I thought so and looking at the list of cars you've got there you'd probably be the one to know!
At the moment it uses a lot more. So I want to get it sorted asap so I can enjoy running the engine in
Fueling too rich, 2.5 Pi
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KieranEbbett2500
- Groupie
- Posts: 30
- Joined: Sat Sep 19, 2015 11:42 pm
Re: Fueling too rich, 2.5 Pi
O.K. I'm in Wairoa but won't be any help to you.
We have a Club based in Hastings. Hawke's Bay British and European Car Club. Google it and have a look. We have a lot of Triumph members. Steven Tidswell our Club Captain is an ex Triumph mechanic and has a lot of knowledge. May pay to contact him direct rather than go through party.
Tony.
We have a Club based in Hastings. Hawke's Bay British and European Car Club. Google it and have a look. We have a lot of Triumph members. Steven Tidswell our Club Captain is an ex Triumph mechanic and has a lot of knowledge. May pay to contact him direct rather than go through party.
Tony.
Last edited by tony on Thu Jan 05, 2017 3:29 am, edited 1 time in total.
1976 2500 TC. converted to S specs.
Lots of bits
1999 BMW Z3.
2006 BMW 325ti.
Hopefully not needing too many bits.
.
Lots of bits
1999 BMW Z3.
2006 BMW 325ti.
Hopefully not needing too many bits.
.
Re: Fueling too rich, 2.5 Pi
I see Steven is not on the contact list, but email Sue.
Tony.
Tony.
1976 2500 TC. converted to S specs.
Lots of bits
1999 BMW Z3.
2006 BMW 325ti.
Hopefully not needing too many bits.
.
Lots of bits
1999 BMW Z3.
2006 BMW 325ti.
Hopefully not needing too many bits.
.
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KieranEbbett2500
- Groupie
- Posts: 30
- Joined: Sat Sep 19, 2015 11:42 pm
Re: Fueling too rich, 2.5 Pi
Have sent an email to Sue.
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KieranEbbett2500
- Groupie
- Posts: 30
- Joined: Sat Sep 19, 2015 11:42 pm
Re: Fueling too rich, 2.5 Pi
Spoke on the phone to him.
As I expected there wasn't a lot he could do without any test equipment for vacuum and fuel pressure etc. But he's gonna have a ring around and see what he can come up with.
As I expected there wasn't a lot he could do without any test equipment for vacuum and fuel pressure etc. But he's gonna have a ring around and see what he can come up with.
Re: Fueling too rich, 2.5 Pi
Hello Kieran,
"I've tried a few things but it all still points to fueling issue."
A Lucas P.I. will always run rich if the engine is not 100%, anything that affects the manifold vacuum so that it is lower than it should be gives a richer mixture.
If you are sure the engine is 100% then the metering unit can be removed and sent to someone with the right equipment to check the calibration.
Alec
"I've tried a few things but it all still points to fueling issue."
A Lucas P.I. will always run rich if the engine is not 100%, anything that affects the manifold vacuum so that it is lower than it should be gives a richer mixture.
If you are sure the engine is 100% then the metering unit can be removed and sent to someone with the right equipment to check the calibration.
Alec
0465
MK1.5 2.5 P.I.
Jaguar MK 2 (Long term restoration, nearing completion.)
MK1.5 2.5 P.I.
Jaguar MK 2 (Long term restoration, nearing completion.)
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KieranEbbett2500
- Groupie
- Posts: 30
- Joined: Sat Sep 19, 2015 11:42 pm
Re: Fueling too rich, 2.5 Pi
A bit of an update.
I removed the air cleaner to look at the butterfly synchronization and discovered they weren't quite right. The rear most two weren't opening until about 1500 rpm (which would explain the hesitant running below that engine speed) and the middle two weren't quite closing at idle. Which explained why it would idle with the air bleed screw wound in. It is a large amount better but is still running richer than I would imagine it's supposed to. I'll. Try and get a hold of a vacuum gauge and one to test the fuel pressure once all of the mechanic shops reopen next week. A fellow in town apparently has all the tooling from the Triumph agent that was there many years ago. So hopefully I'll have a bit of luck with it
I removed the air cleaner to look at the butterfly synchronization and discovered they weren't quite right. The rear most two weren't opening until about 1500 rpm (which would explain the hesitant running below that engine speed) and the middle two weren't quite closing at idle. Which explained why it would idle with the air bleed screw wound in. It is a large amount better but is still running richer than I would imagine it's supposed to. I'll. Try and get a hold of a vacuum gauge and one to test the fuel pressure once all of the mechanic shops reopen next week. A fellow in town apparently has all the tooling from the Triumph agent that was there many years ago. So hopefully I'll have a bit of luck with it
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Mike Stevens
- Site Admin
- Posts: 3649
- Joined: Mon May 08, 2006 9:50 pm
- Location: South Oxfordshire, UK
Re: Fueling too rich, 2.5 Pi
If I remember correctly, the MU signal comes from the middle pair of inlets, so if that pair aren't closing properly, the MU is likely to see a lower that normal 'vacuum'. (Strictly speaking it's 'manifold depression' rather than 'vacuum', but the latter is quicker and easier to type!).
In my experience, the PI system can be be made to run very well indeed, but the condition of the engine, and it's setting-up (adjustments, timings etc) are far more important than with a carb engine.
It sounds like you are nearly getting there!
Cheers,
Mike.
In my experience, the PI system can be be made to run very well indeed, but the condition of the engine, and it's setting-up (adjustments, timings etc) are far more important than with a carb engine.
It sounds like you are nearly getting there!
Cheers,
Mike.
(South Oxfordshire)
Register Member No 0355
1971 2.5PI Saloon Sapphire blue
1973 2.5PI Saloon rust some Honeysuckle
1973 Stag French blue
(1949 LandRover which is now back to its original light green!)
Register Member No 0355
1971 2.5PI Saloon Sapphire blue
1973 2.5PI Saloon rust some Honeysuckle
1973 Stag French blue
(1949 LandRover which is now back to its original light green!)
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KieranEbbett2500
- Groupie
- Posts: 30
- Joined: Sat Sep 19, 2015 11:42 pm
Re: Fueling too rich, 2.5 Pi
Since my last post ive retorqued the head down and readjusted the valve clearences.
The car is going well now with just more than 600kms since the rebuild.
Im pretty much stuck with progress on it until i pay the machine shop for thier work.
I really am on the lookout for test gauges and knowledge of somebody in New Zealand who can reset my metering unit.
The car is going well now with just more than 600kms since the rebuild.
Im pretty much stuck with progress on it until i pay the machine shop for thier work.
I really am on the lookout for test gauges and knowledge of somebody in New Zealand who can reset my metering unit.
Re: Fueling too rich, 2.5 Pi
Hello Kieran,
you can buy pressure gauges and vacuum gauges from industrial sources, something like a 0 - 150 psi pressure gauge, preferably silicone damped, but that is not essential and a reasoanbly large diameter vacuum gauge. You will then need a suitable short high pressure hose with eth correct fittings. Try a hose replacement service that produce hoses for hydraulic devices, e.g. diggers etc.
Alec
you can buy pressure gauges and vacuum gauges from industrial sources, something like a 0 - 150 psi pressure gauge, preferably silicone damped, but that is not essential and a reasoanbly large diameter vacuum gauge. You will then need a suitable short high pressure hose with eth correct fittings. Try a hose replacement service that produce hoses for hydraulic devices, e.g. diggers etc.
Alec
0465
MK1.5 2.5 P.I.
Jaguar MK 2 (Long term restoration, nearing completion.)
MK1.5 2.5 P.I.
Jaguar MK 2 (Long term restoration, nearing completion.)