Thanks everyone for the tips. Turns out it was the gas cap. The code
came on at about a half tank of gas and was on for a few days. (I never
stop for gas until the fill light comes on, cause I hate standing there
filling cars.) I filled it on Thursday and the light went out.
I did check the cap before and I seem to have a bit of a corrosion
problem on the lip of the filler tube. I'm trying to think of a way to
permamently fix that.
Rob S.
Bernd D. Ratsch wrote:
> Most of the time, we found that either the small vacuum line to the evap can
> or the actual line to the pump was loose/leaking...don't rule out the gas
> cap though.
>
> - Bernd
>
> -----Original Message-----
> From: owner-dakota-truck@bent.twistedbits.net
> [mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of Jon Smith
> Sent: Wednesday, November 26, 2003 5:43 PM
> To: dakota-truck-moderator@bent.twistedbits.net
> Subject: DML: Re: Code P1494
>
>
>
> The TSB info you posted is nothing more than a bulletin to "advise"
> technicians to look somewhere other than the LDP (leak detection pump) as
> the faulty part which caused the code to be set. However it does not rule
> out a faulty pump.
>
> Check to make sure there is power going to the LDP, without a scan tool to
> acutate the pump, check for voltage while it's commanded on during the
> self-test (run the test when the motor is bone cold). Also check for
> leaking or plugged vac. lines going to the LDP. Usually a collapsed vac.
> elbow or oil-clogged line will prevent enough volume of vac. to allow the
> pump to actuate properly. T into the LDP vac. hose at the pump with your
> vac. gauge, it should have engine vacuum at all times, watch the gauge as
> the pump cycles. If it drops below 13" when the pump actuates, the lines
> are a culprit.
>
> Hope you've got a FSM =)
>
> -Jon Smith
>
> Does anyone have any more info on this?
>
> Thanks,
> Rob S.
>
>
>
>
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