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jdub · Joined: 04 Mar 2014 Posts: 72 Location: AZ

hmmm, not sure of timing of problem, since it needed a certain time window after a longer drive to happen.
it did seem when i did my pressure tests that simetimes its wouls hold pressure for a while and sometimes not as good. intermittantly accum.going bad ? i havent been able to replicate problem since , but it does run a little rough for a minute or 2 after sitting a long time, after firing right up.

since gas was coming from screw hole in accum. i willstart with that
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81 924 non-turbo

jason c · Joined: 13 Jan 2014 Posts: 1018 Location: Nwi

ThomasJoseph315 · Guest

your engine is flooded... did you wire a manual switch in wrong for the thermoswitch? Only thing that spaces out an hour for an engine to start is a flooding issue.

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Reedonkulus.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

jdub · Joined: 04 Mar 2014 Posts: 72 Location: AZ

yeah tom, since it only seemed to happen after a longer hwy dr (the hard start after an hr), maybe i had the timing a little too advanced after emissions when iretarded it some to be safe, and then advanced it back,
maybe that allows too mich unburnt fuel ariund and flood effect.?
i will see what the accum. solves, since that seems a certain need.
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81 924 non-turbo

jason c · Joined: 13 Jan 2014 Posts: 1018 Location: Nwi

jdub · Joined: 04 Mar 2014 Posts: 72 Location: AZ

so after the accumulator was replaced, i had the problem still, (intermittently)

using the thermo time switch bypass switch to get it started (after replacing it with a supposed working one off a ferari, but didn't work), i then have had it sitting a couple days.

this time it wouldn't start. fuel pressure before dist. was good, but not coming through injectors (just the cold start injector) .

then when i manually lifted the air intake metering plate, i got fuel at the top of the fuel distributor,

the plate was a little gunky and seems like it was stuck a little.

maybe this was main problem - don't know

I reached up in it and gave a little carb cleaner to free it up better - seemd to have worked .

when my air filter box was put back on and then clamped tight, it woudl struggle running (have good air filter of course).

i sprayed a little more up into the plate mechanism and it seems fine now

Q:
I'm wondering, is there any lube that should be done on it? I assume not, since a WD40 woudl collect dust and crud , - but oil or ???

T hanks !
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81 924 non-turbo

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

WD40 isn't a lubricant. It's a water displacer.

If your air plate is sticky, you'll need to rebuild it and make sure it is perfectly clean internally and the pivot point lubricated with a dry, fuel safe lubricant.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

jdub · Joined: 04 Mar 2014 Posts: 72 Location: AZ

i do have a graphite powder lube .
i'll shoot some up there at the pivot point

thanks
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81 924 non-turbo

jp928 · Joined: 20 May 2008 Posts: 9 Location: Australia

83 928, but same CIS. Had same problem, but my CIS has a 'warm start valve' - temp sensor feeds power (when cranking, and half to full hot) to a solenoid that drops pressure to assist starting. When I got the problem, I found the temp sensor showed ~20 Ohms, which was enough to prevent the solenoid firing. The 928 part was NLA, so I adapted a 924 part (adapt thread from M10x1 to M14x1.5) and problem fixed. If you have this temp sensor and solenoid, check the sensor's behaviour. The temp spec seems to have changed from 45C to 70C in some years.
jp 83 928S Euro 57k