Volvo P1800 ES problems

Hi John,

sorry to say. But this is a typical US "mending". Drilling through the end stop screw and possibly destroying inner tuning screws is one of the worst ideas that one can have. You were lucky that inner adjustment screw was still okay. Otherwise I could not have helped as it is one of the view pieces I do not have as spare. But it was still bad enough. The potting blocks the thread of the end stop screw. So it is extremely difficult to remove it. You have to clean thread well before you do so. And then you need a good screw driver fitting into the slot of the end stop screw. Imagine what happens if the slot is gone due to someone drilling a hole into it and afterwards destroying the thread by brute force. Right: That is when the shit hits the fan!

To all those who want to repair a MAP sensor with a broken diaphragm: DO NOT DRILL INTO SLOTTED SCREW OR TRY TO REMOVE IT: Desctruction is what you are going to achieve.



I have rebuilt your thread, replaced the end stop screw with a new one and also replaced the broken rubber feet. They are important for damping the vibrations.

In your mail you seem to have confused secondary coil on MAP sensor with a secondary MAP sensor. There is no secondary MAP sensor, only primary and secondary coil on it.