RPM reading on Pscan
remove spark plugs to make the crank easy to turn and remove cam cover to observe cam shaft position,
start to rotate engine by hand, you need to get the crank pulley to the 16 deg BTDC mark with both valves closed on # 1 cylinder, the piston should be close to the top of it’s stroke.
Using a dial gauge, set on the top of # 1 piston ( through the spark plug hole ) and get your glamorous assistant to slowly continue to rotate the crankshaft towards the 0 deg TDC mark,
The dial gauge should continue to show the piston rising as the pulley approaches 0 deg TDC,
Once at 0 deg TDC observe that the gauge indicates the piston is at the top of it’s stroke by continuing to rotate the crankshaft past 0 deg TDC the dial gauge should indicate the piston descending once past 0 deg TDC
If this isn’t what happens then you have a serious timing problem probably caused by the harmonic balancer also sometimes known as harmonic damper or damper pulley ( the rubber bonding between the outside of the crank pulley to the inside failing allowing the outer of the pulley to rotate from the centre) this will throw all your timing out to the shithouse.
It is however an easy fix just replace the crankshaft pulley.
Rimmers part# LGH000010 there will others available from alternative suppliers.
If you can’t get access to a dial gauge there is a crude imprecise method of checking TDC, take a plastic chopstick and use that instead of a dial gauge. You can watch it rise as the crankshaft approaches 0 deg TDC, and descend once past, you won’t be able to determine exact TDC but seeing how far off TDC seems to be on your engine ( going by your pix) it should do.
"Keep calm, relax, focus on the problem & PULL THE BLOODY TRIGGER"
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"Keep calm, relax, focus on the problem & PULL THE BLOODY TRIGGER"
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"Keep calm, relax, focus on the problem & PULL THE BLOODY TRIGGER"
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I find when doing diagnostics, I work instinctively, other without much conscious thought, so I have difficulty putting it into words and than they still get lost in translation from Australian English to English English
If the car was sitting here in front of me I’d probably find the problem pretty quickly, alas I’m in Melbourne and your car is in Oslo.
I need to think about something else for a bit, and see if it comes to me.
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Feeding a separate 12V power supply to the fuse that feeds pin 16 of the OBD port is an excellent idea. To anyone that wants to try this, just make sure that the earth of your supply is attached to the earth of the vehicle well.
Lithium battery boosters and Milwaukee M12 batteries (you can buy an adapter on eBay that converts to a barrel socket) are excellent sources of 12V power that I've used.
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If that was charged from the OBD supply via a diode you would be guaranteed to have a strong & stable supply at any state of the car battery.
And that could be hidden under the instrument cowl with my other electronic addendum. (See other recent posts for clarity).
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The only thing is I think that you have to regulate the input to the board to 12.5V or something and I haven't figured out how to do that.
You probably don't want 14V straight from the alternator into the balance circuit.
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