Quote:
Originally Posted by kerthunk
As long as you have fuel pressure, the injectors should squeal when you lift the sensor plate. That pressure is produced by the fuel pump.
The click at the front of the car is probably the fuel pump replay. There is a safety cutoff switch attached to the sensor plate. If the plate is closed, then the fuel pump won't run. As soon as it is lifted, it triggers the relay to allow it run.
Do you hear the fuel pump running when you lift the sensor plate?
If you can't hear the fuel pump, there are a few things you can try:
* Plug in a "known good" fuel pump relay.
* Make sure you are getting 12v to the fuel pump relay. Best to test it at fuse #16.
* Make sure you are getting 12v at the fuel pump. Takes getting under the car...
* There is a plug at the back side (looking at the engine) of the mixture control unit, if you unplug it, then it will always allow the fuel pump to run. I would try disconnecting it, turning the ignition to on and listening for the fuel pump.
* The RPM limiter is also attached to the fuel pump relay. You can just unplug it to bypass.
If you CAN hear the fuel pump, then you will need to hook up the CIS gauges and figure out what kind of pressures you have.
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Good advice.
I suspect the fuel pump also. I agree that the click you hear is the fuel pump relay and the fact that you don't always get the injectors to squeal is because the pump is not running. Tweaking the plunger arm will have no effect on the fuel pump once the plunger is barely lifted and you hear the click--it either runs or it doesn't. I think your manipulation of the plunger and subsequent spraying of fuel was coincidental and had nothing to do with the fuel distributor.
My suggestion would be to completely check out the fuel pump first to insure it consistently runs when it's powered, and then follow up with pressure and volume readings.