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6th March 2024, 07:39 | #11 |
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Yes if you want to ensure your injectors are working as they should get them tested off the car. Also if you have access to a T4 you can check the compression - saves faffing around with connecting gauges up.
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6th March 2024, 09:12 | #12 | |
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Thanks Mike,yes via a T4, a balance test would potentially show up a cylinder with a problem, also comparing injector delivery quantities could also help, sadly I don't know anyone with a T4 locally. Yes, the best bet is to get all the 'new' injectors checked which I'll do as soon as I can. Cheers, Bill
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12th March 2024, 15:24 | #13 |
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You can't check compression on a T4. You can check injector compensation and cylinder balancing, but not compression. Just because the car isn't compensating on a cylinder doesn't mean that it is ok. It just means it isn't aware of an issue.
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12th March 2024, 20:53 | #14 | |
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It might not be as accurate as using a gauge but you can. The engine turns over with the injectors not firing and T4 checks how the crankshaft speed slows as each cylinder comes up on compression. |
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13th March 2024, 07:30 | #15 | |
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Just take the glow plugs out, do a test then fit new glow plugs (they will be knackered now anyway). Also make sure its a diesel compression tester as a petrol one won't read high enough. |
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13th March 2024, 09:05 | #16 |
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Can anyone tell me what injector compensation is? Haven't heard of it before.
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13th March 2024, 10:37 | #17 |
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Yes at idle speed T4 can determine the crankshaft acceleration after each power stroke, and then compensate by adjusting the amount of fuel from each injector to give a nice even engine idle.
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13th March 2024, 11:45 | #18 | |
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On the M47R which is what we are discussing here, head gasket failure is virtually unheard of. Stuck glowplugs aren't though. In a 20+ year old engine where they have never been touched before they can seize in place and break when you attempt to get them out and then you are in all sorts of bother. Each to their own, and if you don't rate the test then don't do it, but I'd recommend anyone with access to a T4 to try that first before touching the glowplugs if they suspect a compression fault, and of course they can check injector compensation, any stored faults etc at the same time. The path is System diagnostics: Engine Management: Real Time Display: Engine Roughness: Cylinder Balancing Status: and then with the engine stopped for compression test and running for idle speed variation. |
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1st April 2024, 14:31 | #19 |
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I have a the same symptoms. Cold start bad misfire. White smoke when you rev 1.5 - 2k. Some days are worse than others.
When warm it's OK. But you can feel a misfire when driving around 2k. I have replaced every thing. New injectors etc. I am fitting a new engine next week thats done 30k, my car is is 350k, Have a google for freelander 2k misfire. - no fix for it. |
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