|
|
Post by indianajones on Apr 29, 2012 9:01:09 GMT
Hey David,
I think I managed to sort the choke issue out, the fast idle screw isn't in far enough as you suggested. Turned it in a bit more and seemed to have got things sorted. Will keep my eye on it of course.
Re the banging and popping, she had never really done this before (save the time I bought her back and she had been sitting for around 6 months) until I rebuilt my carb and tuned it.
I put it down to my crappy tuning skills lol, I lifted the pin a bit more the last time I did it and the RPMs dropped off very quickly, she most of been too lean. Enriched her a bit more, she's ever so slightly rich now and haven't had the issue again since. Fingers cross it was just the carb.
-Andrew
|
|
|
|
Post by indianajones on May 5, 2012 6:20:18 GMT
Well got one or two pops on the way to the shops this afternoon, I'll have to check the timing and perhaps retard it a little. I have been running 95 RON as opposed to 91 lately so that may of had some effect.
-Andrew
|
|
|
|
Post by Penguin45 on May 7, 2012 23:31:11 GMT
Mine generally runs on standard unleaded. Last year, I filled her up with some Super for a run to a show and she ran like an absolute nail. Coughing and spluttering, very bad idle. I tweaked the timing at the show in order to get home, but went back to to standard unleaded as soon as the tank ran low. It's probably complete rubbish, but I suspect cars get used to a particular grade of fuel and don't like change much.
Chris.
|
|
|
|
Post by indianajones on May 9, 2012 5:35:18 GMT
Cheers for that Chris. I took her for another drive the other day and she seemed fine. I'll go back to 91 and see what happens  In other news I may have sourced a Wolseley 6/110 for my elopement -Andrew |
|
|
|
Post by indianajones on May 15, 2012 5:24:41 GMT
Hmmm just read this:
"Telltale signs of worn out timing chains are:
-Rough idle.
-Sluggish performance and poor economy.
-Sudden engine performance change including the inability to start the engine.
-Intermittent backfire through the intake manifold.
-Inconsistent ignition timing or a clattering noise coming from the front of the engine. "
My idle is kinda funny, just seems to wobble a bit and sometimes it can be a bit rough.
Not too sure about the rest. Acording to my Haynes manaul the timing chain can be done in place, which is handy.
I doubt it's the timing chain (I hope), was just a little bored!
-Andrew
|
|
|
|
Post by dave1800 on May 15, 2012 8:06:46 GMT
Your engine probably has duplex timing chains (unless it is a Mk111) and I have never had a problem even afer twice round the clock. Is your timing jittery (disconnect and block the vacuum advance befotre you check). I would put this down at number 49 out of 50 possible causes, but of course I may be wrong! No harm in having a look if you want to get dirty and familarise yourself, the tensioner could be on its way out I guess. Regards David Yes you can do it in situ, read Tommy's threads Hmmm just read this: "Telltale signs of worn out timing chains are: -Rough idle. -Sluggish performance and poor economy. -Sudden engine performance change including the inability to start the engine. -Intermittent backfire through the intake manifold. -Inconsistent ignition timing or a clattering noise coming from the front of the engine. " My idle is kinda funny, just seems to wobble a bit and sometimes it can be a bit rough. Not too sure about the rest. Acording to my Haynes manaul the timing chain can be done in place, which is handy. I doubt it's the timing chain (I hope), was just a little bored! -Andrew |
|
|
|
Post by indianajones on May 21, 2012 7:19:25 GMT
Well it's winter (or going on) here in NZ and poor Wendy doesn't like to start in the cold. I swear the carb/choke set up is right, but when I put on say 8mm of choke, so just upping the idle and not enriching her, she sits on about 800 rpm and kinda goes "braaaap.....braaaap" like a puffing train, a bit of smoke out the back, if I pull the knob all the way out it just ends up stalling/killing her. Here's a video: Any ideas? Once she's warm etc she seems sweet, so I donno really. Sorry I've asked this before, but it's doing my head in a bit  In other news I've been given the contact details of an old BMC man who has lots of NOS and will see if he has anything that I might need/want. Otherwise sadly I've been a bit too busy with work, tech and sleeping to get much done on the car lately. Cheers, -Andrew |
|
|
|
Post by dave1800 on May 21, 2012 9:12:45 GMT
Andrew Obviously difficult to diagnose properly from afar, but it sounds as though as soon as you lower the jet with the choke cable that there is too much petrol running in. On the video it sounds much, much too rich. Have you checked the float chamber to ensure that the float hasn't got a hole in it and that the float valve is closing fully, no dirt in the valve or a lot of wear? When you pull out the choke a little the engine rpm should rise to around 1000-1100 rpm. Tommy described how to set the gap correctly on the choke mechanism so that the revs rise correctly before the jet actually starts moving down. Also check the ignition timing, it can cause odd effects on cold engine starting. Regards David Well it's winter (or going on) here in NZ and poor Wendy doesn't like to start in the cold. I swear the carb/choke set up is right, but when I put on say 8mm of choke, so just upping the idle and not enriching her, she sits on about 800 rpm and kinda goes "braaaap.....braaaap" like a puffing train, a bit of smoke out the back, if I pull the knob all the way out it just ends up stalling/killing her. Here's a video: Any ideas? Once she's warm etc she seems sweet, so I donno really. Sorry I've asked this before, but it's doing my head in a bit In other news I've been given the contact details of an old BMC man who has lots of NOS and will see if he has anything that I might need/want. Otherwise sadly I've been a bit too busy with work, tech and sleeping to get much done on the car lately. Cheers, -Andrew |
|
|
|
Post by indianajones on May 28, 2012 7:15:54 GMT
Well I checked the float and bowl and seems fine. The choke set up seems ok, the choke opens up a bit before actually lowering the jet (i.e. just upping the revs). But still when she's cold she seems very iffy. I seem to keep gonig from too rich to too lean it seems lol. I won't want to give in and go to a mechanic just yet though! Hopefully I get it sorted soon, otherwise I'm having 2 weeks off in July after my exams to look into it more Thanks again everyone, the advice is awesome -Andrew -Andrew |
|
|
|
Post by tommydp on May 28, 2012 20:52:30 GMT
Well I checked the float and bowl and seems fine. The choke set up seems ok, the choke opens up a bit before actually lowering the jet (i.e. just upping the revs). But still when she's cold she seems very iffy. I seem to keep gonig from too rich to too lean it seems lol. I won't want to give in and go to a mechanic just yet though! Hopefully I get it sorted soon, otherwise I'm having 2 weeks off in July after my exams to look into it more Thanks again everyone, the advice is awesome -Andrew -Andrew Hi Andrew! It sure seems to run too rich, judging by the smoke and sound in the video. If it runs fine when hot, I can only imagine it's down to a too slow fast idle. What's the gap between the fast idle screw and the choke lever/ cam like? The gap should be just visible when the choke handle is fully in. 800 rpm when the choke is apllied so it's just ABOUT TO move the jet down is too slow. It's supposed to be 1000- 1100. What's the idle speed like when hot? How about uploading a movie when it's idling fully warm? Would be easier to diagnose then. Are you sure the piston falls freely and is not sticking? If you look down the jet, can you see the petrol level just below the top of the jet? Does it fire and start quite instantly both cold and hot? It's supposed to, even in minus 25 degrees Celsius! Yes it's true! Good luck! I'm sure you'll be able to solve this! Some more videos could be of great help. Regards, Tommy |
|
|
|
Post by indianajones on May 28, 2012 22:26:24 GMT
Queen's birthday weekend coming up so what I'll do is check my plugs again (I checked them on the weekend and they were very black so cleaned them up etc) get her warm, tune her and go for a nice 10-15km trip and then check the plugs and mixture etc. Will take the ipod to make some films. Watch this space  -Andrew |
|
|
|
Post by Penguin45 on May 29, 2012 0:29:09 GMT
Black is rich, Indy. 2 + 3 are usually worse as they scavenge more, being a siamesed port. Bear in mind what has been said about the pintle or lifting pin on the carb. When raised, the revs should rise and then fall back to the original setting when it's just right.
With the choke fully closed, there should be a tiny gap between the choke setting screw and the cam. This ensures that the choke is fully off.
Ease up the jet nut one flat at a time and see how you go.
Chris.
|
|
|
|
Post by indianajones on May 29, 2012 5:22:55 GMT
When lifting the pin, sometimes it's really obvious if it's too rich or lean, but when you get closer to the proper mixture it's pretty hard to tell any difference in the engine note. I've never managed to get it to go up slightly and back to normal as what you've said Chris and the manuals
-Andrew
|
|
|
|
Post by tommydp on May 29, 2012 12:47:12 GMT
When lifting the pin, sometimes it's really obvious if it's too rich or lean, but when you get closer to the proper mixture it's pretty hard to tell any difference in the engine note. I've never managed to get it to go up slightly and back to normal as what you've said Chris and the manuals -Andrew I have difficulties getting good results with the lifting pin, too. It varies at the same setting. I wonder if it's down to modern fuel, as I had no problem adjusting by using the lifting pin as long as we had leaded fuel... And yes, I have the same experience on different cars, also well functioning. I now adjust the mixture to the point where it gives the highest possible idle speed with even running. I then check the plugs after a good run, looking for the correct brown/ grey colour. Also you'll feel if it's too weak on the road as it will hesitate and improve when you pull the choke out. If you can push the choke in almost instantly and drive away from cold, it's most likely too rich.. Regards, T |
|
|
|
Post by indianajones on Jun 5, 2012 0:35:46 GMT
Righto,
Sorry for the lack of video I forgot my damn Ipod before I left!
I cleaned the plugs, again! and then set the fast idle up, she started and went up to 1000-1100 RPM as she should, and didn't sound too rich. Once warmed up and upped the idle to and double checked my mixture before heading off. Got the idle high and even as Tommy has suggested, also used the lifting pin.
Took her on a 133km round trip (went to visit a mate who lives out of town), she seemed fine and purred along nicely.
Once I let her cooled down we inspected the 1st and 3rd plugs, black on the ring outside, but the electrode was still fine, so we agreed it looked a bit rich so I enriched her a bit more.
She seemed just as happy on the way back and checked the plugs again the next day and we still looking good, Not quite brown yet, but not black in the middle _b.
Hopefully this is it sorted as I need her for my full licence test later this month!
Thanks again everyone! must try and write up an article for the crab mag during my break from tech.
-Andrew
|
|
