knobby1 wrote:Have you checked the CHT wiring connector and loom all the way back to the PCM...?? They can break in the sheathing and cause issues....a continuity test will verify if it's ok.
Lord Knobrot
Cretosx wrote:knobby1 wrote:Have you checked the CHT wiring connector and loom all the way back to the PCM...?? They can break in the sheathing and cause issues....a continuity test will verify if it's ok.
Lord Knobrot
Hi sorry my thread didn’t come up, had no intention of spamming! Did look to remove them, the cht wiring looks fine is receiving voltage too, it’s weird that it’s pinned with absolutely no battery connected and no ignition but it doesn’t seem stuck, the engine will not turn over at all unless the fans are on max it won’t start though regardless, cheers for the suggestion.
knobby1 wrote:Cretosx wrote:knobby1 wrote:Have you checked the CHT wiring connector and loom all the way back to the PCM...?? They can break in the sheathing and cause issues....a continuity test will verify if it's ok.
Lord Knobrot
Hi sorry my thread didn’t come up, had no intention of spamming! Did look to remove them, the cht wiring looks fine is receiving voltage too, it’s weird that it’s pinned with absolutely no battery connected and no ignition but it doesn’t seem stuck, the engine will not turn over at all unless the fans are on max it won’t start though regardless, cheers for the suggestion.
Possibly a faulty gauge then.. or the clocks PCB not happy.??
Lord Knobrot
Cretosx wrote:Could a faulty gauge stop it starting though? It’s really odd.
knobby1 wrote:Cretosx wrote:Could a faulty gauge stop it starting though? It’s really odd.
Just thinking out loud here and I'm probably talking out my ar$e...but.....If the PCM "thinks" the CHT is too high, it won't let the engine start. You've replaced the CHT sensor, so I'm guessing there may be a short somewhere in the wiring/gauge for this to be the case. If as you say, the gauge is stuck on high even with or without power to the clocks, I suspect there's possibly something wrong with the gauge. Once powered up, the gauge then tells the PCM the cyl head temp is too high....which = no start.
Lord Knobrot
Frag wrote:I’ve had this fault with engine wiring loom rubbed through,check the area along front of timing cover where the loom should run in the plastic channel held on by 3 torx bolts.
There was a recall for the loom chafing,on the long bolt that holds the thermostat housing.
Fault I had,would cause van to cut out for a split second,usually before you had time to see the temp gauge ‘react’
Once I noticed that,fixing it was straight forward.
eldertaco wrote:That sounds like much too high voltage, I would have expected something around 3.5v. This old post from wojciech might shed some light on it for you?
viewtopic.php?f=2&t=187190#p1602992
Cretosx wrote:eldertaco wrote:That sounds like much too high voltage, I would have expected something around 3.5v. This old post from wojciech might shed some light on it for you?
viewtopic.php?f=2&t=187190#p1602992
What would cause something like this though?
Frag wrote:Have you checked the continuity of the wiring from the CHT to the PCM ?
Cretosx wrote:So I think the fault lies with the PCM, the temp gauge isn’t stuck because I’ve taken it all out and it shoots straight up to 132C which is “fault to circuit” with the CHT I’ve checked all obvious wires, I’ve managed to start it with starter fluid but it will only turn over with the fans on, I don’t know if there is a fuse or relay that could cause this fault?
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