Thread: Fuel Pump Relay Project - We can rebuild him
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Old May 17, 2013 | 09:18 PM
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onehundred80
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From: Ontario
Default Re: Fuel Pump Relay Project - We can rebuild him
Originally Posted by Parallel Ice
THANK YOU! You have shed a LOT of light on this. Reading through what you have shown, there seems to be quite a few opportunities here for improvement, most of which are outlined really well on here.

This thread may be entirely useless, but I will update as I modify (re-solder, shield, horny, anything else).

Thank again and cheers!
The three points that require to be re-soldered a lot of the time are the cause of the car not starting, as the starter does not work when the key is turned. The reason being that two of the three soldered connections go to the engine control relay, I'm not sure where the other one goes.

The problem with these three connections is cold solder joints, not heat or vibration. The soldering is done by wave soldering according to a post on another forum, why these three points have a solder problem is unknown, other joints have been found faulty though.

The air pump relay gets the contacts burned and this causes the pump to, rarely, run all of the time as the points get welded together or not at all. This is not connected to the three solder point problem but rather I think poor grounding or problems in the pump that causes the points to flutter open and shut when they should be shut firmly during pump operation.
 
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