Found my running problem, and it SUCKS!!!!

[jdbubb at verizon.net (Dan Bubb)]

Have you checked the basics such as cylinder compression, cam timing, vacuum 
leaks?

From: "Brendan Doyle" <lord_verminaard@xxxxxxxxx>
To: "Brian Haygood" <brianhaygood@xxxxxxxxx>
Cc: <scirocco-l@xxxxxxxxxxxx>
Sent: Saturday, May 26, 2007 5:40 AM
Subject: Re: Found my running problem, and it SUCKS!!!!


> An update..... I pulled the injectors from the '84- (looked like OEM, they 
> were Bosch, plus they also had the VW-AUDI emblems on them, the ones in 
> the '81 did NOT)  and swapped them into the '81, a quick test of the spray 
> patterns and they looked great.  Also took the 0-rings out of the 84 as I 
> knew they had been replaced not more than a year ago.  The '81 really 
> feels better- idles a little smoother but still rougher than I'd like.  It 
> still hesitates off-idle about 10% of the time.  Also, it still really 
> does not feel like it's running at 100% power, as I swore the basically 
> stock 1.8 8v in the 84 (with 300k) was quicker.  With a 2.0 at 10:1, 
> ported JH head, and a G-cam, this thing should fly.
>
> A summary:  I've tested everything electrical that I can possibly test. 
> The exception- ISV duty cycle.  I've also not done a pin-out test on the 
> ECU or knock box or any of that.  I've swapped the junk ignition 
> components for all the good stuff the '84 had, a new-ish 16v coil, 
> Neuspeed wires, OEM Bosch cap, and a decent set of Bosch plugs.  The plugs 
> were fouled up a little, I plan on replacing them soon.  I built a DPR 
> harness and set it to around 7.5-8.  (made no difference when it was set 
> to 10)  I swapped the fuel pump from the 84, which was only about 6 months 
> old.  New fuel filter.  I've run 3 tanks of gas through it since I 
> received it, each time with fuel system cleaner.  I plan on checking 
> lifter adjustment when I replace the valve cover with a G60 unit.
>
> Another curious oddity- when shutting the car off, it will sometimes 
> diesel- i.e. after clicking the key off, it will kick and fire a few more 
> times.  The Bentley says this is a timing issue, but I've set and re-set 
> the timing???  I have the timing set just a hair below where it starts to 
> ping- which is just a tad above stock timing.
>
> About all that's left to do is just wait until I yank this engine and drop 
> in the TDI.  :P
>
> Brendan
>
>
> ----- Original Message ----
> From: Brian Haygood <brianhaygood@xxxxxxxxx>
> Cc: scirocco-l@xxxxxxxxxxxx
> Sent: Friday, May 25, 2007 10:54:05 PM
> Subject: Re: Found my running problem, and it SUCKS!!!!
>
> Did you check your fuel pressure?  I'm not sure, but would fuel pressure
> too low cause a bad pattern?
>
> BH
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