P38A No power
- Thread starter palace
- Start date
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- Posts
- 58,170
- Location
- Preston Lancs.
This is true. Won't be coil packs either then.
- Posts
- 19,297
- Location
- Buckinghamshire, UK. ('95 DT)
You're saying 1 whole bank isn't firing? Any fault codes anywhere? Must be something?
Same on gas and petrol so cannot be fuelling.
Presumably coils span even and odd numbers and hence Wammer's comment? Unless someone put them back in the wrong order?
Some sort of sensor for 1 bank? Knock sensor? How about if you disconnect the lambda sensors?
Same on gas and petrol so cannot be fuelling.
Presumably coils span even and odd numbers and hence Wammer's comment? Unless someone put them back in the wrong order?
Some sort of sensor for 1 bank? Knock sensor? How about if you disconnect the lambda sensors?
- Posts
- 58,170
- Location
- Preston Lancs.
Yes coils span even and odd numbers. Two plugs are fired at the same time as the system works on a lost spark principal. The firing cylinder is sparked along with an exhausting cylinder. Coil pack 1 fires cylinders 5 and 8, 2 and 3. Coil pack 2 fires 1 and 6, 4 and 7.
- Posts
- 19,297
- Location
- Buckinghamshire, UK. ('95 DT)
Would be ECM I imagine, unless the BECM does the lot on later models?
It was doing this before the coil packs were replaced?
If you pull the spark plugs on the even numbers, do they look the same as the odd ones?
It was doing this before the coil packs were replaced?
If you pull the spark plugs on the even numbers, do they look the same as the odd ones?
- Posts
- 58,170
- Location
- Preston Lancs.
Has to be the injection side then can't be coils. They fire odd and even at the same time. Has to be the ECM and/or the LPG linkup to it.
- Posts
- 16,479
Very odd it only fires on the odd cylinders only....as they are on both banks!!!
A good check of injector wiring to the ecu wouldn't go a miss.
A good check of injector wiring to the ecu wouldn't go a miss.
- Posts
- 19,297
- Location
- Buckinghamshire, UK. ('95 DT)
Ask MartinV8.
Did have problems myself after my top hat full engine rebuild (3rd engine in the car). Mine turned out to be blown headgasket (twice in 10 months). The problem with rebuilt engines is that the blocks can be from unknown history. Overheated, too many head changes etc. Mine seems okay after helicoiling the headbolt threads. After investing in magnecore leads, coil packs, plugs its running smoother now, maybe needs the LPG recalibrating. Keep going, you've gone to the expense of a turner engine so don't throw in the towel just yet. All odd cylinders down has me stumped but as suggested, could be ecu related?
sassanach
Well-Known Member
- Posts
- 1,496
- Location
- trowbridge wiltshire
was the camshaft supplied with the engine?
- Posts
- 58,170
- Location
- Preston Lancs.
Have a look and decide for yourself. http://www.nanocom-diagnostics.com/downloads/preview/bosch-motronic-v8
sassanach
Well-Known Member
- Posts
- 1,496
- Location
- trowbridge wiltshire
can you lift the 2-4-6-8 rocker cover and confirm that all the valves are opening to their fullest extent,ie all the valve springs are close to being coilbound.
- Posts
- 58,170
- Location
- Preston Lancs.
That would be both rocker covers then, cylinder numbers alternate side to side. I find it almost imperceptible that a cam shaft would fail only on even cylinders. This has to be something to do with the injectors or injection sequence.
- Posts
- 58,170
- Location
- Preston Lancs.
No not really, as i have said before this to me seems linked to the ECU or the LPG linkup to it.
