Hi there I have fitted a fmic sent it to get the map checked . The guy mapping it has made it safe but there is a hesitation before boost and slight misfire problem around 6000 rpm intermittent only happens mabye 1 in 5 pulls from low revs.
1998 uk2000 terzo mods include
440cc injectors
Fuel pump
Td05
Fmic
K&n filter
Apexi power fc
Turbosmart manual boost control
Balies bov

Things I have checked for
Boost leak holding boost ok
Cleaned down what earthing points I can see
MAF stalling when disconnected
All vacuume lines etc fine

The car was running 100% before I removed the tmic
My next move would be to try a crank sensor ?
Any help is much appreciated I know a bit about Subarus but this is a bit over my head.

 

If the only things you have changed are the FMIC and the remap then something must be wrong with one or the other. Who did the map?

 

as you are likely to be running more boost after the map then before, it may be something like a old coil pack or plug gap too big,(not sure if your year runs the single coil and leads)
everyone will also recommend getting rid of the Baileys DV, they are ****e.

 

What did the mapper suggest it was?
Also what does unplugging the maf sensor tell you? It tells you nothing.

How old are the plugs,what did you gap them at?
How come you run a MBC? Does the apexi ECU not have boost control?

 

Yes it was boosting more after I fitted the fmic I gave it straight to Gavin at g sport cars he mapped it last time when I changed the turbo and injectors done a great job was running at 296hp

He checked gap of plugs I think he said 0.6mm from memory

Yes it runs the coil in the middle and leads.

The balies has been on it for years it prob has had it by now.

 

The plugs turbo and injectors have only been on around 4k miles since I had the top end rebuild after h g failure.

No I don't think the power fc has that function unless you have ebc to work with the ecu. I am willing to be corrected though not 100%

 

This is the problem the fmic all seem to be fine. I've double checked it

Gavin at g sport mapped it he was having bother this time data logging the afrs through the apexi ecu and linked his separate wide band to double check them.

He said the rpm was jumping off the scale intermittently and that when the miss fire was happening.

 

Over revving off the scale,,clutch on way out or can't handle the extra power?
Did the mapper look into why he couldn't datalog AFR?
Do you have the log files? And I'm assuming it was road mapped?

 

Clutch is new when the head gaskets where done

The car is no more power than before as this has started to happen he said sort the problem before we go for more power.

It wasn't over revving it was like glitching on his data log jumping off the scale then back down. At 6k rpm
Could it be a crank sensor ? Or a tps? Or coil problem?

He was able to data log the afr but it wasn't a smooth line so he checked it with his wideband.

 

Might be something as simple as a defective plug lead?

 

Yes hopefully it will be something like that a friend has a few classics in a shed so will try and change one thing at a time and see if that works

I was thinking of trying the crank sensor first then as you say plug leads and coil. Any suggestions if that doesn't work?

 

This is the data logging Gavin took shows the spike in rpm etc. Can anyone shed any light on what this misfire at 6000 rpm and a slight hesitation comming on boost sometimes??