My car runs perfect when started and then ran for a short period of time. However if I run it for say 2 or 3 hours and then turn it off and let it set for a few minutes or even a 1/2 hour it sometimes doesn't start the first time I turn it over???

It usually starts the second time. I did notice once in awhile the key needed to be pushed in all the way or I had to tap the gas while turning the key.

Now this only happens once in awhile which leads me to believe it is bad gas or carbon built up. Anyone else have a similar situation.

 

This one's easy... :-) Oxygen Sensor. Bosch now recomends these be replaced everh 30000 miles. Lukly for us '95ers we've only got one!

Check out <a href="http://www.bosch-auto-parts.com" target="_blank">www.bosch-auto-parts.com</a> for the best prices. Not afilliated...yada, yada.

Hope that helps GTR!

cheers,

sean

 

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by GTR 993:
<strong>Now this only happens once in awhile which leads me to believe it is bad gas. Anyone else have a similar situation.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Howdy Bubba Geeter
I noze whut yall meenz bout da problum wit havin bad gas. I sumtimz has summa da baddest gas yall cud emagin, spechally frum eetin lotsa beenz. It wunce wuz so bad dat Shirleen had ta leeve da howse fur a hole dae til it aered out. Butt da dawg staid cuz yu no dawgs an how dey lyke sum smellz bedder en udders. Enywayz yur problim dunt soun like itz frum bad gas cuz yu diddint sey dat dere be dawgs hangin rownd yur car.
yur fren
JimBob

 

That is pretty common Spring Time behavior in the Mid-West and East. The fuel is still essentially a winter blend, with high RVP (a particular spec for Vapor Pressure). This high RVP fuel makes for easy starting in cold weather but boils/vapor locks in warmer conditions.

After you run and shut down the engine, the heat soak is probably boiling the fuel. When you crank, the injectors are spitting vapor and it needs to clear from the system. Giving some throttle increases the fuel flow and helps clear out the vapor. I would run the tank fairly low to get the old fuel out, and then fill at a station that does high volume. I would imagine that you are now starting to get a warmer weather blend of fuel and the problem will go away.

 

JimBob,

Your post has made my day - I may stop laughing soon! <img border="0" alt="[hiha]" title="" src="graemlins/roflmao.gif" /> <img border="0" alt="[hiha]" title="" src="graemlins/roflmao.gif" /> <img border="0" alt="[hiha]" title="" src="graemlins/roflmao.gif" />

 

Thanks for the info. it is greatly appreciated. JimBob I will try some Tums for my other problem. LOL

 

The DME relay is another possibility. I needed one last year -- $26 from Porsche. If yours has a 944 part number, it is worth replacing anyway.

 

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica"> The DME relay is another possibility. I needed one last year -- $26 from Porsche. If yours has a 944 part number, it is worth replacing anyway. </font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">This happened to me as well, the symptoms are similar enough so replace the relay if you have not already.

<a href="http://p-car.com/diy/relay/" target="_blank">DIY on p-car.com</a>