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![]() | Home > Technical > 2.2 wont start after new exhaust cam fitment |
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Walenut Member Since: 17 Jun 2012 Location: Midlands Posts: 118 ![]() ![]() ![]() |
Don't know the condition of the broken cam or how it broke but on past experience of a cam belt letting go I think I would have still checked the valves, 100 percent happy with compression & valve timing?
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dpcwright Member Since: 04 Feb 2011 Location: Cambridge Posts: 73 ![]() ![]() ![]() |
It could be that your oil temp is being measured in degrees Rankine as ice melts at 492 on the Rankine scale which also uses the Fahrenheit scale |
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The dog Member Since: 03 Oct 2016 Location: Aberdeenshire Posts: 62 ![]() ![]() |
I'm happy enough that the compression is good as the end of the exhaust cam broke at the hp/l[p fuel pump drive no broken belt or valve to piston clash occurred. I'm very confident that the engine has good compressions on all cylinders it's definitely down to having no fuel injection unfortunately I cant yet figure out why. |
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Walenut Member Since: 17 Jun 2012 Location: Midlands Posts: 118 ![]() ![]() ![]() |
Interesting thread Dog, keep us posted. |
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The dog Member Since: 03 Oct 2016 Location: Aberdeenshire Posts: 62 ![]() ![]() |
Question for all and Alex. On switching off does anyone know how long the HP fuel rail should hold pressure for or does it dump the pressure on switch off? Thanks in advance. The dog. |
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4642 ![]() |
There is no need to hold pressure for long as the HP fuel pump quickly rise the pressure on cranking.
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The dog Member Since: 03 Oct 2016 Location: Aberdeenshire Posts: 62 ![]() ![]() |
Thanks Alex. No "crash input" errors logged and the fuel rail does built quickly on cranking.
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Trav Member Since: 27 Aug 2016 Location: Aberdeen Posts: 167 ![]() ![]() ![]() |
Have you pulled a glow plug just to check if they are wet? Surely that gives you 100% clarity that they aren't opening.
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The dog Member Since: 03 Oct 2016 Location: Aberdeenshire Posts: 62 ![]() ![]() |
Hi Trav I've been working away again and have not had another go at the Freelander, cold dark evenings are also a bit off-putting I've recently hooked up an old oscilloscope with a current clamp to the injectors and couldn't detect a signal. I've newly bought myself a cheap Hantek 1008 scope which I'll have another go with. I'll also disconnect the oil temperature sensor and see if this makes any difference.
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Trav Member Since: 27 Aug 2016 Location: Aberdeen Posts: 167 ![]() ![]() ![]() |
It's not really getting beat as it is a fresh pair of eyes on the job. I also hate getting beat so this is what I say to get over it.
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The dog Member Since: 03 Oct 2016 Location: Aberdeenshire Posts: 62 ![]() ![]() |
First off. Trav thanks for your call much appreciated.
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Trav Member Since: 27 Aug 2016 Location: Aberdeen Posts: 167 ![]() ![]() ![]() |
How is the rest of the live data looking. IE oil and water temp? Check them at cold if they were reading really high readings at cold it would indicate a fault but I would say they would have to be significantly high before causing a non start issue.
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4642 ![]() |
The pulse width and the current needed for opening the injectors is very small.
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The dog Member Since: 03 Oct 2016 Location: Aberdeenshire Posts: 62 ![]() ![]() |
Alex Many thanks for the info I'll now have a go with the scope again without the amp clamp. I was a little worried I'd damage the scope looking directly for injector voltage rather than current.
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