Blowing fuel pump fuses on your S-4? Check this out!
08-31-2006, 11:56 PM
#31
Rennlist Member
Here's the link to the US distributor:
http://www.saelig.com/miva/merchant....tegory_Code=PS
Here's the Picotech link:
http://www.picotech.com/single-chann...illoscope.html
I got the ADC40, the cheapest they have. It is a single channel scope based on a parallel port dongle.
http://www.saelig.com/miva/merchant....tegory_Code=PS
Here's the Picotech link:
http://www.picotech.com/single-chann...illoscope.html
I got the ADC40, the cheapest they have. It is a single channel scope based on a parallel port dongle.
09-01-2006, 02:24 AM
#32
Rennlist Member
Nice... that's a very handy tool. Thanks for the links. I've been wanting a scope for a long time since my aged Tek unit was heisted... Something like this would tide me over till I get what I really want.
09-04-2006, 05:40 PM
#33
Rennlist Member
Enjoy. I haven't gotten a chance to start really digging into troublshooting here. I have a feeling I've got a lot of tracing and studying to do. I suspect somewhere inthe pod the fuel gauge and the tach share a ground... somewhere.
08-01-2011, 07:19 PM
#34
Rennlist Member
mega old thread update.
I had a standard relay plugged into the kick-down slot. On a 5 speed car that's a big no-no, it shorts the CPS signal to ground and nothing works. I pulled that relay and plugged W11 back in. I've got a tach now and I'm a happy camper.
Time for some track events.
I had a standard relay plugged into the kick-down slot. On a 5 speed car that's a big no-no, it shorts the CPS signal to ground and nothing works. I pulled that relay and plugged W11 back in. I've got a tach now and I'm a happy camper.
Time for some track events.
08-01-2011, 08:29 PM
#36
Rennlist Member
With wrong relay in kickdown position: no start, no tach
Wrong relay and W11 unplugged; starts and runs, no tach
No relay and W11 plugged in; runs With tach
Wrong relay and W11 unplugged; starts and runs, no tach
No relay and W11 plugged in; runs With tach
08-01-2011, 08:57 PM
#37
Three Wheelin'
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Are you blowing fuel pump fuses on your S-4 and don't know why? Try this.....unplug your O2 sensor and then start it up! That's right....the O2 sensor is tied in with the fuel pump fuse! And if your O2 sensor insulation is as nasty and crumbly as mine, it will short and blow the fuel pump fuse when you turn the key. Hope this saves some 
one hours of troubleshooting and fuel pump changing!
one hours of troubleshooting and fuel pump changing! Interesting. A few days ago a guy was telling me about how his Neon was blowing fuel pump fuses. Some dude he knew had a look at his lambda sensor and found the wires chafed and shorting to the chassis and blowing the fuse. I laughed saying "Only on an American car".
