How to disable fuel pump for compression test?

[richyg]

Im sure its probably simple, but cant find it in the bible. does it run through its own fuse? Also should i disconnect the coil?

[GreenV8S]

It runs through several fuses and a relay, if you just pull the two metal cased relays on flying leads by the ECU that will take care of the fuel, alternatively pull the wire off the pump, or there's a join in the ignition sense wire to the ECU which is convenient to access by the throttle body, or disconnect the ignition lead from the coil, or pull the leads off the injectors, or ...

[richyg]

Thanx greenv8s

just a few ways then! hehe. ok think i will go for the disconnecting the lead on the pump itself method. Great, can do my commpression test 2morrow! maybe shed some light on my missfire. will disconnect coil too just to be sure.

[spend]

The fuel relay is the one with the blue holder IIRC.

Dave