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Posted by: oldschool Sep 26 2010, 05:18 PM

This is the first time this has happen? after a long run I stop to get a drink,and it seem to be a bit harder to start, It was hot that day, Today I was out riding and as I was ready to put her in the garage, It did it again So here it is 1973 1.7 org d fI
today it was over 100 so do you think vapor?

Posted by: Tom Sep 26 2010, 07:26 PM

If you mean it is turning over OK, but doesn't want to fire, that has been discussed here. Do a search and you will see. I tried, but my search skills are obviously no good. I get x thousands of answers!??
Basically it is a heat problem "fooling" the ecu to be extra rich.
Tom

Posted by: oldschool Sep 26 2010, 08:53 PM

yeah it turn over easy but hard to fire, but only when I hit the gas does it fire up....sound dumb but I did put arco gas it the other day?

Posted by: jim_hoyland Sep 26 2010, 09:16 PM

Some year models you're supposed to gie ut gas when starting, IIRC

Posted by: oldschool Sep 26 2010, 11:08 PM

I never had that happen before, It always would fire right up.

Posted by: Tom_T Sep 27 2010, 01:40 AM

Jaimie - the owners' manual says to put the pedal to the floor & hold it while cranking until the motor catches (or a reasonable time cranking then retry) & release after started. That's D-jet SOP per Porsche.

If your fuel pump is still in the rear/engine compartment, then it's well worthwhile to get the reloc. kit (AA & ??) & move it up in the notch behind the steering rack cover per the factory service bulletin. I had mine done back in 78 after sitting it out at the Blythe Denny's coming back from summer water skiing, & no vapor lock problems after that!

Posted by: Tom Sep 27 2010, 08:14 AM

Found it this AM.
http://www.914world.com/bbs2/index.php?showtopic=99261&hl=
Tom

Posted by: mburkhart Sep 28 2010, 09:09 AM

So you're a believer in the vapor lock issue + fix? My car stalled this summer on a hot day, but there appears to be some debate on these forums about whether vapor lock is a real issue or not. I'm not sure what to believe at this point.

Posted by: bmtrnavsky Sep 28 2010, 06:41 PM

I have the exact same symptom as you... Get in in the morning and it fires right up. Motor 10 minutes down the road to the gas station, shut it down, fule up and it cranks over hard and fast for 30-45 seconds then slowly comes to life. Then it runs but wants to die for about 2-3 minutes.

I have my fuel pump in the front and that didn't help, but today when I fueled up I pressed the gas pedal to the floor and held it before I started cranking the motor and it fired up just like it does cold.

Posted by: oldschool Sep 28 2010, 07:16 PM

cool with this 110 heat i will give it a try.

Posted by: Jeffs9146 Sep 28 2010, 08:31 PM

FI or Carbed?

If FI then it's the CHTS!!

Posted by: Cap'n Krusty Sep 28 2010, 08:55 PM

Your reasoning is unclear, and your conclusion is unsupported and false.

The Cap'n