Spark plug fire spark at outside of the engine??????

cheng_Y

Junior Member

cheng_Y

Junior Member
Aug 5, 2011
17
1
503
Kuala Lumpur
Car : WIra SE 1.5 EFI Siemen VDO

Issue :
- The spark plug spark/fire spark at outside of the engine block.
- Intermitend not every time.

Effect :
- Engine not running smooth when idling.
- Some time engine will mati.

Action taken :
- I change plug cable (Aro speed 10.4mm)
- Change coil - Bosch German made.
- Change spark plug (Normal type RM25, gap setting 0.7mm)
- Change Map sensor.
- Change crank sensor.
- Top overhaul.

Finally :

PROBLEM UNSOLVE!!!!

What could be wrong?????? PLEASE HELP????
 

ken yeang

6,000 RPM
Senior Member

ken yeang

6,000 RPM
Senior Member
Feb 2, 2006
6,618
1,327
1,713
I used to have the problem, until I changed to a set of new spark plug cables. The old cables insulation developed cracks, and spark "flew".

Perhaps you should check electrical grounding cable/wiring in the engine compartment.
 

Izso

NA NA NA NA NA
Helmet Clan
Moderator

Izso

NA NA NA NA NA
Helmet Clan
Moderator
Mar 28, 2004
15,334
6,400
5,213
KL
I just noticed you changed to the Aro (speed I assume) plug cable.. why la? The best 'cheap' one is still stock, ie- bougicord. Try using back your old cables or try swapping with a friend and see if it solves the problem.