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Pinto miss fire ?
Guy33 - 17/8/08 at 08:00 AM

Hi im new to this forum thing
anybody have any ideas why my 2l pinto seems to missfire or not quite rev to the top of its range sounds like its bogging down or cutting out ?? around 6000rpm it goes very well up till then
im running a fawcet fuel pump 3/4" pipe to filter king (glass bowl) psi gauge reading 3psi twin 45 delortos bosch dizy with points (dont no if i should go for electronic ) also i think it has a lightning rod high lift cam if anyone has any ideas would be greatly received thankz

clairetoo - 17/8/08 at 08:03 AM

Points ?

rusty nuts - 17/8/08 at 10:17 AM

quote:
Originally posted by clairetoo
Points ?


So twentieth century!. Would start with the basics, check valve clearances , valve timing , dwell angle (although well worth going electronic or even megajolt? ) Have also had problems with the advance mechanism in the distributor sticking and not giving the required advance which could cause your symptoms?

flak monkey - 17/8/08 at 10:58 AM

Points will start to play up once you hit 6000rpm, so its most likely your problem.

If you want to rev it harder you need to go for an electronic system, either a stock one or a custom built one from someone like H&H Ignition Solutions.

David

britishtrident - 17/8/08 at 10:58 AM

Ford (ie Autolite or Fomoco branded) or Bosch distrubter (brown cap) ?

The points gap on the Ford (ie Autolite or Fomoco branded) distibuters tend to close up in the first few miles use --- cheap branded after market points are worse for this.

To combat this make sure the distributer cam is greased and the points are gapped to the top end of specified range (0.23" to 0.27".
Bosch dizzies use a narrower gap.

Also make sure the condenser retaning is screw is tight on the base plate and he wires to the points are correctly fitted, and give the centrafugal adavance mech a tiny drop of oil.

Also check the carb jets are screwed home tight in the carb body --- amazing how often you find a loose jet in a weber carb.

However it could be a fuel flow problem -- IMHO Filter Kings are snake oil, the fuel pump should be selected that suits the carbs without any extra gubbins.

You really should try and identify the cam -- and find the peak power and peak torque rpm. istr a standard Pinto has peak power at 5,000 rpm -- even by the standards of 1970 that wasn't high.

Mark Allanson - 17/8/08 at 10:59 AM

My pinto does exactly the same thing, runs like a dream until 6000rpm - I put it down to the rev limiter though!

[Edited on 17/8/08 by Mark Allanson]

Guy33 - 17/8/08 at 04:57 PM

Wow all this sounds good thankz vmuch goin to try a few ideas