Originally Posted by
plynchy
Thanks for taking the time to have a read Stu, much appreciated, will have a good play with it this weekend (pending the exhaust being repaired).
Ordered a new pump and a set of 071C's from you yesterday (for £11 it's worth a shot), promptly arrived this morning, spot on. I've factored in changing the pump anyway as it's 20 years old so it must be getting tired by now!
The pump voltage readings barely altered from idle to 5k+ RPM (thats driving it, not stationary).
Thanks for your business.
Please note that the pump voltage readings wont change at all unless the engine is developing boost with WOT and actually under load.
This is because as the boost increases so does the fuel pressure which increases the pumps current draw substantially. Also, under these conditions the injector circuit is working harder which is on the same fuse box spur. This drops the voltage even further.