Cold Start Problem

[Ben Swann]

On Monday, April 08, 2002 2:53 PM, Chris Dyer [SMTP:chrisdyer at hotmail.com] wrote:
> bad cold start valve, or ground to it?

No I ran ouput tests and verified it pulsed - 10 nice spritzes for 10 sec.

>
>
> >From: Ben Swann <bswann at worldnet.att.net>
> >Reply-To: "bswann at worldnet.att.net" <bswann at worldnet.att.net>
> >To: "'quattro at audifans.com'" <quattro at audifans.com>
> >CC: "SWANN (E-mail)" <bswann at worldnet.att.net>
> >Subject: Cold Start Problem
> >Date: Mon, 8 Apr 2002 14:34:20 -0400
> >
> >I've pretty much gotten everything tied down and bolted back together after
> >what started as an exhaust manifold gasket leak precipitated into a major
> >teardown & rebuild with some upgrades.
> >
> >There were some annoying and outstanding issues with the fuel injection
> >system, namely the ISV and Idle screw (both replaced) causing the engine to
> >not maintain idle.
> >
> >Now I have a remaining issue with the engine not starting right away when
> >cold.  I replaced the injectors last year, and replaced the o-rings when I
> >reinstalled this time.  Fittings are all tight, and I have not been able to
> >locate any vaceum leaks.  Even if I run the fuel pump to make sure the
> >system is charged, it still takes three cranking cycles of about 5 sec each
> >before the engine starts, very slowly then increases, sooner with the help
> >of some throttle.  Once started, the engine settles into a healthy idle,
> >although a bit more lopy due to higher lift/duration cam.
> >
> >Haven't run fuel pressure tests yet, and am seeing if there is something I
> >may be overlooking.  I did replace the o-rings in the system pressure
> >regulator.  What are the possible culprits?
> >
> >Ben Swann
> >
> >'87 5000 tqa - Engine rebuilt and running...Elgin 270i260e cam, lifters &
> >techtonics springs, new rings and bearings, seals.  T03/K26 hybrid turbo,
> >2-Piece Exhaust manifold, highflow cat and 2.5" Stebro exhaust.  Bypass
> >valve and supplimentary fuel injector installed(but not connected to fuel
> >yet) in intercooler. 200 Flywheel, Clutch and Pressure plate.  Using
> >existing QLCC chip & Schrapnel Knob for control - set for 1.7 bar max
> >during break-in.
> >