Ten Second Start Up

geneandbolly · 13-09-11, 10:42 AM

Does anyone know why my quattro takes around ten seconds of turning over before the engine starts when cold? when it's hot it fires up in a flash but when cold always this prolonged "giddy up" caper! interestingly enough, the quattro we hired in may which is of the same type and year also behaved this way..

hmm...

craig

yeti · 13-09-11, 11:04 AM

Could be fuel draining back down the lines? My little polo suffers with this so I just prime the pump a couple of times before cranking.

Coxy · 13-09-11, 11:09 AM

john johnson · 13-09-11, 11:22 AM

no isv

4v6 · 13-09-11, 11:27 AM

Warm up regulator/thermotime switch etc?

dgacampbell · 13-09-11, 11:41 AM

My 90 is the complete opposite, fires up straight away on first turn of the key when cold, when warm takes some persuasion??

john johnson · 13-09-11, 11:54 AM

check fuel pressures first so that residual pressure is all good then start looking at other things

dgacampbell · 13-09-11, 11:59 AM

Quote:

Originally Posted by dgacampbell

My 90 is the complete opposite, fires up straight away on first turn of the key when cold, when warm takes some persuasion??

sorry for hijacking your thread btw lol

Hanuman · 13-09-11, 12:10 PM

As JJ says. Fuel pressure sounds to be the likely culprit.

dgacampbell · 13-09-11, 12:13 PM

Quote:

Originally Posted by The Real MSH!

As JJ says. Fuel pressure sounds to be the likely culprit.

On both vehicles?
I always wait the couple of seconds for the fuel pump to prime, and start as soon as i hear it stop tho?

13-09-11, 11:04 AM	#2
yeti Senior Member Classic Audi Club Member Join Date: Oct 2009 Location: Derby Posts: 1,166	Could be fuel draining back down the lines? My little polo suffers with this so I just prime the pump a couple of times before cranking. __________________ 1990 Coupe Quattro (WTF did I buy that for?) Half a 1983 Coupe FI (long term parts shelf) 2003 Cors-arrrgh More Polos that you'd ever believe No time, no money, all the wrong tools and a workshop that's too far away

13-09-11, 11:09 AM	#3
Coxy 4 Ring Mafia Classic Audi Club Member Join Date: Jul 2007 Location: on the side of a hill in Shropshire! Posts: 28,215	ISV?

13-09-11, 11:22 AM	#4
john johnson Moderator of sausages Classic Audi Club Member Join Date: Sep 2008 Location: sheffield Posts: 13,331	no isv __________________ Mr OCD http://s159.photobucket.com/albums/t144/jsquatts/ Daily rs4 b7 with buckets that play havoc with my piles And if you are reading this as James may would say ' you're a cock '

13-09-11, 11:54 AM	#7
john johnson Moderator of sausages Classic Audi Club Member Join Date: Sep 2008 Location: sheffield Posts: 13,331	check fuel pressures first so that residual pressure is all good then start looking at other things __________________ Mr OCD http://s159.photobucket.com/albums/t144/jsquatts/ Daily rs4 b7 with buckets that play havoc with my piles And if you are reading this as James may would say ' you're a cock '

13-09-11, 12:10 PM	#9
Hanuman Trickster Classic Audi Club Member Join Date: May 2009 Location: Heckling from the cheap seats, Phnom Penh, KoW Posts: 7,006	As JJ says. Fuel pressure sounds to be the likely culprit. __________________ I wish they would keep the damned Chinese away now that I can go home, so that I can enjoy Fish amok and a draught Angkor

13-09-11, 11:27 AM	#5
4v6 Ex Member Classic Audi Club Member Join Date: Dec 2007 Posts: 5,565	Warm up regulator/thermotime switch etc?

13-09-11, 11:41 AM	#6
dgacampbell Senior Member Classic Audi Club Member Join Date: May 2011 Location: Co.Armagh, N.Ireland Posts: 1,442	My 90 is the complete opposite, fires up straight away on first turn of the key when cold, when warm takes some persuasion??