors to clear a flooded engine (as far as I know).

 

[carnut122]

I have a 2019 Ranger that won't start. It has low compression, 75-80 psi on each cylinder. I believe the timing chain jumped. I just ordered the tools to set timing on this stupid set up. No marks is stupid. It's a bear to just check timing. It ran, I parked it and the next morning it wouldn't start. Anyone have any ideas before I rip it all apart?

 

[seasprite]

Crank the engine while in clear flood mode. How does the cranking sound? da-da-da-da or da-da-da-daaa?

 

[ctartm]

Ok, did some checking and the VCT system said disabled, while cranking it looks like both sensors are showing it's cranking over. The low pressure fuel pump says it not working, which I found when you turn the key, testing at the fuel pump control module gets power but the wire that goes to the fuel pump flashes very quickly and goes out. I did run power and ground to the fuel pump and can hear it running, but still didn't start. Checked the compression in 1 cylinder with throttle to the floor and still reading 80psi

 

[ctartm]

Also just put air into each cylinder and air is bypassing through the exhaust. If the vvt solenoid bad it opens valves? And is it usually exhaust valve?

 

[ctartm]

I forgot to mention, I did a full code scan. P025A is in there. Going to do some tests I found

 

[Retirednavy2010]

I forgot to mention, I did a full code scan. P025A is in there. Going to do some tests I found

Holy crap, I'm glad I grew up with old V8's, points and setting the dwell. All this moogly googly about VTC'S, FLP'S, FRP'S, TDC'S makes me dizzy. I just know I bought the extended warranty and for a hundred bucks Ford can fix it. ?

 

[airline tech]

That code may be self-induced by you having the FP Module disconnected.

But - Check fuse 8 in the BJB (Engine Bay)

Question - When you open the driver's door are you getting the - Waste Gate Actuator (Whine) movement?
The PCM Wake circuit - Powers that and also the (In-Tank) LP Fuel Pump Prime, the prime is only for a few seconds.

Since I have never dealt with the VCT system, trying to determine how the VCT is operated at engine start and why would the (Exhaust) valves hold open during a crank event.
Manuals are no help with this scenario -so this may take some deep digging.
But the important thing is - We need to know if the Wake Circuit is triggering (ON)

 

[airline tech]

I think I would try - disconnecting the (Exhaust) VCT Solenoid, and attempt to start the truck, to see if that helps.
As unless the solenoid is stuck, it should allow the exhaust valves to (relax) closed except for the cam lobe operation and take electrical control of it away

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