enigine cut every 5 sec for first 15 min

[cobram at juno.com]

 "Denis" <sparkplugvw at hotmail.com> writes:
> The engine cut maybe 1/5 sec to 3/4 seconde long. It seems its the 
> fire cause it cut then run , cut then run.... the cut is so sharp 
> that it cant be the fuel pump or the fuel system.

Yes, it can, if the fuel pump cuts out car instantly dies.  Jump the fuel
pump relay (wire across the two larger spades), if the problem stops
you've got a bad relay, or maybe some corrosion at the fuse box.  Since
you recently changed the fuel pump, check the wires in the trunk for
chafing or grounding, or maybe even a loose connector at the sending
unit.

 If the cutting out occurs during acceleration, then you might have a
tear in the intake boot, push and lean on the boot and see if you can
replicate the cutout or make the car stumble.  

Then there's also the possibility of the coil cutting out, or even the
ignition switch...plenty in the Bentley on testing those.

A friends 1990 100 had a similar problem recently, drove us nuts trying
to figure it out because it was an intermittent problem...in this case it
ended up being a bad coil.        

BCNU,
http://www.geocities.com/cobramsri/