|
Author |
Message |
Jason
Joined: 12 Nov 2008 Posts: 623 Location: Todmorden, Lancs.
|
Posted: Sat Sep 29, 2012 10:51 am Post subject: running issue |
|
|
I took the Alvis out for a run the other day and its running perfect with plenty of power.
I got on an open bit of road and gave her some 'beans' and when I got above 45mph, the engine tried to die.... then if I drop below 45mph its fine again.
there's no backfiring and has loads of power at slow speeds.
I'm guessing its fuel starvation at high revs and hoping its something simple like a blocked jet in the carb, but could do with a second opinion before I start stripping the carb down.
thanks in advance
jason _________________ "people with money buy a Rolls Royce, people with taste buy an Alvis". |
|
Back to top |
|
|
Penman
Joined: 23 Nov 2007 Posts: 4755 Location: Swindon, Wilts.
|
Posted: Sat Sep 29, 2012 11:36 am Post subject: |
|
|
Hi
Does it do the same thing in lower gears at the same revs?
Older cars wouldn't have electronics that changed settings relative to gear so the symptoms should show relative to revs. _________________ Bristols should always come in pairs.
Any 2 from:-
Straight 6
V8 V10 |
|
Back to top |
|
|
Jason
Joined: 12 Nov 2008 Posts: 623 Location: Todmorden, Lancs.
|
Posted: Sat Sep 29, 2012 11:41 am Post subject: |
|
|
mmmm.....not tried that mate, I'll fire her up and check.
cheers
jason _________________ "people with money buy a Rolls Royce, people with taste buy an Alvis". |
|
Back to top |
|
|
welshrover
Joined: 09 Aug 2011 Posts: 326
|
Posted: Sat Sep 29, 2012 4:27 pm Post subject: |
|
|
i had a similar problem with my wifes hillman. the main jet in the carb was partially blocked .it was ok slow, then up the revs and it would start to struggle like you said .but only under load, when it was revved at idle it didnt show as a problem .
probably just needs a shilling tune up. |
|
Back to top |
|
|
47p2
Joined: 24 Nov 2007 Posts: 2009 Location: Glasgow
|
Posted: Sat Sep 29, 2012 5:08 pm Post subject: |
|
|
Sounds like a fuel issue, what make of carb is on the car? _________________ ROVER
One of Britain's Fine Cars |
|
Back to top |
|
|
Jason
Joined: 12 Nov 2008 Posts: 623 Location: Todmorden, Lancs.
|
Posted: Sat Sep 29, 2012 9:14 pm Post subject: |
|
|
I've had her running this afternoon and she does seem to die if given a lot of throttle (high revs).
I think I'll strip the carb tomorrow and give it a good clean out.
it's an SU H4 carb and to be honest, I've not touched it since rebuilding it about 4 years since.....so probably just needs a clean out.
I'll report back tomorrow after I've had a play
jason _________________ "people with money buy a Rolls Royce, people with taste buy an Alvis". |
|
Back to top |
|
|
MVPeters
Joined: 28 Aug 2008 Posts: 822 Location: Northern MA, USA
|
Posted: Sat Sep 29, 2012 10:47 pm Post subject: |
|
|
Using the rule "Do the easy bits first", I'd check the fuel filter &/or pump. _________________ Mike - MVPeters at comcast.net
2002 MINI Cooper 'S' |
|
Back to top |
|
|
Penman
Joined: 23 Nov 2007 Posts: 4755 Location: Swindon, Wilts.
|
Posted: Sat Sep 29, 2012 11:23 pm Post subject: |
|
|
Hi
Don't forget it is also possible for the spark to break down under load. _________________ Bristols should always come in pairs.
Any 2 from:-
Straight 6
V8 V10 |
|
Back to top |
|
|
Jason
Joined: 12 Nov 2008 Posts: 623 Location: Todmorden, Lancs.
|
Posted: Sun Sep 30, 2012 3:53 pm Post subject: |
|
|
this morning I cleaned out the glass bowl filter and the small brass filter in the fuel pump, there was no visible dirt in either but the car seems fine now.
I've done about 5 miles this afternoon and she run perfect, so I've no idea what it was. _________________ "people with money buy a Rolls Royce, people with taste buy an Alvis". |
|
Back to top |
|
|
trampintransit
Joined: 09 Aug 2010 Posts: 166 Location: Edinburgh
|
Posted: Tue Dec 11, 2012 7:01 pm Post subject: |
|
|
Brilliant....that's the kind of fix we like~ |
|
Back to top |
|
|
|