[Mgs] Bad Fuel Question

Tue Jul 23 14:18:31 MDT 2019

Thanks, Simon. That’s good to know.

DFD

From: Mgs [mailto:mgs-bounces at autox.team.net] On Behalf Of Simon Matthews via Mgs
Sent: Tuesday, July 23, 2019 1:39 PM
To: Max Heim
Cc: MGS
Subject: Re: [Mgs] Bad Fuel Question

Condencers can fail in two ways, open and closed. If they fail closed (shorted), you are not going anywhere, but if they fail open (infinite capacitance), much of the energy in the spark can be lost through arcing across the points, leading to rough running.

Simon

On Tue, Jul 23, 2019, 9:03 AM Max Heim via Mgs <mgs at autox.team.net> wrote:

I understand how it could make the car inoperable. I don’t see an explanation for an intermediate state.

--

Max Heim

mvheim at sonic.net

On Jul 23, 2019, at 6:53 AM, Charley Robinson <Charley38 at twc.com> wrote:

Not true, Max.  When the points open, the condenser discharges through the coil in order to perpetuate the spark.  Without the condenser the engine may not even start.  Try it some time. :-)

CR

On 7/22/2019 1:18 PM, Max Heim via Mgs wrote:

How do bad condensers cause rough running? All they do is prevent the points from burning. Oh, you are saying the points are burnt. 

--

Max Heim

'66 MGB

On Jul 22, 2019, at 11:10 AM, i erbs via Mgs <mgs at autox.team.net> wrote:

could also be a bad a condenser. Could coincidental, not causational. How old is the condenser? Even if newish, there are lots of crappy new Lucas parts out there. I had three bad ones with similar results, until replaced with  a Distributor Doctor HD condenser.

Ira Erbs 

Portland,OR

      _______                                  _______
     (______ \____1959 BN4____/ _______)
         (_________________________)

          BT7 engine and disk brakes

1967 MGB  Description: Image removed by sender. MG

A racing car is an animal with a thousand adjustments. Mario Andretti

Please excuse random auto corrects and misspelled words

On Mon, Jul 22, 2019 at 10:36 AM David Breneman via Mgs <mgs at autox.team.net> wrote:

I've never encountered a "bad fuel" problem before, so I'm looking

for some confirmation (or not).  The local Mom-without-Pop store put

in new pumps, and one of the things they're offering now is 92 octane (US)

alcohol-free gas.  I had about a quarter tank in my MGA (w/MGB high

compression engine) so I went to fill up.  The pump with the alcohol-

free gas was out of order!  So I put in three gallons of regular 92 

octane, and about 1/4 mile from the station started experiencing a lot

of misfiring, mostly when accelerating in 3rd and 4th.  I continued

driving like this for about 20 miles to see if it would clear up and it

never did.  I can't imagine it's anything but the fuel, but I've never

encountered "bad fuel" situation like this in 44 years of driving.

The fact that it started about 1/4 mile after leaving the station seems

like pretty good evidence.  Any other possibilities?  Is there any option

other than to just burn through this half tank of gas?

Thanks!  

David Breneman  david_breneman at yahoo.com

_______________________________________________

Mgs at autox.team.net
Donate: http://www.team.net/donate.html
Suggested annual donation  $12.75

Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive

Unsubscribe: http://autox.team.net/mailman/options/mgs/eyera3000@gmail.com

_______________________________________________

 <mailto:Mgs at autox.team.net> Mgs at autox.team.net
Donate:  <http://www.team.net/donate.html> http://www.team.net/donate.html
Suggested annual donation  $12.75

Archive:  <http://www.team.net/pipermail/mgs> http://www.team.net/pipermail/mgs  <http://autox.team.net/archive> http://autox.team.net/archive

Unsubscribe:  <http://autox.team.net/mailman/options/mgs/mvheim@sonic.net> http://autox.team.net/mailman/options/mgs/mvheim@sonic.net

_______________________________________________

Mgs at autox.team.net
Donate: http://www.team.net/donate.html
Suggested annual donation  $12.75

Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive

Unsubscribe: http://autox.team.net/mailman/options/mgs/charley38@twc.com

_______________________________________________

Mgs at autox.team.net
Donate: http://www.team.net/donate.html
Suggested annual donation  $12.75

Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive

Unsubscribe: http://autox.team.net/mailman/options/mgs/simon.d.matthews@gmail.com

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/mgs/attachments/20190723/e95936d7/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: ~WRD000.jpg
Type: image/jpeg
Size: 823 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/mgs/attachments/20190723/e95936d7/attachment.jpg>