5ktq CIS problems > 13.8v at battery, only 9v at pump...

[John Forbes]

Well actually I continued working on the car and my recent (5 min ago) discovery was that if I disconnected the pump it would read full battery voltage, or very close to it. I'm in the middle of changing the pump right now (actually I'm typing and eating, but you know what I mean!).


-Cody


---------- Original Message ----------------------------------
From: Brett Dikeman <brett at cloud9.net>
Date: Sat, 2 Aug 2003 21:58:34 -0400

>At 7:03 PM -0400 8/2/03, John Forbes wrote:
>
>>Ok voltage problem. Put a meter on the battery with car running and
>>I get about 13.8, not the best but not the end of the world, then
>>decided to put a meter on the pump and only got 9.2v WHILE THE CAR
>>IS RUNNING!
>>
>>Anybody have any idea what would cause a drop that bad in that circuit?
>
>Fuel pump relay would be my first guess.  They're known to go bad all
>the time, mostly from failed solder joints, I believe(they crack,
>arc, build up resistance, and finally just stop working entirely).
>You can pop them open pretty easily- have a peek in there, maybe
>re-solder some of the key connections(just adding a little NON ACID
>flux-core solder should be sufficient).
>
>Be careful gerfingergrabbin if the car was just running- especially
>during their final days, the FPRs can run very hot because of the
>high resistance.
>
>Let us know what you find!
>
>B
>--
>----
>"They that give up essential liberty to obtain temporary
>safety deserve neither liberty nor safety." - Ben Franklin
>http://www.users.cloud9.net/~brett/
>