Hyster S80XL:
4.3 Ignition Issue

Pick Up & Mod. replaced and still continues to drop voltage to plugs. Any hints?
We have been all over it at this point.
Will not take hard demand and back fires..
BCS Series
  • Posted 5 Jan 2006 11:09
  • Discussion started by BluzGtr
  • Florida, United States
Showing items 1 - 7 of 7 results.
I was told if the firing order is off, you won't get voltage to the coil.
  • Posted 19 May 2021 07:16
  • Reply by Bill_Menchen
  • Nevada, United States
Bill Menchen
I have had better luck with an AC Delco platium 41-993. Most of the 4.3lt have alongger spark plug hole than a S/b Chevy which also uses th R44 &R45 pluggs. If the truck is LP need to double check the vacuum lines for any leaks.
  • Posted 19 Jan 2008 17:05
  • Modified 20 Jan 2008 12:00 by poster
  • Reply by alan_n
  • Kansas, United States
There is always a right tool for the job.
Check the distributor body for a plugged vent. This will let moisture accumulate in the rotor chamber and cause crossfiring. Latest plug spec for this engine is an AC R44LTS gapped at 0.035".
  • Posted 7 Sep 2006 22:58
  • Reply by leon
  • North Carolina, United States
We are also having problems with the spark plugs glazing up.

Replace the plugs with 44's instead of the factory 42's.
  • Posted 14 Apr 2006 00:30
  • Reply by mike_n
  • Alberta, Canada
Is the check engine light on?

We need to know the s/n so we know exactly which ign. / ecm the unit as
  • Posted 17 Feb 2006 02:39
  • Modified 17 Feb 2006 02:40 by poster
  • Reply by mike_n
  • Alberta, Canada
I just had a bizarre one a few weeks ago.
It was on a 3.0L GM in an H60.
Turned out to be the alternator!?

The only way I can figure it, is that it was leaking enough AC to cause the ign. to pick it up and missfire.
I only found it by accident. Was trying to track down some noise from the front (because of miss-fire I was working my way back to the timing chain).
Pulled the belt and oila, problem solved.

I honestly don't think this is your problem as NO ONE I know has ever seen this but I thought I'd pass it on anyway...
  • Posted 17 Feb 2006 02:25
  • Reply by mike_n
  • Alberta, Canada
ahh the good old 4.3
ok first question !
what engine series is this ? is it pre vortec ?
check the engine pan, is it steel or aluminum ?
im asuming its propane fuel ?
if so what hours has it done since the valves were done ?
one of the most common problems with early 4.3 gm engines were the exhaust valve seats burning out, the heat the propane developes in the chamber far exceeds a gas / petrol fueled engine.
under load it gives the impression of backfiring but in almost all cases when this engine runs on propane and developes such a fault it was the exhaust valve seats
if you get the heads done be sure the exhaust seats are stelite material,
a quick compression check may or may not reveal this.
just one more thing be sure the ignition wire ends are coated with silicon grease inside the plug boots its a must for hei ignition systems
  • Posted 22 Jan 2006 01:40
  • Modified 22 Jan 2006 01:43 by poster
  • Reply by ratchet
  • Ontario, Canada

Post your Reply

Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.

Having trouble using the Discussion Forums? Contact us for help.

Maersk opens French warehouse Hauts-de-France, France

Showcased in the Virtual Expo

Latest job alerts …
Louisville, KY, United States
Dubuque, IA, United States
Louisville, KY, United States
Fact of the week
On average, people read 10-30% slower from a screen than from paper.
Hangcha FLDCXT160
Braeside, Melbourne, Victoria, Australia
Hire
Aichi RX07B
Yokohama, Japan
Used - Sale