Vauxhall V6 installation ran fine for first day and part of the second -
always OK from cold for first few miles

1) Connected to the rev counter wire - after a few miles it couldn't get a
stable signal and also the rev counter needle went nuts.

2) Moved to a coil feed - ran well for a while - when driving home from LPG
chap the car started running rough, tried the car later, LPG got no rev
signal and car EPG had its coil signal for 2 cylinders fried so only ran on
4.

ECU at repairers today

LPG man says it is a problem with my car, I think is a problem with the
Romano ECU.

What can the RPM sensor cable do to an ECU?

"Martin" wrote in message
...
Vauxhall V6 installation ran fine for first day and part of the second -
always OK from cold for first few miles

1) Connected to the rev counter wire - after a few miles it couldn't get a
stable signal and also the rev counter needle went nuts.

2) Moved to a coil feed - ran well for a while - when driving home from
LPG
chap the car started running rough, tried the car later, LPG got no rev
signal and car EPG had its coil signal for 2 cylinders fried so only ran
on
4.

ECU at repairers today

LPG man says it is a problem with my car, I think is a problem with the
Romano ECU.

What can the RPM sensor cable do to an ECU?

In theory, nothing as it's only an input to the gas ecu, there is no output
that could cause an issue. More likely the gas ecu wasn't looking for the
correct type of rpm signal but that doesn't solve your running problems.
Badger.

What can the RPM sensor cable do to an ECU?

In theory, nothing as it's only an input to the gas ecu, there is no
output
that could cause an issue. More likely the gas ecu wasn't looking for the
correct type of rpm signal but that doesn't solve your running problems.
Badger.

Could the gas ECU be faulty inside?

"Martin" wrote in message
...
What can the RPM sensor cable do to an ECU?

In theory, nothing as it's only an input to the gas ecu, there is no
output
that could cause an issue. More likely the gas ecu wasn't looking for the
correct type of rpm signal but that doesn't solve your running problems.
Badger.

Could the gas ECU be faulty inside?

Possible, but highly unlikely. The electronics (within the gas ecu) that the
rpm input feeds into would be fried if they tried to pass enough current the
opposite way to damage the vehicle in any way.
My own vehicle (Landrover discoII 4.0) threw a wobbly and had to have the
vehicle ecu reprogrammed by landrover, just after the installation of an lpg
system - making it easy to blame the gas system, but it was a simple
coincidence. The gas system was (is) basically the same electricals within a
different box as the one you have, assuming we are talking SGI systems.
Only way forward is to bite the bullet, replace what needs replacing, then
prove all is ok by driving the car on petrol for a few days before your
installer connects the rpm wire back up. Make sure you tell him that you are
proving all is ok by driving it and that if it fails again after connection
that it is legally his problem as he (not personally, but his equipment) has
caused it.
Badger.

Possible, but highly unlikely. The electronics (within the gas ecu) that
the
rpm input feeds into would be fried if they tried to pass enough current
the
opposite way to damage the vehicle in any way.

Hmm thats the impression I got from the installer and the importer, I have
NO complaints about people at all, nor how the kit was fitted (very neatly).

But thr RPM signal failing on two seperate sources just seems too
coincidental.

My own vehicle (Landrover discoII 4.0) threw a wobbly and had to have the
vehicle ecu reprogrammed by landrover, just after the installation of an
lpg
system - making it easy to blame the gas system, but it was a simple
coincidence.

I am not blaiming anyone I just want it all working

The gas system was (is) basically the same electricals within a
different box as the one you have, assuming we are talking SGI systems.

If SGI is sequential injection yes

Only way forward is to bite the bullet, replace what needs replacing, then
prove all is ok by driving the car on petrol for a few days before your
installer connects the rpm wire back up.

That is what I am going to do.

Make sure you tell him that you are
proving all is ok by driving it and that if it fails again after
connection
that it is legally his problem as he (not personally, but his equipment)
has
caused it.
Badger.

All I want is the car to work on petrol and LPG

I am not sure if I ever answered this but the rev cable had melted against
the ECR valve!

Possible, but highly unlikely. The electronics (within the gas ecu) that
the
rpm input feeds into would be fried if they tried to pass enough current
the
opposite way to damage the vehicle in any way.