RE: Cold start and TT fuel enrichment

[Chris Coracini <Coracin@usdl.com>]

the TT fuel enrichment works by interrupting the signal from the temp sensor
to fool the FI into thinking the car is cold, thus enriching the mixture.  i
could see that as related to your cold start problem.  check the connection
at the temp sensor and check for continuity of the wires (test light or ohm
meter) between the temp sensor and the TT module, and then wherever the TT
hooks up to.  if there is a bad connection in the TT module circuit, it may
interrupt the signal from the temp sensor entirely, so your FI brain doesn't
know what temp the engine is.  

chris
86 16V scirocco


> -----Original Message-----
> From:	Rich Deede [SMTP:rdeed@UDel.Edu]
> Sent:	Monday, March 01, 1999 1:26 AM
> To:	scirocco-l@scirocco.org
> Subject:	Cold start and TT fuel enrichment
> 
> Ok now that I'll be fixing my car all on my own, I have question.  My car
> has always had a cold starting problem since I've owned it.  It cranks
> fine, but I have to hit the gas to get it to catch and once it does catch
> I have to hold my foot on the gas with it at about 3000 rpm's for a minute
> or two(depending on how cold it is) until it's warm.  if i don't hold my
> foot on the gas, it will stumble horribly and idle at about 200-300rpm's
> and stall out.  Now where should I start my investigation? And what should
> i do to check the problem?  
> My second question might relate to the first but I'm not too sure.  My TT
> fuel enrichment is not working and I was wondering for those of you
> familiar with how it works, where should I look to find out whats wrong?
> Could it be related to my cold start problem?  Any advice would be greatly
> appreciated.
> 
> 
> 
> 
> Rich Deede
> University Of Delaware (Communications)
> 1987 Scirocco 16v
> 
> 
> 
> 
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