Fuel Issue

[Beer99C5]

Went to the dyno to try out COS5 on spray and did not get past some N/A test runs :frown: Although thanks to Joe, Chad, Lorenz, and Howard COS 5 is workin :cheers:

New racetronics Fuel Pump/hotwire kit put in to prevent any fueling issues.
Fuel pressure is 58 or so to 3000 RPM, and when put to 100% TPS it drops down as low as 35 PSI...

AFR @ 6k 15.1-15.3

I am hoping its the fuel filter (probably has 5k miles on it). Did not have time to troubleshoot and now I am offshore til Mid June.

http://www.retrorelics.net/jim/Boards/EFILive/Racetronics.jpg

[Doc]

What are you/the pcm, commanding when this event happens?

[Beer99C5]

12.6 is commanded in PE.

http://www.retrorelics.net/jim/Boards/EFILive/racetronics2.jpg

I think it is either the fuel Pump or hopefully the fuel filter (first thing I will change when I get home), then I will log Fuel Pressure on the street to try and duplicate it...

A few vendors have told me they have had 1 in 4 failure rate on the racetronics pumps. :bash:

[Beer99C5]

Here are the two logs:

http://www.retrorelics.net/jim/Boards/EFILive/Dyno1.zip

What you think Fuel pump, filter or something else?