7A excessive cranking upon start up

[theringmeister]

If the pump is newish the check valve is probably fine. Most of the time you can hear them, otherwise a smoke test works. You can Google that for any number of methods of doing one. Sent from my Sprint Samsung Galaxy S8.
-------- Original message --------From: Christopher Gharibo <cgharibo at usa.net> Date: 4/19/19  9:41 PM  (GMT-05:00) To: theringmeister <theringmeister at triad.rr.com>, Christopher Gharibo <cgharibo at usa.net>, quattro at audifans.com, 20v at lists.20v.org Subject: Re: 7A excessive cranking upon start up What's the best method to find vacuum leaks? I cant locate a vacuum leak. The injectors are relatively new.I have the Pierburg fuel pump. Is the check valve inside the pump?------ Original Message ------Received: Fri, 19 Apr 2019 09:34:35 PM EDTFrom: theringmeister <theringmeister at triad.rr.com>To: Christopher Gharibo <cgharibo at usa.net>, quattro at audifans.com,20v at lists.20v.orgSubject: Re: 7A excessive cranking upon start up> Sounds like a vacuum leak or fuel system is losing holding pressure... maybethe check valve is going bad?  Leaky injectors causing cylinder wash andkilling compression? What injectors are you using?Sent from my Sprint SamsungGalaxy S8.> -------- Original message --------From: Christopher Gharibo<cgharibo at usa.net> Date: 4/19/19  9:28 PM  (GMT-05:00) To:quattro at audifans.com, 20v at lists.20v.org Subject: 7A excessive cranking uponstart up My ‘91 coupe doesn’t start unless I help it with the gas pedaland even then, cranking is longer than it used to be. There are no codes.What’s responsible for the rpm surge upon start up?CG_______________________________________________quattro mailinglisthttp://www.audifans.com/mailman/listinfo/quattrohttp://www.audifans.com/kb/List_information