Yet another fuel delivery question (95 Jimmy) - amp draw o..

Ok I finally got it! I tested the GRN/WHT continuity from the steering
column to the relay harness and it was fine. I tested the continuity from
the ECU to the relay and it also checked out. I then verified trigger at
the relay and also was able to run the pump with a jumper on the load side
of the socket. I verified 2 relays to be working flawlessly and had the
same intermittent results with both of them. The problem?? The connector
on the pump side of the socket was loose internally (hence it tested ok when
pressed with my probes on both sides but was intermittent when standing
alone. Some **very** carefull bending with a pick on that damn terminal
seemed to lock it in place and solve my problem. It starts every time now.
Vvrrooommmmmm... Case closed!

Thanks for all your help! To think I was about to throw an ignition switch
and crank sensor at this problem...
Andrew.

I am glad to see you found your problem. I'm going to just bullet some
thoughts so you'll know for next time.

*You should find and study a wiring diagram and locate each connection on
the vehicle...then you will figure out the shortest/direct path to the load.
On my c/k, a good place is through the fuse on the engine side of the
firewall by the evaporator. I don't know where your fuse is located or where
it compares to the socket on the relay...but either report to the pump. If
you bypass the fuse...provide a fuse in your jumper....or else $%&#$

*Testing (the pump) through the relay can go crazy if the contacts have
arc'd or something weird has happened.

*Testing through the OBD connector is okay if it has one.....although that
circuit opens when the relay closes.....at least on mine.

*Not sure what you mean on the fire and dumping fuel, etc. When the fuel
pump is hot-wired, fuel will only recycle to the tank unless something is
pulsing the injectors.....like cranking or the engine running...i.e.
reference pulses being received from the distributor. If you are dumping
fuel, your injectors are leaking.

I hope you read this and it helps.

skimmer


"AWN" <anixon1 DeleteThis @cogeco.ca> wrote in message
news:C2038A01.CCA8%anixon1@cogeco.ca...
> Skimmer,
>
> Thanks again. Are you saying that I should run a jumper from the relay
> socket to the fuse panel? I assume you mean strictly for testing
> purposes?
> If I were to leave that connected, it ranks up there with dumnping fuel
> into
> the carb with the wiper pump... Your thoughts on the ignition module may
> be
> a good place to look. My only concern about that is if I power the pump
> via
> the test connector under the hood, she fire right away. I've never had
> such
> a battle with an electical gremlin to date - I'm almost ready to take it
> to
> a tech even though that's against my religion (with the exception of
> tranny/drivetrain work).
>
> I'm still not sold on the fact that the ignition sewitch might be causing
> these issues... At $200 for a replacement I'm not ready to gamble on it
> yet
> though. The reason I suspect maybe the ign switch might be to blame is
> that
> I can turn the key to ACC several times before the pump engages. Once the
> pump engages, it starts right up. Some day I will figure this one out.
> I'm
> still secretly hoping that someone with the same issue will reply with a
> fix...
> Thanks!
> Andrew.
>
>
>
> in article JLaDh.130$bb1.28@newssvr17.news.prodigy.net, News Skimmer at
> NewsSkimmer DeleteThis @sbcglobal.net wrote on 2/22/07 1:28 AM:
>
>> Intermittent no starts (no fire/no fuel) can be caused be a bad ignition
>> module.
>>
>> On the fuel pump relay...you might consider removing it and powering the
>> pump directly with a fused jumper through the load side of the fuse.
>>
>> On my 93 c1500, you can power the pump through one of the OBD1 connector
>> pins which then passes through the fuse. You might need to check your
>> wiring
>> diagrams because that pin might not work if the relay is pulled out or
>> arc'd
>> close (welded closed in run position). I think my test connection opens
>> when
>> the relay closes. Make sense? probably not but study your schematics.
>>
>> skimmer
>