A few engine errors

[AwesomeRob]

Hi,

I recently purchased an RCZ Asphalt.

I can only assume that who did the service at the dealer before I bought the car didn't tighten up the Turbo Pipe and screw in sump plug tight enough because it empties oil all over the drive. I had a new sump, oil and tighten of the turbo pipe. There's a post on here with details about that.

A day later got an EM light, lumpy idle, no acceleration so decided to buy a good diagnostic device.

It came back with these codes:

P1336 - State: Intermittent - Misfire on Undetermined Cylinders
P1338 - State: Intermittent - Misfire On Cylinder 2
P0012 - State: Permanent - Inlet Camshaft Dephasing Coherence
P2263 - State: Intermittent - TurbOpen Circuitharging Pressure Regulation Fault Measured Pressure Too High

I've done some research and it could literally be anything:

HPFP
Coil Pack
Oil Sensor
Timing Chain
EGR
etc

From those that know a lot about these cars what do people thing the most likely cause is?

I can also get live data graphs if needed.

 

[Pedro]

P1336 Crank/Cam sensor range performance poss failing in one or other both correlate together to send data to ECU to regulate engine timing
P1338 Possibly Camshaft sensor Bank1 Misfire
P0012 "A" Camshaft position sensor Timing over retarded Bank1
P2263 Turbocharge/ supercharge Boost system performance maybe related to timing issues?

 

[Logikmaster]

I would swap coil packs from cylinder 2 to cylinder 4 and see if the fault moves. If it does there’s the issue as firing issues directly impact on timing and phasing of both fuel injection and boost.

 

[Pedro]

If one coil pack is defective change all four together (recommended) as with the plugs also never mix n match otherwise its just prolonging running issues with intermittent failures

 

[AwesomeRob]

Thanks for the suggestion, I'll give the coil pack move a go.

On these engines is cylinder 1 closest to the timing chain so it goes 4,3,2,1 when looking down at it?

 

[Logikmaster]

Thanks for the suggestion, I'll give the coil pack move a go.

On these engines is cylinder 1 closest to the timing chain so it goes 4,3,2,1 when looking down at it?

Yes and no . Yes cylinder 1 is closest to the timing chain, which is on the left of the engine bay when you look at it, so therefore read from left to right in your numbering and all will be well - 1,2,3,4. Let us know how you get on.

 

[AwesomeRob]

I moved the coil packs and cleared the errors. Took it for a drive and the EM light stayed off. I can feel there's still an issue as it has hesitation when the turbo engages so this will be fun trying to figure out the cause.

From live data off of the diagnostic unit does anyone know or is there any documentation stating what the readings should be for things like pressure, o2 etc.

 

[wilsofar]

As documented in various sections,when a multitude of problems / codes occurs the usual suspect is the HPFP.I spent a fortune on so called solutions until I replaced the HPFP which magically cured all ills!

 

[AwesomeRob]

I called local Peugeot dealer yesterday who quoted £750 inc VAT as I had a suspicion it could be that.

While Googling prices I found someone who repairs them on Ebay as they state it is a repairable unit and not worth spending the money for a new one. I wonder if this is true.

 

[Pedro]

I called local Peugeot dealer yesterday who quoted £750 inc VAT as I had a suspicion it could be that.

While Googling prices I found someone who repairs them on Ebay as they state it is a repairable unit and not worth spending the money for a new one. I wonder if this is true.

Yea the guy recons the whole unit unit its cheaper than splashing out on a hefty Stealer price & they are relatively easy to take off if your handy with a spanner its not rocket science just leave the cars fuel system to depressurize itself for an hour or so if your going to do it yourself

 

[wilsofar]

A couple of years ago I paid £339 for HPFP from Neo Bros (Saab and Mini specialists) and I think £100 for fitting at local garage.

 

[AwesomeRob]

Hi All,

There's been an update.

So I took my car into a garage and they ran a compression test. They said Cylinders 2 and 3 were at 80% compression. The others were fine.

They quoted £600 to strip down the engine to find the cause. Is this worth it or is there a better option on a gamble to replace parts?

 

[RCZIain]

Low compression could be carbon build up. The carbon can prevent the piston rings from sealing correctly.

 

[Pedro]

Ask them for the of price of walnut blasting to clean out the Valves they become clogged up with carbon & eventually they don't seal properly hence you can get compression problems plus numerous running issues

 

[AwesomeRob]

Out of interest what would happen to the engine if it is carbon build-up and not cleaned?

 

[AwesomeRob]

These are the cylinder readings:
Cylinder 1: 135psi
Cylinder 2: 70psi
Cylinder 3: 90psi
Cylinder 4: 145psi

They also did a cylinder leakage test:
Cylinder 1: 47%
Cylinder 2: 85%
Cylinder 3: 75%
Cylinder 4: 46%

From the above tests they said there is an internal cylinder leakage.

 

[AwesomeRob]

Does it matter that spark plugs 1 and 4 have Bosch but spark plugs 2 and 3 have NGK.

 

[Pedro]

They recommend only use the same brand of plugs & coil packs

Out of interest what would happen to the engine if it is carbon build-up and not cleaned?

Carbon Build up can affect overall performance relating engine combustion fuel usage & oil even unburnt fuel can bypass valve seals causing catalytic issues etc
The use of odd plugs may appear not to cause any issues but could lead eventually to firing problems relating to overheating of electrode due to the age of mixed plugs same with coil packs reasons are if one component fails then more may follow later unless the service history says otherwise as regards to their lifespan

 

[AwesomeRob]

I changed all 4 spark plugs with new NGK's and the problem has gone away.

Can someone explain how it is no longer juddering on hard acceleration just my changing the spark plugs when I presume the Cylinder PSI levels are still low if I did another compression test?

 

[Pedro]

Plugs have different manufacturers performance parameters some will be suited to higher temperatures some will not & in HPT Engines the heat generated through combustion is critical to the rating of the plugs performance data this is why they say never mix the plugs or coil packs regarding the new plugs fitted with the problem disappearing you now have all 4 cylinders combusting at the correct firing sequence so this may account why there is no judder when your accelerating
Compression testing is relative to the condition of valves valve seats & piston rings a normally healthy Engine will register 100psi with no more than 10% variation between high & low readings some symptoms can include worn piston rings bad valve seats/ seals or even a weeping head gasket if a cylinder has low compression a wet test is sometimes used to determine any of the above 3 suspected issues