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[stuvaux]

Hi all

Over the past few weeks, my Omega (2.5 V6, LPG converted) has been a bit slow on starting. It then got worse a few days ago. I read codes, came up with 19, so replaced the crank sensor.

However, the problem is still there. I did forget to replace the vac pipe on the fuel pressure regulator, so thought that might be the problem. I replaced that, but still no joy. I am thinking it must be a fueling problem as the car runs fine on LPG (once I can get it started and switched over!)

Any ideas would be very much appreciated!

Thanks

Stu

[stuvaux]

Forgot to mention, checked codes again and the 19 has now cleared

[tunnie]

Do you mean the cranking is slow? Or it's normal but takes ages to fire?

[stuvaux]

Do you mean the cranking is slow? Or it's normal but takes ages to fire?

Sorry should have made that clearer! Turns over fine but taking ages to fire. It is definitely attempting to start. It will start sometimes, run for a few mins and then go lumpy and cut out. Runs fine on LPG

[stuvaux]

Checked vacuum connections etc. Is there anything obvious I may be missing?

[stuvaux]

I'm hoping the new crank sensor isn't faulty....surely if it was though it wouldn't run on LPG normally, and the fault code 19 would still come up?

[ffcgary1]

Code 19 sometimes does not show up, was the crank sensor an origanal gm part or copy(pattern)
if not gm thats your problem they are crap always by gen gm.

[stuvaux]

Code 19 sometimes does not show up, was the crank sensor an origanal gm part or copy(pattern)
if not gm thats your problem they are crap always by gen gm.

It is a genuine GM one yes. But surely the poor running and stalling would still happen when running on LPG (which it doesn't)

[Entwood]

Code 19 sometimes does not show up, was the crank sensor an origanal gm part or copy(pattern)
if not gm thats your problem they are crap always by gen gm.

It is a genuine GM one yes. But surely the poor running and stalling would still happen when running on LPG (which it doesn't)

When was the last time the fuel filter (petrol) was changed

[stuvaux]

Code 19 sometimes does not show up, was the crank sensor an origanal gm part or copy(pattern)
if not gm thats your problem they are crap always by gen gm.

It is a genuine GM one yes. But surely the poor running and stalling would still happen when running on LPG (which it doesn't)

When was the last time the fuel filter (petrol) was changed

Now that is a good question - not recently 

I was thinking that may be a possible culprit

[05omegav6]

Any fuel in it?

Sounds like a stupid question, but estates are prone to fuel starvation if left on a slope with less than a quarter tank.

If in doubt, put AT LEAST 2 gallons into it and report back

[stuvaux]

Any fuel in it?

Sounds like a stupid question, but estates are prone to fuel starvation if left on a slope with less than a quarter tank.

If in doubt, put AT LEAST 2 gallons into it and report back

That is something else I had been thinking too. It should have some in there, the gauge is reading just under the 20 mark and the range is saying 87 miles! Still possible though. Will have to try it tomorrow

[dbug]

Not unknown for new GM crank sensors to be faulty

[stuvaux]

Not unknown for new GM crank sensors to be faulty

Surely it wouldn't run well on LPG if crank sensor was faulty....or am I wrong in thinking this?

[05omegav6]

Not unknown for new GM crank sensors to be faulty

Surely it wouldn't run well on LPG if crank sensor was faulty....or am I wrong in thinking this?

Electrically the only difference between petrol and lpg is which injectors are working, so unlikely to be crank sensor, hence my fuel suggestion

Generally lpg is much more sensitive to weak or failing sensors than petrol, so I doubt it's a sensor issue