Ford Transit cam vs crank wavform

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s4c
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Ford Transit cam vs crank wavform

Post by s4c »

Hi

I have a 2008 Ford Transit with a 2.4 H9FB engine.

The garage I perform diagnostics for replaced the engine from Ford and hasn't started since.

High pressure fuel pressure was low. I found some fuel leaks, which i repaired and fuel pressure now matches spec on IDS.

The vehicle will start with a sniff of easy start, and run rough. On an key start it will not go and there is no injection trigger.

I am looking for a known good trace for cam vs crank, I have downloaded one from the waveform library and it is out compared to mine. There is one on there which is close, but that is from a 2.2 engine.

I have included my trace to have a look at. [UPDATE. I keep getting a message that the forum has reached its upload quota, I will try again later]

Regards

Simon

Dcunning35
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Re: Ford Transit cam vs crank wavform

Post by Dcunning35 »

What's the frp with ,inj and imv disconnected after 5 sec crank?
Was the fuel system capped when disassembled?.
Danny

Dcunning35
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Re: Ford Transit cam vs crank wavform

Post by Dcunning35 »

If there is no pressure it will never inject ,it needs over 150bar to sync injection 200 to run.
Check ckp airgap
Too
Danny

s4c
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Re: Ford Transit cam vs crank wavform

Post by s4c »

Hi Danny

As far as I know the fuel system wasn't capped when engine was pulled.

On cranking frp matches desired

I will do the test you describe and report back

Simon

s4c
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Re: Ford Transit cam vs crank wavform

Post by s4c »

CKP air gap about 2 mm

s4c
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Re: Ford Transit cam vs crank wavform

Post by s4c »

Hi

Turned out to be a poor quality fuel filter. OE filter was a fix!

A known good waveform will be uploaded onto the database as soon as I can.

Attached is the known good.

Simon
Attachments
Ford_Transit_2008_H9FB_2.4_Diesel_Cam vs crank known good.psdata
(3.8 MiB) Downloaded 396 times

EAAD
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Re: Ford Transit cam vs crank wavform

Post by EAAD »

Hi Simon
Was the fuel filter starving fuel or allowing air in the system?
&
Did the ECU shut down the injector drivers etc......
Sorry for the 20 questions mate, I'm preparing for my courses and sponge like atm.

I've had something similar on a ford kuga which dragged air into the system (aftermarket, coopers fuel filter, customer supplied part) the o ring was a tad too thick causing the plastic filter housing to warp & ingress of air.
This was a no start when left overnight.

Dcunning35
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Re: Ford Transit cam vs crank wavform

Post by Dcunning35 »

Great news ,well done fella.
Danny

s4c
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Re: Ford Transit cam vs crank wavform

Post by s4c »

Hi EAAD

Sorry its taken so long to come back to you.

The filter was allowing air into the system and causing a low pressure in the fuel rail. The PCM wouldn't trigger the injectors because the fuel pressure hadn't reached the threshold required for starting.

I hope this helps

Simon

EAAD
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Re: Ford Transit cam vs crank wavform

Post by EAAD »

Nice one Simon, thank you for that.....

Thank you everyone, I am absolutely fascinated by everything about this subject.

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