E36 328i hesitation/cut at 2,000rpm in first only

[HaNs 226]

Installed my kill switch in the track car today

Now in first gear at 2,000 rpm at WOT there is a big cut (can't drive through it) in first gear only

Car is a 1995 obd1 manual. Kill switch kills ECU power, main battery, ignition and alt.

Any suggestions?

[HaNs 226]

Any ideas?

[*Glenn* 854]

Losing a connection in the wiring under torque or something to do with the way you have done this "Kill switch kills ECU power, main battery, ignition and alt" which could also be due to torque and engine movement

[HaNs 226]

Losing a connection in the wiring under torque or something to do with the way you have done this "Kill switch kills ECU power, main battery, ignition and alt" which could also be due to torque and engine movement

Seems odd that it only does it in first and always at 2000 rpm only.

[*Glenn* 854]

I realise that. Can you not pick up whether your loosing fuel, ignition or DME power supply on the dyno at work ?

[HaNs 226]

I realise that. Can you not pick up whether your loosing fuel, ignition or DME power supply on the dyno at work ?

Moved to Chicane Racewear so no dyno access during the week.

Might bypass the switch tonight and take it for a drive.

[HaNs 226]

By passed switch, still does it.

Didn't seem to do when cold. Will drive it cold tomorrow. Will also check coil pack resistance and maybe pump voltage.

Still has me confused as to why it only does it in first

[HaNs 226]

Intake clamp letting air in! Plug gap was way off also, but not an issue.