Fuel pump Kill switch

[xrunner123]

I need to cutoff the fuel pump for anti-theft. It's hotwired.
Where do I break it? Can someone pmail me please and point me in the right direction.

Thanks

 

[salvageV6]

It might be easier to interrupt the crank sensor at the ECM. Use 16 gauge wiring to and from the ECM wiring at that connector and a nice quality 4 pole miniature switch using all 4 poles.

Or else interrupt the feed to the fuel pump relay, but if you are still using the factory oil pressure switch the fuel pump will run once the car is cranked to build up over 4 psi. pressure so a thief could still start it if he cranked it long enough.

I used the crank sensor interrupt on my car with no issues, hard to detect and not easy to bypass even if a thief brings his own ECM it still won't start.

 

[xrunner123]

Thanks. Maybe I'll do that.
Do you where to get the ECM pinouts? I can only find the ECM in Section 6E which is the Emissions section, but they don't specify pinouts.

http://gnttype.org/techarea/images/wiring_images/ecm_turbo.jpg
is it but it's hard to read.
Thanks

 

[salvageV6]

I use page 6E3-A4-8 for the pinout.

6E3-A4-15 to 6E3-A4-18 for diagrams and info.

Factory service manual is MUCH easier to read than that diagram.

You might try to search the site votex buicks for more diagrams as well.

Or buy the CD ROM or hardcopy, well worth the money.

The fuel pump relay drive is pin A1 a green/wht. stripe wire.

 

[jhanson1750]

I wired in a toggle switch into the fuse panel on the fuse marke fuel inj I think that was the label. Anyway works like a charm!