Search found 8494 matches

by Gilbertd
Mon Jan 18, 2021 5:06 pm
Forum: General Discussion
Topic: high pressure during cut off
Replies: 45
Views: 1648

Re: high pressure during cut off

If petrol long term trims are that far out, it's running lean on petrol. I would suspect an air leak in the intake somewhere.
by Gilbertd
Mon Jan 18, 2021 10:35 am
Forum: General Discussion
Topic: injector cleaner
Replies: 6
Views: 39

Re: injector cleaner

I assume it has an idle air valve to keep the idle speed steady? If it does and it's a bit sticky that can cause poor idle.
by Gilbertd
Mon Jan 11, 2021 10:54 am
Forum: General Discussion
Topic: Engineering company suggestions for hard valves/seats
Replies: 54
Views: 701

Re: Engineering company suggestions for hard valves/seats

Re one piece tappets - that makes for a very high maintenance engine. Or one where they don't expect you to do any maintenance, just throw it away when it starts to wear out. Re Acetone, I read somewhere that a 50:50 mix of Acetone and ATF works better than Plus Gas on seized bolts and mentioned th...
by Gilbertd
Sat Jan 09, 2021 7:46 pm
Forum: General Discussion
Topic: Engineering company suggestions for hard valves/seats
Replies: 54
Views: 701

Re: Engineering company suggestions for hard valves/seats

Not easy to get hold of but if you can find a LH thread tap and bolt, that might be better than an Easy out.
by Gilbertd
Mon Jan 04, 2021 10:22 pm
Forum: General Discussion
Topic: Engineering company suggestions for hard valves/seats
Replies: 54
Views: 701

Re: Engineering company suggestions for hard valves/seats

Thanks for the comments guys. It may be possible to do what's been suggested but I believe I need the timing cover off to do that, which involves taking all the accessory drives and brackets etc off the front of the engine. Definitely doable, but not a simple job Doesn't it have a plug or something...
by Gilbertd
Mon Jan 04, 2021 1:34 pm
Forum: General Discussion
Topic: Engineering company suggestions for hard valves/seats
Replies: 54
Views: 701

Re: Engineering company suggestions for hard valves/seats

I couldn't work out from your pics which was inlet cam and which was the exhaust. I figured it looked to be the one with the main timing chain on it but your pic of the tappet push down thingy seemed to show it as being the one driven by the single chain. I would assume that main chain has a tension...
by Gilbertd
Mon Jan 04, 2021 1:30 am
Forum: General Discussion
Topic: Engineering company suggestions for hard valves/seats
Replies: 54
Views: 701

Re: Engineering company suggestions for hard valves/seats

May be a silly question as I've never worked on one of these engines, but is it possible to slacken off the cam bearing caps so it can be lifted a touch to allow you to remove the shim? Could you get away, even in the short term, with fitting a thinner shim to get the gap back?
by Gilbertd
Fri Jan 01, 2021 10:39 am
Forum: General Discussion
Topic: Engineering company suggestions for hard valves/seats
Replies: 54
Views: 701

Re: Engineering company suggestions for hard valves/seats

Not the same one then. A member on rangerovers.pub, a P38 forum, has recently picked up a 4.2SC L322 at a very good price due to a misfire which he suspects is down to VSR. I've had hardened valve seats fitted in the past (on a different engine) by a local engine reconditioners (Lyndale Engines in P...
by Gilbertd
Sun Dec 06, 2020 2:06 pm
Forum: General Discussion
Topic: Brim to brim...
Replies: 80
Views: 4433

Re: Brim to brim...

R290 doesn't have the smelly stuff in it and no moisture or lubricant so is must better quality than what we get from the forecourt pumps. All refrigerants do the same job so they all have very similar characteristics. I did my AC FGas course a few months ago and knowledge of how the LPG system on a...
by Gilbertd
Sat Dec 05, 2020 6:20 pm
Forum: General Discussion
Topic: Brim to brim...
Replies: 80
Views: 4433

Re: Brim to brim...

Could do the maths but some AC systems use propane as refrigerant If you look at your fridge and see that it is using R290 refrigerant, that's Propane and is quite common. Others use R600A which is isoButane. Refrigerant pressure varies with temperature but at an ambient of 25 degrees C the compres...
by Gilbertd
Wed Dec 02, 2020 1:54 am
Forum: Running a V8 on LPG
Topic: Advice please!
Replies: 344
Views: 18011

Re: Advice please!

It won't affect the AEB as it will still be seeing the same signal as it was before. Difference is that the lambda sensor signal to the GM ECU will be going direct and not via the AEB controller. It should just pass it through but can sometimes mess with it and send a simulated signal (or you can ma...
by Gilbertd
Tue Dec 01, 2020 7:03 pm
Forum: Running a V8 on LPG
Topic: Advice please!
Replies: 344
Views: 18011

Re: Advice please!

It'll be branded Millennium and will have Millennium firmware but if you look at the circuit board, it's still an AEB175, so quite what the other pair of wires are doing is anyone's guess. Can you pull the boot on the plug back and see where the extra pair of wires are connected? Yes, reconnect as p...
by Gilbertd
Tue Dec 01, 2020 6:02 pm
Forum: Running a V8 on LPG
Topic: Advice please!
Replies: 344
Views: 18011

Re: Advice please!

Huh? Some of the multipoint systems for 5, 6 and 8 cylinder engines have a duplicate pair of lambda sensor wires so you get a pair with Purple and Grey and another pair with Purple/Black and Grey/Black but you wouldn't get this on a Leonardo as it is a controller for a single point system so there's...
by Gilbertd
Sat Nov 28, 2020 8:20 pm
Forum: General Discussion
Topic: LPG Reticulated System design.
Replies: 6
Views: 410

Re: LPG Reticulated System design.

You're probably asking in the wrong place as this forum is for people running motor vehicles on LPG. However, someone may have an answer for you. I would have thought the only thing you would need to take into account would be the size of the outlet and pipe from the tank so it can deliver sufficien...
by Gilbertd
Wed Nov 18, 2020 9:16 pm
Forum: General Discussion
Topic: high pressure during cut off
Replies: 45
Views: 1648

Re: high pressure during cut off

It isn't the side with the olive, it's the male to male threaded bit that is screwed into the elbow that appears to be cross threaded. It's probably easier to see on your picture than it is when looking down on it but there's far more thread showing on the lower one than the upper one.
by Gilbertd
Tue Nov 17, 2020 9:36 pm
Forum: General Discussion
Topic: high pressure during cut off
Replies: 45
Views: 1648

Re: high pressure during cut off

Looks to me like the bottom union is cross threaded so not screwing in fully. It looks to be at an angle and there's far more thread showing than on the top one. The connector you link to is for orange hose, vapour hose used to connect a Propane cylinder to your barbecue or patio heater. Intended fo...
by Gilbertd
Tue Nov 17, 2020 8:17 pm
Forum: General Discussion
Topic: high pressure during cut off
Replies: 45
Views: 1648

Re: high pressure during cut off

Reducer doesn't pump, it regulates the pressure down from the 10 bar or so that the liquid entering it is at. What Simon is saying is that with the valve closed there will still be some residual gas, in liquid state, in there which will vaporise and increase the pressure. A litre of liquid will beco...
by Gilbertd
Mon Nov 16, 2020 10:02 pm
Forum: General Discussion
Topic: high pressure during cut off
Replies: 45
Views: 1648

Re: high pressure during cut off

Some solenoid coils have a built in diode across the coil to stop any back emf from damaging the driver transistors in the controller, they will be marked + and - and must be connected the right way round (get it wrong and you'll blow the fuse). To check for leaks, a squirty bottle with a mix of was...
by Gilbertd
Mon Nov 09, 2020 9:51 am
Forum: General Discussion
Topic: Reducer question.
Replies: 5
Views: 427

Re: Reducer question.

Have a read of this http://www.turbominis.co.uk/forums/inde ... tid=378624. Robert came on here later in the project when he converted it to injection but his earlier version was a turbocharged engine with single point.
by Gilbertd
Sun Nov 08, 2020 6:19 pm
Forum: General Discussion
Topic: Reducer question.
Replies: 5
Views: 427

Re: Reducer question.

Yes, that's correct. If you were to use a mixer system on a forced induction engine, you'd have no suck when there was boost so no fuel going in.