Dead Cylinders - Revision history

Geoff: /* The fuel injector electrics are common between cylinders - 1&3 and 2&4 */

2019-08-10T19:47:48Z

‎The fuel injector electrics are common between cylinders - 1&3 and 2&4

Geoff: Dead Cylindes moved to Dead Cylinders

2009-10-24T14:25:37Z

Dead Cylindes moved to Dead Cylinders

Geoff at 20:28, 8 October 2009

2009-10-08T20:28:19Z

DeanG: Diagnosing a common problems between pairs of cylinders: 1&3, 1&4, 2&3 and 2&4

2009-02-15T01:30:44Z

Diagnosing a common problems between pairs of cylinders: 1&3, 1&4, 2&3 and 2&4

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== '''Dead Cylinders''' ==

It is not uncommon to have pairs of cylinders not producing power. Once you have determined which pair of cylinders is having the problem the diagnosis becomes much easier. For a turbo car the:

== The ignition coils are common between cylinders - 1&4 and 2&3 ==

Diagnosis of the ignition system can be done by switching around the plug wires to see if the problem moves with the wires. If so it is a problem with the wires. Although having two bad wires is uncommon it is not unheard of. The next step is swapping the coil packs to see if the problem moves. If so it is a problem with a coil pack. If neither of the tests moves the problem it can be the coil pack base. This is a much more expensive part.

== The fuel injector electrics are common between cylinders - 1&3 and 2&4 ==

Dirty contacts in the connector IHC - B5 can be the problem. Also check the resistance of each injector. They should all be the same. One bad injector can cause the injector circuit in the ECU to fail (overheat) shutting down both injectors on the circuit.

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	== The fuel injector electrics are common between cylinders - 1&3 and 2&4 ==		== The fuel injector electrics are common between cylinders - 1&3 and 2&4 ==

−	Dirty contacts in the connector IHC - B5 can be the problem. Also check the resistance of each injector. They should all be the same. One bad injector can cause the injector circuit in the ECU to fail (overheat) shutting down both injectors on the circuit.	+	Dirty contacts in the connector IHC - B5 can be the problem. Also check the resistance of each injector (1.8 to 2.2 ohms but remember to subtract the resistance of the measuring leads). They should all be the same. One bad injector can cause the injector circuit in the ECU to fail (overheat) shutting down both injectors on the circuit. There will be noticeable improvement if the electrical connector of a bad injector is removed whereas removing the connection from a good injector paired with a bad injector will probably make no difference.
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		+	There is a theory that an apparent electrical failure is due to a mechanical failure: If an injector sticks then the solenoid core may saturate earlier than normal thereby giving a lower impedance which the ECU cannot drive. This theory is based on the dc resistance of a bad injector being no different to a good injector, but has yet to be verified by trying to un-stick the pintle.

← Older revision		Revision as of 20:28, 8 October 2009
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		+	'''REMEMBER:'''
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		+	'''When loosing power comes as a pair,'''
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		+	'''There is something to be aware:'''
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		+	'''If the sum adds up to five,'''
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		+	'''Sparky bits may not be live.'''
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		+	'''If the loss is even or odd,'''
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		+	'''Loss of fuel may be the sod.'''
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		+
	== '''Dead Cylinders''' ==		== '''Dead Cylinders''' ==

← Older revision	Revision as of 14:25, 24 October 2009
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