[V8] 10 valve issues

[Kent McLean]

eric anderson wrote:
> My 88 10 valve 90 quattro ... if it's dead cold it will crank for 10-15 maybe
> 20 seconds before it finally coughs to a rough idle and suffocates under any
> throttle.....

My old 10V (Bad Puppy) had a slow starting problem when cold. The list
suggested a one-way check valve at/in the fuel pump, or possibly leaking
injectors.

A bad check valve lets the pressurized fuel drain back to the tank, forcing
a long crank while the pump pressurizes the line on a cold start (or sitting
long enough to drain back). The leaking injector(s) means it drains from the
other end, but the same result.

-- 
Kent McLean
1999 A4 Avant, V6 Tiptronic
1990 200 Avant mit V8 conversion
gone: 1990 V8 w/5-speed and other mods
gone: 1991 200 TQA #3, with mods
gone: '91 200 TQA x2, '94 100 S Avant, '89 200 TQ "Bad Puppy"