LPG v Petrol

Hi St.

it looks as though you have done a grand job finding and fixing the ABS fault.

can you summaries the cost v how many miles it needs on LPG to recover the fact the fault was made by an LPG installation.

You know what I mean?

Best wishes,

Currently Returning 15.5mpg on LPG

Cost per Mile = 22p

Similar on petrol would be = 39.6p per mile

Cost of ABS Unit from ebay = £250

Saving made running on LPG = 17.6p per mile

250 / 0.176 = 1420 miles or in my terms about 5.46 weeks of average mileage running to recover the cost of the ABS unit I bought with it running on LPG...

Is that what you meant!??

If it was a new unit from a supplier or worse Land Rover Unit Price say £1000

1000/0.176 = 5,681 miles or 21.85 weeks!

Saint I think you have forgotten that mpg would be higher on petrol....



..... but this does not alter the fact that the OPs question seemed a bit odd

Personnally I doubt it was the LPG cooling pipes that overheated the unit. With a hot exhaust manifold radiating lots of heat nearby, they may even have helped keep it cool(er)!!

Cheers

Jerry

Get a doozle !!!

jerrytlr said:

Saint I think you have forgotten that mpg would be higher on petrol....



..... but this does not alter the fact that the OPs question seemed a bit odd

Personnally I doubt it was the LPG cooling pipes that overheated the unit. With a hot exhaust manifold radiating lots of heat nearby, they may even have helped keep it cool(er)!!

Cheers

Jerry

Click to expand...

Very true...factor in the 12-15% less efficent nature of LPG and you'll get your figures...so that would be about 2-3 days!

Also, not many L322's suffer this damage unlike the BMW's where it is mounted lower and closer to the engine....the only thing I can think of is the coolant pipes running directly under the ABS unit and the 4.4 M62 runs at 105degC in the coolant system...and that is radiating quite a bit of heat, only an inch below the ABS module!!

Many thanks for this. I will be keeping mine on petrol, as it simply is not going to do the miles.

best wishes,

If you've got vap heater pipes under the ABS unit running on Petrol won't mean they get hot. It's normally just a loop off the heater hoses and doesn't have any valves to start stop the water.

doz said:

If you've got vap heater pipes under the ABS unit running on Petrol won't mean they get hot. It's normally just a loop off the heater hoses and doesn't have any valves to start stop the water.

Click to expand...

I know....

My point is that a stock M62 doesn't have these pipes running under the ABS ECU and as such won't suffer failure....as after speaking to a couple of remanufacturing companies, they say they rarely if ever see the unit come in from an L322, whereas the BMW version is a regular fail item!

The BMW E39 ECU is mounted in a hot spot above the R/H bank exhaust and gets warm and they suffer failure....

Only thing I can think of on mine to make the ABS ECU fail is the Vap coolant pipes running directly underneath it making it very warm!!

I do know the Vap is plumbed in constantly and there are no shutoff valves as this isn't my first LPG powered Rangie

Sorry that wasn't meant to come across as an "egg sucking" comment just trying to get a clearer pic of what you are trying to achieve. If it was me I'd just run the Vap heater hoses a different way. It's better to keep them short but my P38 manages ok and the vap on that is bolted to the N/S inner wing and the take off for the pipes is by the brake accumulator.

doz said:

Sorry that wasn't meant to come across as an "egg sucking" comment just trying to get a clearer pic of what you are trying to achieve. If it was me I'd just run the Vap heater hoses a different way. It's better to keep them short but my P38 manages ok and the vap on that is bolted to the N/S inner wing and the take off for the pipes is by the brake accumulator.

Click to expand...

It is the only thing I can think of that has fried my ECU....

Here's a pic of the ECU and Vap pipes running under....