86 505 Turbo trying hard to start

[steve leung]

Could this pressure drop after pump stops running also due to the main
fuel pump checkvalve (if there is one) not holding pressure?

Steve 

On Tue, 18 Aug 1998 16:08:33 -0400 "Francois Dion"
<francois at hyperreal.org> writes:
>I wrote:
>> I have a 1986 Peugeot 505 Turbo. I just did
>[...]
>> I'm now at the point where I'm about to test
>> fuel pressure (what else could it be?). Thing
>> is, I have a pressure gauge that can fit Chrysler
>> products, and GM multipoint (and a custom
>> adapter for my Lancia). I was planning on
>> connecting the gauge to the cold start injector
>> feed on the fuel rail, but the threads are different.
>
>Pretty incredibly, the bolt from the banjo adapter
>at the cold start injector was the same thread as
>a Ford adapter I had. After going through my X1/9
>parts boxes, I found the proper copper spacers.
>So what I did was to fit the bolt facing away from the
>cold start injector and bolt this on, and connect it
>to the gauge. (for the curious, this is a gauge I
>bought at autozone and comes with the Ford
>adapter and without it supports chrysler/GM; their
>number is CP7818).
>
>I left the other end connected to the fuel rail. I removed
>the tachymetric relay, and put a switch in it's place
>(eveybody who plays with bosch l-jet has made a
>switch like that). Energize the fuel pumps, the
>pressure goes to 40 psi which is within norm for
>my N9TE engine (the N9T is higher). If I stop
>energizing the fuel pumps, it rapidly drops to
>20 psi, and then go down a little slower to 0.
>
>That sounds like a leaky injector, doesn't it?
>
>Ciao,
>Francois Dion (francois at hyperreal.org)
>--
>Member: FLU #1722, PCNA
>http://www.fortunecity.com/silverstone/zagato/101/launch.html
>Alfa Romeo, Fiat, Lancia, Peugeot, Volvo, Solex
>
>

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