Author Topic: 281 or 283 ignition problems  (Read 7003 times)

Offline 4x4-581

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281 or 283 ignition problems
« on: May 25, 2013, 01:11:36 PM »
So far i have replaced the coil, plugs, leads and points and its still got a very bad constant miss it develops from 1800rpm on.
The dizzy cap is new and im unable to find a new button.
Any ideas?
what are the best plugs?

Offline dkg001

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Re: 281 or 283 ignition problems
« Reply #1 on: May 26, 2013, 01:43:50 PM »
From the workshop manual,

engine missing or cutting out at high engine speed

                              1) electrical ; distributor * point gap incorrect
                                                                    * automatic spark advance not working

                                                    low voltage to spark plugs.

                                                    fouled spark plugs.


                                    2) Fuel ,   Carburettor, fuel level too low
                                                                   Inoperative pump 
                                                                   Dirt in main jet
                                                                   partially closed choke plates
                                                                   restriction in filter

                                                Fuel pump, low pressure
                                                                  low volume
                                                                  restriction in filter     

                                     3) Mechanical, air cleaner improperly installed
                                                            incorrect valve to rocker arm clearance
                                                            late valve timing
                                                            loss of engine compression

Recommended spark plugs; Severe service; KLG FS-70
                                          Normal service AC 43, AC 44, Champion J10








 

Offline Richard Farrant

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Re: 281 or 283 ignition problems
« Reply #2 on: May 26, 2013, 07:34:31 PM »
The first thing I would have changed before the coil, would be the condenser. They are renowned to fail, in fact if checked when new, a good number are faulty. Not a good idea to use old stock either. They deteriorate internally. If you notice the points have been burning, it is a sign of a failing condenser.

cheers, Richard
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1943 Bedford QLD
1943 Daimler Scout Car

Offline 4x4-581

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Re: 281 or 283 ignition problems
« Reply #3 on: May 28, 2013, 06:04:58 PM »
I replaced condensor, wondering if it could be a worn bearing or other type of part in distributor.
I have adjusted points in other makes of cars and never had so much trouble so I don't think it
Is the gap. The taco needle bounces around like it's the points though.

Offline Chazza

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Re: 281 or 283 ignition problems
« Reply #4 on: May 29, 2013, 02:50:40 PM »
I replaced condensor, wondering if it could be a worn bearing or other type of part in distributor.


Put the timing light on it whilst is running, and if the distributor is worn, the timing mark will move about; this also caused by a loose clamp bolt.

Find the NGK equivalent of the champion plugs on their website and buy NGK.

Do as dkg001 suggests and start with valve clearances; compression test; complete ignition system, including coil and HT leads; and then fuel system.

A bad misfire above 1800rpm, sounds like a weak spark to me. Does it misfire on one cylinder, or all of them?

Cheers Charlie
S2 Command Recce '59
S2A 109" GS '63
S2A Fire Truck '64

Offline cookey

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Re: 281 or 283 ignition problems
« Reply #5 on: May 29, 2013, 03:13:48 PM »
Also check the "pigtail" wire going to the points, and the earth wire on the advance plate. In the past I have found broken or damaged wires and bad connections.

Cookey
lost count

Offline 4x4-581

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Re: 281 or 283 ignition problems
« Reply #6 on: May 29, 2013, 10:16:39 PM »
I ran a extra earth wire to the advance plate in dizzy and the other night I pulled a plug out and started it
The spark looked really weak.......like a candle on a windy day.
It has got me beat, plug reach should be 3/8, my measure to about that.
Timing mark does not move at all.
The power for dizzy comes direct from battery via relay
For both dizzy and elect fuel pump switch via old ignition wire.

What currently available plugs are in yours?
Pig tail is my next idea aswell.

Offline cookey

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Re: 281 or 283 ignition problems
« Reply #7 on: May 30, 2013, 05:49:22 AM »
Have you got coil polarity right?
Neg terminal should go to points.

Cookey
lost count

Offline Richard Farrant

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Re: 281 or 283 ignition problems
« Reply #8 on: May 30, 2013, 07:49:19 AM »
The spark looked really weak.......like a candle on a windy day.
It has got me beat, plug reach should be 3/8, my measure to about that.

What is the plug gap set to?
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1943 Bedford QLD
1943 Daimler Scout Car

Offline Chazza

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Re: 281 or 283 ignition problems
« Reply #9 on: May 31, 2013, 09:49:05 AM »
NGk equivalent of Champion J10  is BP6S http://www.ngk.com.au/spark-plugs-part-finder/cross-reference?PageMode=3&PlugNumberB=J10Y

Definitely sounds like an ignition problem; weak spark can be caused by a poor coil, as well as everything else mentioned by everyone,

Cheers Charlie
S2 Command Recce '59
S2A 109" GS '63
S2A Fire Truck '64

Offline Justwanted1

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Re: 281 or 283 ignition problems
« Reply #10 on: May 31, 2013, 10:56:53 AM »
I dont mean this to sound like a paid advertisement.. But I did see on ebay that Wagga Tractors has a complete tune up kit with plugs, points & condensor available.

In the old days I remember 281 / 282 had Champion J8C plugs.

Offline 4x4-581

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Re: 281 or 283 ignition problems
« Reply #11 on: July 04, 2013, 07:41:06 PM »
After trying everything i removed the dizzy to have a better look, the part that connects the dizzy drive to the cam drive were all floppy and a screw was hitting the vac advance.
I had a guy clean it up for me and put a new cap and button in.
Did a quick test drive (inter quick) ,made a few timing adjustments and it has now picked up a gear on most hills.




Offline Acco 4x4

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Re: 281 or 283 ignition problems
« Reply #12 on: May 24, 2014, 09:05:21 PM »
I dont suppose anyone has the Bosch part numbers for the ignition parts for the 281? After rotor, cap, points and condenser. All the current catalogues don't go back to 1964! lol

Offline Bluebell One-eight

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Re: 281 or 283 ignition problems
« Reply #13 on: May 30, 2014, 05:56:07 PM »
I dont suppose anyone has the Bosch part numbers for the ignition parts for the 281? After rotor, cap, points and condenser. All the current catalogues don't go back to 1964! lol
There are  minor differences between the Mk3 & 4 distributors the cap no. for Mk3 is 1235522123 Mk4 1235522147 rotor Mk3 & 4 1234332072 points  Mk3 1237013008 Mk4 1237013054 All are Bosch numbers. Be aware that either distributor could be fitted to any engine. I'm not sure on interchangeability. I used a "Mk 3 " cap on the Mk4 dizzy and it fitted with no problems. so proceed with caution!

Offline Acco 4x4

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Re: 281 or 283 ignition problems
« Reply #14 on: September 07, 2014, 01:12:44 AM »
ok, 2 dumb questions……

1, Where is the ignition timing marks on a 282? (too lazy to look………)

2, Does the distributor have an index to align No1 cylinder up? (rotor button to face the mark on No1 TDC, like a holden 6) or do i make it up on the fly. A holden 6 dizzy can be put in at any position and as long as the leads are in the right starting position it will work but they are suppose to start from a set point and the dizzy installed to align the rotor with the mark on No1 TDC, does the inter have this?