High Rpm Miss
#1
I need some suggestions.......I have a high RPM, high load miss. My 3rd gen is cutting out for a split second around 5500 rpms when under boost. I have checked the volt. to the fuel pump and it is getting 12.4 V so I don't think it is fuel cut. It is almost like it stops firing for half a second and then kicks back in. I have checked duty cycle on the injectors and they are not maxed out. Anyone with any ideas???? Here are my related mods:
EFI PMS
Full non-seq
Open Exh.
Manual boost adj. (running 11.5 to 12.5 boost)
open intake
Walbro fuel pump
EFI PMS
Full non-seq
Open Exh.
Manual boost adj. (running 11.5 to 12.5 boost)
open intake
Walbro fuel pump
#6
A frequent cause of the fuel cut problem with the PMS is the knock sensor. It gave me fits too until PFS relocated the sensor higher off the engine. Problem totally went away. The sensor must interpret all sorts of engine compartment noise as "knock".
#8
OK, that's the second time I have heard of someone moving the knock sensor. I have thought about trying it, just worried about the safty factor. I guess I will move it and if I pop the motor, o well I wanted to do some port work anyway. Will make for a nice winter project
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