Thread: Engine miss lack of power V8

Sorry, duplicate post.

I have a induction tester that gives me an indication a fault code if there is a fault with spark. I loaded the engine until the misfire occurred and no faith showed on my spark tester . I have not tested the fuel pressure as yet . As a matter of ensuring some reliability with the vehicle I have a new MAF sensor . New coils ,new injectors And new CPS which I will fit once I have determined the issue

The CPS gives a single warning (complete failure while driving) then fails completely.
same for fuel pumps, they dont tend to fade away---
Not my money but at this life stage of the vehicle a set of coil paks(if still originals) would be a good idea anyway...

wiring - "which lead to which pak" diagram on here somewhere, maybe in the Good Oil Forum..

buy a cheap ( $20) bluetooth OBD2 connector and see what faults are there..

I have vide tomorrow scan tool land Rover specific and the only fault showing is as stated in my original post. Also used a snap on scan tool same result

Vident scan tool

single cylinder multiple misfire,,
Ok, so could be A plug, A lead, or A coil pak,,
or A head gasket....

have you pulled THAT plug??
a nice clean one may mean its been constantly steam cleaned...

pull a few plugs and compare...

It has new leads , new plugs, compression tested 125 +/- 3 psi across all cylinders no 4 plug black( unburnt fuel). Rest of plug fine . Replaced no 4 plug with known working plug problem still exists

I will start to pull manifold tomorrow and replace coils, injectors and fuel pressure test