Engine miss when hot

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retrovan
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Re: Engine miss when hot

Post by retrovan » Wed Dec 19, 2018 3:36 pm

Did you take one on the distributor Body and maybe inside the cap (need to stop and remove cap fast and read shaft inside)

Electronics normally have a temp warning of 60 degC

Herman


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John Alves
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Re: Engine miss when hot

Post by John Alves » Thu Dec 20, 2018 7:01 am

will do that next time
No sense being pessimistic. It wouldn't work anyway.

1958 1600 TP Karmann Ghia
1968 1600 TP Beamish buggy
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Re: Engine miss when hot

Post by fourier » Fri Dec 21, 2018 4:20 pm

A different angle...

Not perhaps a large bunch of keys swinging on a worn out ignition switch?
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Re: Engine miss when hot

Post by John Alves » Fri Dec 21, 2018 7:19 pm

fourier wrote:
Fri Dec 21, 2018 4:20 pm
A different angle...

Not perhaps a large bunch of keys swinging on a worn out ignition switch?
I have heard of this before I will try and drive the car just with one key and see,
Retrovan the temperature inside the dizzy is 54º
No sense being pessimistic. It wouldn't work anyway.

1958 1600 TP Karmann Ghia
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Re: Engine miss when hot

Post by fourier » Fri Dec 21, 2018 10:32 pm

Tried driving with the engine lid open/removed, to eliminate possible heat issue?
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Re: Engine miss when hot

Post by John Alves » Thu Jan 03, 2019 4:31 pm

I removed the plugs and food them all sooted up, replaced plugs with Champion (I was using NGK) leaned out the carb slightly and all seems 100% now
No sense being pessimistic. It wouldn't work anyway.

1958 1600 TP Karmann Ghia
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Re: Engine miss when hot

Post by acpaterson » Thu Jan 03, 2019 9:53 pm

Hey John,

did you try different Spark Plugs? ;-P

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Re: Engine miss when hot

Post by John Alves » Fri Jan 04, 2019 9:14 pm

acpaterson wrote:
Thu Jan 03, 2019 9:53 pm
Hey John,

did you try different Spark Plugs? ;-P
Yes I have always used NGK plugs but had a set of Champions and decided to use them instead
No sense being pessimistic. It wouldn't work anyway.

1958 1600 TP Karmann Ghia
1968 1600 TP Beamish buggy
1968 1500 SP Beetle

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Re: Engine miss when hot

Post by John Alves » Fri Jun 14, 2019 9:35 am

After fiddling with a million things again with no improvement I decided to take the dizzy cap off and clean the terminals on the cap and rotor again,
but this time found the the central terminal on the cap was missing, I had not noticed this before (dum ass) replaced with another cap and it has improved the situation by 80% the miss is still there but very slight and now at all temperatures. Incidentally, I have a short on the rear right light,No plate light and from dim circuit causing fuse
blowing out. I have driven the car with blown fuse until I have time to track it down and fix it. Could this cause any problem even though fuse has blown
and no power is flowing through that circuit?
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No sense being pessimistic. It wouldn't work anyway.

1958 1600 TP Karmann Ghia
1968 1600 TP Beamish buggy
1968 1500 SP Beetle

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Re: Engine miss when hot

Post by 73type2 » Fri Jun 14, 2019 11:25 am

This might not be related to your problems but I found that some (if not most) replacement fuel pumps you get nowadays push out fuel at too high a pressure. I've read somewhere that Solex carbs like something at around 2.8 psi. I plumbed a fuel pressure gauge in my Beetle to check the pressure of a brand new replacement pump I bought from Midas. It read 6 psi. I replaced it with a small Brosol pump I had in my parts bin and obtained a reading of 3.2psi. My engine seems much happier now.

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Re: Engine miss when hot

Post by John Alves » Fri Jun 14, 2019 11:55 am

this definitely an electrical fault as its a split second intermittent cut out rather that a fuel starvation fade
No sense being pessimistic. It wouldn't work anyway.

1958 1600 TP Karmann Ghia
1968 1600 TP Beamish buggy
1968 1500 SP Beetle

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Re: Engine miss when hot

Post by John Alves » Fri Jun 14, 2019 2:15 pm

Tracked down the short in the circuit mentioned before, (pinched wire) repaired it, no more fuse blowing, but still has a miss albeit to a lesser degree since I replaced the dizzy cap. The mission continues
No sense being pessimistic. It wouldn't work anyway.

1958 1600 TP Karmann Ghia
1968 1600 TP Beamish buggy
1968 1500 SP Beetle

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Re: Engine miss when hot

Post by Riaan.N » Fri Jun 14, 2019 5:13 pm

Could it be the condenser?

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Re: Engine miss when hot

Post by John Alves » Tue Jun 18, 2019 1:51 pm

no condenser, I have electronic pick up that is working (removed form another car)
No sense being pessimistic. It wouldn't work anyway.

1958 1600 TP Karmann Ghia
1968 1600 TP Beamish buggy
1968 1500 SP Beetle

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retrovan
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Re: Engine miss when hot

Post by retrovan » Tue Jun 18, 2019 2:08 pm

take a direct wire from your battery to the ignition system, and see if your problem is over, maybe you have an bad ignition switch with bad contact.

Also check your earth strap from body to gearbox.

Maybe run an separate earth from the battery as well, just to make sure.

Herman
1952 Split Beetle 1835cc (Azure Blue)
1968 Fastback 2Lt.type4( Red)
1972 Low Light Bay Panel Van 2Lt type 4(White)
1975 Fleetline Panel Van 1914cc (Aqua Blue/White)
2019 MeFusco Beetle Truck

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