Fuel cut at high boost.

  • Thread starter Thread starter Boris Mohar
  • Start date Start date
B

Boris Mohar

Hello,

With the onset of cooler weather I am starting to experience a sudden cutout at
high boost.. As soon as I hit 15- 17 lb of boost the engine cuts out and than
it picks up instantly moments later al lower boost. I am told that 91 B230FT LH
system does not have a boost cutout and I know that I am not hitting the rev
limiter so what is cutting the fuel? The reason I suspect the fuel cut is that
the O2 meter drops instantly to zero from 0.9 Volts where it usually indicates
the boost enrichment. Could it be that the AF is over ranging and the computer
decides to cut fuel?



Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs http://www3.sympatico.ca/borism/
Aurora, Ontario
 
Boris said:
Hello,

With the onset of cooler weather I am starting to experience a sudden cutout at
high boost.. As soon as I hit 15- 17 lb of boost the engine cuts out and than
it picks up instantly moments later al lower boost. I am told that 91 B230FT LH
system does not have a boost cutout and I know that I am not hitting the rev
limiter so what is cutting the fuel? The reason I suspect the fuel cut is that
the O2 meter drops instantly to zero from 0.9 Volts where it usually indicates
the boost enrichment. Could it be that the AF is over ranging and the computer
decides to cut fuel?

Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs http://www3.sympatico.ca/borism/
Aurora, Ontario
Click to expand...

The LH 2.4 fuel system had a provision to turn off the fuel pump relay
based on an airmass/RPM map. With the colder, denser air available
these days you're getting into this area.
 
You must log in or register to reply here.
Back
Top