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[Guest peter2b2002]

yesterday after fitting new spark plugs engine started up poor tick over till it warmed up after that tick over ok reved up to 5.5k with the odd cough out of the carb left it running for 1/2 hr no problem restarted ok, to day had to jump start (might needa new battery) thick over the same as yesterday but now get the odd back fire then when warmed up back fire cough cough back fire engine cuts out starts up ok then cough bang cough bang,taking the head off to see if the valves are ok

Peter2bz3

Edited April 26, 2015 by peter2b2002

[Guest 2b cruising]

It would pay you dividends if you can compression test first.

Going by the info given, you will probably find nothing wrong with h valves.

Sound more like ignition to me.

Timing slipped. Ignition feed or output intermittent.

Definitely along those or fuel starvation and then comes back to life momentarily.

HTH

Ken

[Guest peter2b2002]

Double checked timing, brand new dizy with points checked with timing light spot on fuel presure set to 2psi did try 3psi no change

Peter2b

[Guest Darren2010]

What has the carb come of? Have you checked the jetting? Could it be a fuelling issue?

[Guest peter2b2002]

it came off a 2ltr pinto

peter2b

[Guest peter2b2002]

I did notice that some times it back fire through the carb blue flame then back fires out of the exhaust

peter2b

[Guest Darren2010]

I had similar problems with mine. But I had flat spots and hesitation as well. A standard pinto has different exhaust and air filter and stuff. Just s thought.

[Guest 2b cruising]

Ignition problem.i am 99'/, sure.

Backfire followed by black smoke point to you getting fuel pumped through.

Ignition fires after turning over for a bit then fires and backfires through exhaust setting off the excess fuel pumped through to your exhaust.

Is there a part of your points shorting to earth. Were they fitted correctly by whoever built the dizzy.

Wish I was nearer.

Only other thing I can think of at the moment, is your float valve shutting off or are the plugs getting flooded because of float level to high.

Edited April 27, 2015 by 2b cruising

[Guest peter2b2002]

a chap at work had the same on his pinto turned out to be old fuel that he'd gummed up the float and jets as I got the carb off ebay I didn't think to give it a good clean up so I will give tst a try also as I got a spare points and cap I will fit those as well

petet2b

[Graham B]

Good luck Pete. Dirty/ gummed-up carb would be my guess too..

 

Sorry I wont be seeing you a Stoneleigh..always another year.

[Guest peter2b2002]

cheers Graham if you want to come up for tatton park show I have a spare room or a big field

peter2b

[sj-bradley]

Would a can of carb cleaner help clear this out?

[Guest peter2b2002]

Got 1and 1/2 cans so hopefully that will be enough

Peter2b

[Bob Tucker]

put the strobe light on each ht lead in turn &check for regular flashes to eliminate it being an intermittant ignition fault.

[Guest peter2b2002]

I think ive susted it there is a small pipe at the back of the carb under the choke that should go to the dizy , no pipe+ there was a load of crap in the float area, not had time to try starting the engine yet ,do that on monday

Peter2b