Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[megaomega123]

Would it be a good idea to swap injector 4 (the problem one) with injector 1 (a good one) and see if the problem moves with the injector or stays at the same cylinder?
How easy are they to swap? Are they just plug and play so to speak?

[sassanach]

just a couple of small points,the lpg nozzles on that setup must be huge as the lpg times are smaller than the petrol ones,ie way to big.secondly the lnjector  times are way different between the banks which on a car i recently played with meant the lambda sensors were cross linked(gotta thank the forum for that one i was totally stumped)

[Lazydocker]

Just spoken to an lpg installer and he suggested that the problem is more likely to be an injector than a leaky pipe.
Can the injectors be serviced? If not is it possible to buy the stag-300 injectors seperately somewhere?

Yep, injectors are readily available in banks of 3

I wouldn't start replacing stuff willy-nilly though

[megaomega123]

just a couple of small points,the lpg nozzles on that setup must be huge as the lpg times are smaller than the petrol ones,ie way to big.secondly the lnjector  times are way different between the banks which on a car i recently played with meant the lambda sensors were cross linked(gotta thank the forum for that one i was totally stumped)

How do I resolve cross linked lambda sensors?

[megaomega123]

Just spoken to an lpg installer and he suggested that the problem is more likely to be an injector than a leaky pipe.
Can the injectors be serviced? If not is it possible to buy the stag-300 injectors seperately somewhere?

Yep, injectors are readily available in banks of 3
I wouldn't start replacing stuff willy-nilly though

I have just taken apart injector 4 and found that the spring had become stuck and almost fused, which would indicate that this injector has been sticking open as it has been unable to return to the closed position with the siezed spring.
Also the bottom of the injector piston is well worn and the rubber o-ring has almost disappeared.
Where can I get a set of 3 injectors?

[Lazydocker]

Just spoken to an lpg installer and he suggested that the problem is more likely to be an injector than a leaky pipe.
Can the injectors be serviced? If not is it possible to buy the stag-300 injectors seperately somewhere?

Yep, injectors are readily available in banks of 3
I wouldn't start replacing stuff willy-nilly though

I have just taken apart injector 4 and found that the spring had become stuck and almost fused, which would indicate that this injector has been sticking open as it has been unable to return to the closed position with the siezed spring.
Also the bottom of the injector piston is well worn and the rubber o-ring has almost disappeared.
Where can I get a set of 3 injectors?

PM sent mate

[megaomega123]

Recieved and replied  

[Kevin Wood]

just a couple of small points,the lpg nozzles on that setup must be huge as the lpg times are smaller than the petrol ones,ie way to big.secondly the lnjector  times are way different between the banks which on a car i recently played with meant the lambda sensors were cross linked(gotta thank the forum for that one i was totally stumped)

I wonder if the short injection times are a symptom of having been recalibrated with leaky injectors? It had 2.5mm nozzles when we converted it, IIRC. Vapour pressure is a little high but not enough to drive the injection times down that low.

Kevin

[megaomega123]

Quick update. I have spoken to Teilo and he is sending me 6 new injectors under warranty  

Very pleased about this. I am also pleased that I have learnt a lot about the LPG setup and the injectors. I have managed to get it running not too badly. The seat of the injector valve had mushroomed from where it has been banging on the bottom of the carrier. I chamferred the bottom of it and slackened the adjuster slightly, to prevent it knocking on the bottom so much. The idle is a bit iffy but it is running smoothly, until my new injectors arrive.

Thanks to Paul and Kevin for their help on this matter. I am happy to have gained a better insight into the functions of some of these components.  

[Kevin Wood]

It's good to know Teilo is standing by the 2 year (IIRC) warranty on these kits.

Bear in mind that it will probably need calibrating again with the new injectors on it.

Check also that they are the same impedance. This was one of the early kits that had 1 ohm injectors IIRC. Most recently-supplied kits have 3 ohm injectors (red body on the coil instead of yellow, but double check what's written on them!). If they are 3 ohm injectors you need to set the ECU up accordingly.

Finally, if the injectors come with the brass outlet nozzles installed, swap them for the ones already on the car as they won't have been drilled.

Kevin

[megaomega123]

I have been informed that I am getting the 3ohm ones so will change setting and recalibrate.
I am not sure what you mean by the brass outlet nozzles? Could you describe them and say where they are drilled please?  

[Kevin Wood]

I have been informed that I am getting the 3ohm ones so will change setting and recalibrate.
I am not sure what you mean by the brass outlet nozzles? Could you describe them and say where they are drilled please?  

The nozzles (3 per block) screw into the opposite side of the injector block to the red / yellow coils. They are what the small rubber tubes to the injectors are connected to.

Injectors are supplied with nozzles containing very small diameter holes and the idea is that you drill them out to suit the fuel demands of the engine you are converting. You therefore need to unscrew the nozzles from your old injectors and fit them to the new ones.

Kevin

[megaomega123]

I see what you mean now. I had planned on changing just the injectors. Ill wait until I am back at college next week and drill the new ones to the same spec as the existing ones and keep them as spares.

Thanks again. Ill let you know how it all goes  

[megaomega123]

Got the new 3ohm injectors on Friday morning. Took only 40 minutes to swap them and reconfigure the ecu. The car is now running perfectly on gas.
It made me realise just how bad it has been and how much it's been costing me in gas. All is now perfect.
Many thanks to Kevin and Paul once again and I must say that Teilo at motogas is a very good person to deal with. All in all a great result  

[Kevin Wood]

Excellent result Glad to hear it's sorted.

You don't happen to know how many miles it did on those injectors, do you? Trying to remember how many it had done when we converted it.

Just wondering how long they can be expected to last?

Havign said that, I wonder if he went over to the 3 ohm ones due to problems with the 1 ohms?

Kevin