[ROVERNET - UK] Calling Rovernet Brain trust!!!
slatskars at comcast.net
Thu Sep 28 23:19:53 BST 2006
Did you check the oil level in the carb? It needs the resistance in order to
function as an accelerator pump. Starting and running fine at idle, but
backfiring through the carb on acceleration is an old symptom of a bad
condenser (capacitor). You might try replacing just that or going back to
I agree with Paul about the SU fuel pumps. I just fired my P-5 off today
after a couple of years and discovered that the main is not working, but the
reserve is. I will pull it and rebuild both sections soon. They are really
pretty simple and again, I agree with Paul regarding the diode across the
coil. It does make the points last longer. Unless the coils are bad in the
fuel pumps, there is no reason to replace them. They can easily be rebuilt
(points, diaphragm and diode) many times. You can test them by just
connecting them directly to a battery (watch the polarity, particularly with
a diode installed).
----- Original Message -----
From: "Ben Rodgers" <irishrover at netscape.ca>
To: <rovernet at lyris.ccdata.com>
Sent: Thursday, September 28, 2006 11:07 AM
Subject: Re: [ROVERNET - UK] Calling Rovernet Brain trust!!!
> Hi Guys
> I need help! The Rover has me stumped (1967 P5 Mk3 Std )
> The car starts and idles okay with full choke on , but once underway I can
> hardly get out of second gear and continue to need choke. When I rev it
> struggles and coughs back thru carb, and the engine dies, that indicates a
> weak mixture, its also running on the hot side. At first it appeared to be
> the mixture, too rich because of choke but I really believe its too much
> air, (it coughs thru the carb). I have checked the carb, gas lines, air
> connections etc, nothing obviously wrong. I decided it was not getting
> enough gas and as everything checked out in the engine bay. I started at
> source, the gas tank, removed cleaned and sealed inside, replaced the dual
> Lucas pumps with a single after market pump supplied by Ruth at ABC. Took
> the car for a drive of about four miles it worked fair but not just right.
> Stopped to filled up with gas then tried to start the car for return
> journey, would barely idle and stalled when I tried to move. I noticed
> the distributor was very hot, heat shield wasn't quite in place (now
> corrected). I waited while everything cooled and managed to drive home
> gently. Next I decided the petronix unit was cooked so replaced with
> no improvement, still started easy and idled but no revs. I decided next
> coil, the wire was a bit green so replaced that, no improvement. I have to
> date done the following - cleaned gas tank. replaced fuel pump. checked
> everything from tank to engine (several times) checked carb float level,
> checked all air connections. check coil and changed coil wire. cleaned and
> re-gapped plugs. checked bolts on intake manifold. played with carb
> and air screw. I'm stumped, the problem seems to be that the engine is
> running too weak, getting too much air, but where from. What else could it
> be??. What am I missing here???? I need the help of the Rovernet Brain
> on this one please please please.
> Regards Ben
> Sitting in my
> coracle stumped!
> I have replaced the exhaust valves and had cylinder head cleaned and
> approx two years ago, not many miles on car since.
> FREDERICK (BEN) RODGERS
> born in Belfast, Northern Ireland,
> Author of "lily and me" a great book and a great read .
> Order on line at amazon.com. Book # ISBN1-55430-019-3
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