Date:         Fri, 25 Oct 2002 10:59:11 +0100
Reply-To:     Jamie Bowen <jamie.bowen@ORCHESTRIA.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jamie Bowen <jamie.bowen@ORCHESTRIA.COM>
Subject:      '89 2.1i digifant cutting out. Really need some help on this
              one... ; NOT SOLVED!
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Still got this damn problem. I thought I had fixed it but its back with a vengence.
 
I get an intermittant cut out when driving that lasts for around a second and then the engine recovers. If it had enough revs to carry it through the second that is. If I'm pulling away it will cut. I happens under no particular conditions, when the engine is hot or cold, at speed an when going slow. It seems to happen more under load, but I think that I am just noticing it more then.... I seems pretty random anyway.
 
Last night I drove with a timing strobe attached to cylinder no 1 and observed that there is still a spark when the van cuts out. This must mean that there is fuel starvation right? I guess that fuel starvation could come from either blocked fuel lines/filter or bad pump, or from the ECU telling the injectors not to inject. I replaced the fuel filter after the test, but to no avail. The fuel pump is obviously working some of the time. Could it be a bad fuel pump relay?
 
What signals does the ECU use to determine how much fuel to squirt? I'm guessing that it uses engine temp (temp II sensor), RPM (from the coil?) and engine load (from the AFM). Am I on the right track here? Is there anything else? Presumably on a digifant the O2 sensor is also used....
 
Any suggestions will be greatfully recieved! 
 
Jamie.
 
I'm going to be SO happy when I get this fixed......