Rover V8 - starting issue
Discussion
Ranger 6 said:
richhead said:
Ranger 6 said:
Yes - we've done all that and are only getting the one spark at the turn of the key
Done what?richhead said:
try testing for a spark at the distributor end of the king lead,
Used the plug lead from No: 1 to checkGoing to get a new king lead anyway as we've broken the connector pulling it and shoving it through all the testing.
richhead said:
If there is a spark at the end of the lead
Yes - again just the one spark at each turn of the keyrichhead said:
Getragdogleg said:
Does it have an oil pressure sender unit that tells the ignition side of things all is well ?
I have had similar faults on other cars that turned out to be this system being broken, the pressure gauge still worked but the other circuit in the sender was goosed.
That , and all other safety systems would be rulled out it the coil is getting a voltage and the coil earth being switched, it sounds like the op has tested thisI have had similar faults on other cars that turned out to be this system being broken, the pressure gauge still worked but the other circuit in the sender was goosed.
Belle427 said:
Is the rotor arm actually spinning around properly?
Not uncommon for the drive gears to strip teeth.
In a V8? They're all metalNot uncommon for the drive gears to strip teeth.
But yes, everything is turning correctly and timed
Just to explain what i mean by testing the switching, disconect the low tension leads from the coil and connect a light up test lead instead of the coil, the old style ones with a bulb are best for this, and crank the engine, it the light flashes then the fault is as i said either plug leads/coil its self, or rotor arm/cap.
Sorry if this sounds patranizing, but this is the best way to check everything else, and cap/rotor/leads can easy be tested with a continuity tester.
Sorry if this sounds patranizing, but this is the best way to check everything else, and cap/rotor/leads can easy be tested with a continuity tester.
richhead said:
Just to explain what i mean by testing the switching, disconect the low tension leads from the coil and connect a light up test lead instead of the coil, the old style ones with a bulb are best for this, and crank the engine, it the light flashes then the fault is as i said either plug leads/coil its self, or rotor arm/cap.
Sorry if this sounds patranizing, but this is the best way to check everything else, and cap/rotor/leads can easy be tested with a continuity tester.
No, not patronising at all - welcome your inputSorry if this sounds patranizing, but this is the best way to check everything else, and cap/rotor/leads can easy be tested with a continuity tester.
Not sure we did this - so will try
Thanks
finlo said:
If my memory serves me right the RV8 oil pressure switch is in the fuel pump circuit but is bypassed while cranking.
I've had a load of issues with cheap senders and it's never stopped the engine runningThe fuel pump can be heard running through all these tests - as well as the smell of fuel not being ignited
littleredrooster said:
Do you have a different rotor arm you could try? I have recollections of a batch of counterfeit (i.e. crap) Lucas rotor arms coming from China. Looked the part, but sent the spark straight to earth through a hairline crack.
This one has been running fine for a while, and yes, it's been closely inspectedrichhead said:
Just to explain what i mean by testing the switching, disconect the low tension leads from the coil and connect a light up test lead instead of the coil, the old style ones with a bulb are best for this, and crank the engine, it the light flashes then the fault is as i said either plug leads/coil its self, or rotor arm/cap.
Sorry if this sounds patranizing, but this is the best way to check everything else, and cap/rotor/leads can easy be tested with a continuity tester.
If we try this and it's not switching - is it the dizzy?Sorry if this sounds patranizing, but this is the best way to check everything else, and cap/rotor/leads can easy be tested with a continuity tester.
Ranger 6 said:
richhead said:
Just to explain what i mean by testing the switching, disconect the low tension leads from the coil and connect a light up test lead instead of the coil, the old style ones with a bulb are best for this, and crank the engine, it the light flashes then the fault is as i said either plug leads/coil its self, or rotor arm/cap.
Sorry if this sounds patranizing, but this is the best way to check everything else, and cap/rotor/leads can easy be tested with a continuity tester.
If we try this and it's not switching - is it the dizzy?Sorry if this sounds patranizing, but this is the best way to check everything else, and cap/rotor/leads can easy be tested with a continuity tester.
If its not switching, does it have a good 12v feed? and when cranking?
Does it gave continuity between the earth side and the amplifier on the distributer?
Is the dizzy turning?
Is the hall sensor working on cranking? can test this with a multimeter.
Just be aware the amplifiers can be shorted easy, so be careful with it.
there really isnt much else to go wrong tbh.
Its a fairly simple system on those old rovers.
I'd forgotten all about this - so apologies for being one of those 'who never came back...'
I sent the bus off for some work on the bulkhead corners and the new engine to be fitted. Dr Land Rover picked up a spare dizzy off the shelf (for his son's comp safari racer) and stuck that in - yes, it fired up straight away.
The old 3.5 is now being replaced by a rebuilt 3.9 - and it'll have a new dizzy so when it goes in he'll know that everything is working - well as much as everything on an old 90 does....
I sent the bus off for some work on the bulkhead corners and the new engine to be fitted. Dr Land Rover picked up a spare dizzy off the shelf (for his son's comp safari racer) and stuck that in - yes, it fired up straight away.
The old 3.5 is now being replaced by a rebuilt 3.9 - and it'll have a new dizzy so when it goes in he'll know that everything is working - well as much as everything on an old 90 does....
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