Difference between revisions of "Petrol engines intermittent 2.1"
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==General== | |||
'''Beaker''' | '''Beaker''' | ||
check that you have 12v on pin 30 in the distribution box left side front of engine as this supplies the fuel and ecu relays, then check the outputs from both the relays, if the ecu doesn't get it's ignition switched 12v it won't start. | check that you have 12v on pin 30 in the distribution box left side front of engine as this supplies the fuel and ecu relays, then check the outputs from both the relays, if the ecu doesn't get it's ignition switched 12v it won't start. | ||
Check spark at plugs | Check spark at plugs | ||
Check connections on temp2 sender and afm | Check connections on temp2 sender and afm | ||
Check connector to ECU (maybe the wind and damp got to it) | Check connector to ECU (maybe the wind and damp got to it) | ||
Check that air inlet not blocked somewhere (eg birds nest material in cyclone) | Check that air inlet not blocked somewhere (eg birds nest material in cyclone) | ||
Check trigger signals to injectors | Check trigger signals to injectors | ||
Check fuel pump running | Check fuel pump running | ||
Check connections hall sender and isv and idle control unit - try taking the idle out of the system too - a faulty control unit may affect the start up, the ecu is told it's starting by the ignition switch and throttle switch and adjusts accordingly | Check connections hall sender and isv and idle control unit - try taking the idle out of the system too - a faulty control unit may affect the start up, the ecu is told it's starting by the ignition switch and throttle switch and adjusts accordingly | ||
=='Vanagon' syndrome == | |||
Vanagon syncdrome can take a variety of forms, but originally intended to cover cases of injected US origin MVs misfiring after a considerable mielage from start of journey right up to stopping. Symptons usually disapear after stopping for a while. But do not assume that the fix is always the std. vanagon syncdrome fix which only works in some cases. | |||
There was an identified cause covered in the following links, AFM potentiometer flap tracks, AFM trigger signal instability etc. However, on both DJs and MVs electrics/electronics can become flaky after 15 ~20 years from new. Check and remake good engine and engine bay earths, connectors, and on MVs alwasy think 'Lambda sensor' (O2 sensor failure) or its wiring. | |||
[http://www.benplace.com/vanagon_intermittent_syndrome.htm| vanagon syndrome] | |||
[http://www.benplace.com/capacitors.htm| capacitors for above fix] | |||
== Non-Vangon syncdrome vanagon Syndrome == | |||
As per vanagon syncdrome but not cured by the normal vanagon syndrome fixes... | |||
On both DJs and MVs electrics/electronics can become flaky after 15 ~20 years from new. Check and remake good engine and engine bay earths, connectors, and on MVs alwasy think 'Lambda sensor' (O2 sensor failure) or its wiring. | |||
== Bad starting/flooding/rough running until hot === | |||
Usually the T2 temp sender or its wiring under the thermostat. Sometimes the ISU (idel stabiliser unit), or the IS control unit on the bulkhead or behind the o/s tail-light | |||
Revision as of 23:52, 28 October 2007
General
Beaker
check that you have 12v on pin 30 in the distribution box left side front of engine as this supplies the fuel and ecu relays, then check the outputs from both the relays, if the ecu doesn't get it's ignition switched 12v it won't start.
Check spark at plugs
Check connections on temp2 sender and afm
Check connector to ECU (maybe the wind and damp got to it)
Check that air inlet not blocked somewhere (eg birds nest material in cyclone)
Check trigger signals to injectors
Check fuel pump running
Check connections hall sender and isv and idle control unit - try taking the idle out of the system too - a faulty control unit may affect the start up, the ecu is told it's starting by the ignition switch and throttle switch and adjusts accordingly
'Vanagon' syndrome
Vanagon syncdrome can take a variety of forms, but originally intended to cover cases of injected US origin MVs misfiring after a considerable mielage from start of journey right up to stopping. Symptons usually disapear after stopping for a while. But do not assume that the fix is always the std. vanagon syncdrome fix which only works in some cases.
There was an identified cause covered in the following links, AFM potentiometer flap tracks, AFM trigger signal instability etc. However, on both DJs and MVs electrics/electronics can become flaky after 15 ~20 years from new. Check and remake good engine and engine bay earths, connectors, and on MVs alwasy think 'Lambda sensor' (O2 sensor failure) or its wiring.
Non-Vangon syncdrome vanagon Syndrome
As per vanagon syncdrome but not cured by the normal vanagon syndrome fixes...
On both DJs and MVs electrics/electronics can become flaky after 15 ~20 years from new. Check and remake good engine and engine bay earths, connectors, and on MVs alwasy think 'Lambda sensor' (O2 sensor failure) or its wiring.
Bad starting/flooding/rough running until hot =
Usually the T2 temp sender or its wiring under the thermostat. Sometimes the ISU (idel stabiliser unit), or the IS control unit on the bulkhead or behind the o/s tail-light
