suddenly missing two cylinders

[111TV]

starts fine runs on 4 have changed all coils and the driver unit but to no avail have put on reader no faults logged in active or stored have tried flash code read again no faults all i get is 1 12 has had a momentary miss that comes and goes the entire time ive had it [key on key off for a nano second ] and again no faults drives but lacks power [i had to i was 50ks from home] best around 2k ANY IDEAS or previous experience appreciated

 

[Immortality]

By driver do you mean the DFI module under the coils?

 

[Trevor loves holden.]

Leads or Plugs, if you remove both leads of the one coil and crank it you should see it spark post to post if it doesn't then something wrong with the dfi or coil. If its sparking at the coil then its like i said at the start.

 

[111TV]

By driver do you mean the DFI module under the coils?

yes have changed 3 times 1 came off running eng no problems

 

[Immortality]

Then you need to look elsewhere. Leads on the missing cylinders. Also clean the plugs and terminals on the DFI module and the CAS (crank angle sensor).

 

[Trevor loves holden.]

Yip look at the leads and plugs as well the pins inside the connecting harness for wear or bent pins on the DFI
.

 

[111TV]

new leads . new plugs. new crank sensor, new cam sensor, fires up but misses appears to be indesriminate as cylinder cutout test affects all 6 as well as injector cutout test does the same affects all 6 HELP

 

[Lex]

Have you replaced the dfi & coil packs, have checked the wiring plug to the dfi?

 

[111TV]

dfi and coil packs have been replaced 3 times one unit came off a running vehicle no better and perfect when refitted to donar vehicle so swapped out original to donar ran perfectly so what am i missing

 

[Immortality]

Wiring or plug issue?