EA81 momentary dies with load/low revs
- steptoe
- Master Member
- Posts: 11582
- Joined: Thu Oct 06, 2005 10:00 am
- Location: 14 miles outside Gotham City
EA81 momentary dies with load/low revs
Ok, what's it gonna be ?
I have been getting momentary engine cut out lately when the load may be too much at low revs.Not a miss, but a scary enough whole cut out, fixed by gear change. Being LPG it ain't the carby and I have been able to drive at lower than petrol revs in all gears before get a stumbling stall as I would on petrol so sort of used to near stopping before any engine trouble from too low a revs.
The ignition module died a month or so ago, and thought this was a warning symptom, not seen it for three weeks now but it is back.
Sounds like a coil symptom I have had too !
Running original coil, HT leads older than I know, 20,000km, cap and rotor would be 20,000km old too same with plugs. I did wash the engine bay the other day. Might be coil lead breaking down, maybe I did not tighten coil connections when I swapped in a test coil when the module died. Running a used module at the moment.
Have new US souced ignition module, ($41 V's $110 here) and a coil I got 13 years ago that did not fix the fuel line crudding up inside.
May be time to just stick it all in , some new leads and plugs for good measure and check coil conns.
I have been getting momentary engine cut out lately when the load may be too much at low revs.Not a miss, but a scary enough whole cut out, fixed by gear change. Being LPG it ain't the carby and I have been able to drive at lower than petrol revs in all gears before get a stumbling stall as I would on petrol so sort of used to near stopping before any engine trouble from too low a revs.
The ignition module died a month or so ago, and thought this was a warning symptom, not seen it for three weeks now but it is back.
Sounds like a coil symptom I have had too !
Running original coil, HT leads older than I know, 20,000km, cap and rotor would be 20,000km old too same with plugs. I did wash the engine bay the other day. Might be coil lead breaking down, maybe I did not tighten coil connections when I swapped in a test coil when the module died. Running a used module at the moment.
Have new US souced ignition module, ($41 V's $110 here) and a coil I got 13 years ago that did not fix the fuel line crudding up inside.
May be time to just stick it all in , some new leads and plugs for good measure and check coil conns.
- Silverbullet
- Senior Member
- Posts: 2921
- Joined: Mon Aug 23, 2010 6:20 pm
- Location: Adelaide
Replace the coil and leads for a start, sounds like they're long overdue
My intermittent misfire was fixed by new coil and rotor although it's not the same issue you have. Does your issue occur nearly every time or is it intermittent?

Will it ever end!?
-EA81 TWIN CARB!!!!
-L series 5 speed
-Custom paint job
-2" lift
-Full custom re-wire
-L series front end

-EA81 TWIN CARB!!!!
-L series 5 speed
-Custom paint job
-2" lift
-Full custom re-wire
-L series front end

- steptoe
- Master Member
- Posts: 11582
- Joined: Thu Oct 06, 2005 10:00 am
- Location: 14 miles outside Gotham City
I have a habit of going around corners and roundabouts at about 30 kph in third - this now tends to induce the problem - but still intermittently - it is lazy but torquey old LPG allows this
I cannot expect the used module to last a lifetime - done about 2000km for me so far, likely got 250,000km on it anyway. At least now keep new coil and modules in under me seat, screw driver and 8mm spanner sliding around somewhere there too 
Reckon I will go the lead set first. Not sure why but I have adopted the let it fail before replace method. Yet to need a tow truck


Reckon I will go the lead set first. Not sure why but I have adopted the let it fail before replace method. Yet to need a tow truck

- steptoe
- Master Member
- Posts: 11582
- Joined: Thu Oct 06, 2005 10:00 am
- Location: 14 miles outside Gotham City
Got a new set of Bosch leads onsale at autopro - made no difference what-so-ever. maybe I should actually fit them
Still get it down low at same conditions, thought it may be the newish clutch just letting go and whump grabs again. If I had a tacho may see more ..... as in tacho drop to zero might help suggest electrical

Still get it down low at same conditions, thought it may be the newish clutch just letting go and whump grabs again. If I had a tacho may see more ..... as in tacho drop to zero might help suggest electrical
It sounds odd to me. I know nothing about LPG, but is there some sort of cut-out on the LPG side of things.
I too love the torquey nature of the boxer engine and reply on it heavily. I tend to put my EJ22 under max load all day every day by short shifting and letting the ECU do its job managing the various ignition timing etc with all its associated sensors. 340K on her so far and no smoke yet it seems to be working. Still achieve under 8L/100 most of the time too.
The carb EA82 is a bit different, mine cannot handle that same treatment. BUT its shudders and makes it very well known it doesn't like that sort of treatment.
These things combined make me think more towards a cut-out. what happens when u attempt to take off in 2nd/3rd? Same thing one should expect.
I too love the torquey nature of the boxer engine and reply on it heavily. I tend to put my EJ22 under max load all day every day by short shifting and letting the ECU do its job managing the various ignition timing etc with all its associated sensors. 340K on her so far and no smoke yet it seems to be working. Still achieve under 8L/100 most of the time too.
The carb EA82 is a bit different, mine cannot handle that same treatment. BUT its shudders and makes it very well known it doesn't like that sort of treatment.
These things combined make me think more towards a cut-out. what happens when u attempt to take off in 2nd/3rd? Same thing one should expect.
- steptoe
- Master Member
- Posts: 11582
- Joined: Thu Oct 06, 2005 10:00 am
- Location: 14 miles outside Gotham City
Gees , you may have hit it on the head, I do stick with the primitive vacuum safety switch rather than the tachometric relay boxes and the tube that feeds it perishes at the stretched end and sucks air dropping out the fuel - about this time of year ! Must check it. Been priding self for being ready for break down, with a big lunchbox equipped with new coil, dizzy module and leads, be a shame to actually have to use them 

- Tweety
- General Member
- Posts: 1253
- Joined: Mon Jul 04, 2011 9:45 am
- Location: ea81 powered trike Victoria
Had a Fairlane 302 on lpg 25 years ago. Cobs webs cause it all to be fuzzy but had similar cut out issue.
In the end I put 12V onto a safety cut out switch and problem disappeared. Replaced switch and all good.
In the end I put 12V onto a safety cut out switch and problem disappeared. Replaced switch and all good.
[SIGPIC][/SIGPIC]Tweety trike- EA81 (full reco 2014) 32/36 weber, SPFI manifold, 9.5:1 CR, VW auto.