voodoo51

Hi
There is a problem with hot start. When the car is hot (after driving) it's hard to start engine. Sometimes it takes 10 minutes to start engine.
What could it be?

It's 930 turbo (1986 year)

Thanks in advance
Sergey

WPOZZZ

What kind of starting problem? You crank and crank and it doesn't start? When I had my SC I had a similar problem and it turned out to be the fuel accumulator. Have you tried to lift the sensor plate?

voodoo51

Yes, I crank and crank and it doesn't start.
I haven't tried to lift the sensor plate yet

TT Gasman

Accumulator

Mark Houghton

Sounds like a voodoo curse to me

You could try messing with the air flow sensor plate as suggested (but push it down slightly to send fuel to the injectors, as that's the direction of air flow on a 930. At rest, it's already at it's fully upward position so lifting it won't do anything).

Also, check your spark when she won't hot start. Could be your CDI is showing some problems, maybe getting heat soaked and malfunctioning? Just a thought.

TT Gasman

There is a good thread on Pelican about starting issues.

voodoo51

Could you please give me the link?

Mark Houghton

http://forums.pelicanparts.com/911-9...snt-start.html

voodoo51

Thank you

voodoo51

I haven't bought this car yet. In several days will go to other town to take the car ))
I found out some more details about this car hot start problem.

There is no problem with hot start if crank at once after turning off the engine. Also there is no problem if passed several hours. And if crank after 5-10 minutes etc after turning off the engine sometimes it takes 10 attempts to start the engine.
And also the injectors were changed. It didn't help.

mooney265

When mine did the same thing it was due to the WUR settings causing a lean condition.

I believe the heat soak in the engine caused the WUR to remain in the Warm CP settings and that was a bit too lean for a restart with no remaining fuel pressure.

Like Mark suggested, push down on the Air Flow Plate a little while trying to start [in your no-start conditions] and if it starts right up, your too lean...

voodoo51

What do you think what is the maximum cost of solving hot start problem?
Maybe I need to buy this car before the source of the problem will be located.

Thanks
Sergey

mooney265

If you do the work, probably just "time." You'll need some CIS gauges, though - - $100

You could be looking at a fuel accumulator: $250 for Part. But, you won't know until you stick the CIS gauges on it...

A quick read with pictures of the gauge: http://forums.pelicanparts.com/porsc...questions.html

voodoo51

Sounds good. I was afraid that it could cost about 4.000$ or more.

mooney265

have you had a PPI done by a reputable shop? that's where you could run into some $$

1. Leaky cylinder[s]
2. Broken head studs
3. Worn syncros in transmission

All of the above require pulling the engine.