I've seen quite a few of those relays (Peugeot calls it a "Tachymetric
Relay") develop bad solder connections on the PCB (Printed Circuit Board)
inside. This will cause all manner of weirdness, such as you describe.
Simply unplugging or even just LOOKING at it will "fix" it temporarily, but
take no solace, as it WILL be back to haunt you again if you don't do
anything about it!
Pop the cover off and carefully examine the little circuit board. Look
around every solder connection, especially the larger components and
terminals. There is a phenomenon known colloquially as "Ring around the
Collar" by many Electrical Engineers. It is a tiny hairline crack that
forms a circle right where the solder meets the component lead. It may need
a magnifying lens to spot. If you locate one, simply flow some fresh
rosin-core solder from a decent hot soldering iron into the joint and
resolder it. It's probably a good idea to resolder everything once you are
in there, as there aren't that many joints. If you are not experienced in
electronic soldering, I will be happy to give some pointers.
The only other possibilities are bad contacts on the relay part itself,
intermittent (open) relay coil, or intermittent component failure.
(Junction breakdown on a Transistor, etc)
-Phil
----- Original Message -----
From: "John" <peugeot505turbo@hotmail.com>
To: <peugeot-L@yahoogroups.com>
Sent: Sunday, January 22, 2006 12:46 PM
Subject: [Peugeot-L] Re: 1991 405 S will not stay running (revised)
> OK, here's the scoop! The car now runs again! Why? I donno! I was
> checking the fuel pump relay with a test light. I connected the clip
> to the neg. battery terminal and the probe I belive pin 1 on the
> relay. The relay clicked, and I could hear the sweet sound of fuel
> rushing up to the injectors. Now the car is back to starting
> normally. What did I do? I can not see how I completed a circuit,
> since i was using a test light. I needed pos. on one end and neg on
> the other to make the light go on. So what happened? And more
> importantly, what do I need to do to correct the situation, as I am
> sure this is only a temp fix.
>
>
>
On
> --- In peugeot-L@yahoogroups.com, "(-Phil-)" <listacct@m...> wrote:
>>
>> Temporarily jumper the fuel pump relay and see what happens. If
> you do
>> this, and it's still not starting, check the voltage on the pump,
> if it's
>> there, but the pump isn't running, then you've found the problem!
>>
>> I had a 505 Wagon once, where the scavenger pump died, (as in all
> my 505's)
>> and then later developed a leak on the hose in the tank, such that
> it would
>> suck air when the tank was below 1/2, and buck and jerk wildly on
> turns. My
>> present wagon doesn't have a working scavenger, and the only
> symptom is the
>> pump "gurgles" a bit when the tank gets below 1/4, but it never
> runs poorly.
>> Anyway, I guess my point is that fuel problems on fuel injected
> cars can
>> have many symptoms.
>>
>> -Phil
>> ----- Original Message -----
>> From: "John" <peugeot505turbo@h...>
>> To: <peugeot-L@yahoogroups.com>
>> Sent: Saturday, January 21, 2006 4:29 PM
>> Subject: [Peugeot-L] 1991 405 S will not stay running (revised)
>>
>>
>> > OK, Now the car just will not start. ( I view this as a positive
>> > thing, as before I was just chasing my tail) It is narrowed down
> to
>> > the fuel system. I have no/very little fuel at the fuel rail. My
> first
>> > question is should I hear the fuel pump when the key is first
> turned
>> > on? My 505 would make a distinct grunt/buzz when first turning
> the
>> > ignition on. I never really paid attention if this car does it
> too.
>> > (After 3 405's, I should know by now.)When should the pump come
> on? In
>> > the 'on' possition or in the 'start' possition? Second, if the
> pump in
>> > the tank goes bad, could this cause the car not to start? Third,
> what
>> > is the round bowl the fuel line enters next the battery? Fourth,
> any
>> > other advise or things I should be looking at? It got dark
> before I
>> > could really check to much. I did swap out the relay and check
> the
>> > fuses. Thanks for everyones help on this, all I can say right
> now is I
>> > am happy what ever went bad finally decided to go out. (Although
> I
>> > would be much happier if it decided to fix itself permanantly!)
>> >
>> > Thanks again,
>> > John
>> > 91 405 S
>> >
>> >
>> >
>> >
>> >
>> > Recommended format for your email subject lines:
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>> >
>> >
>>
>
>
>
>
>
>
> Recommended format for your email subject lines:
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> Examples:
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Recommended format for your email subject lines:
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Received on Sun Jan 22 13:44:29 2006
