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Misfire/Sputter on boost
Posted: Tue Apr 08, 2008 10:11 pm
by VoodooMaster
A buddy of mine seems to be having a problem with his S13 (Standard CA18DET). The problem is that the car is misfiring badly when the boost comes in.
We have cleaned the airflow meter, check the turbo, plugs (BCPR6ES) + coil packs and everything seems fine.
Does anyone know what else we could check before starting to replace parts 1 by 1?
Posted: Tue Apr 08, 2008 10:57 pm
by Trance101
I can't really help you much, but i did have a problem with my sx where it would misfire badly when it got into the higher rev range. The problem turned out to be an injector plug was shaking itself loose at high rpm. It was missing the metal clip that hold the injector plug in place. Its worth checking...
Posted: Wed Apr 09, 2008 6:30 am
by Toby
Even if you have checked the plugs, I recommend replacing them. Cheapest thing to replace anyway.
Posted: Wed Apr 09, 2008 7:20 am
by ChemCool
Now a days, I feel there is no short cuts, start to eliminate even further.
Chem
Posted: Wed Apr 09, 2008 7:34 am
by rat
Not enough fuel when coming in to boost? just an idea i am not very technical so someone correct me if i am wrong
Posted: Wed Apr 09, 2008 8:23 am
by Draco
Mine did that when I got my car....fuel pump
Posted: Wed Apr 09, 2008 8:26 am
by rat
The std pumps are 17 yrs old, both of mine have lost most of there pressure.
Posted: Wed Apr 09, 2008 11:09 am
by jon
Check your fuel pump, fuel filter and fuel pressure regulator. Also get your injectors flow tested if the problem persists.
Posted: Wed Apr 09, 2008 2:47 pm
by veecee
check the gap between the coil electrode, and the sparkplug electrode.
there is supposed to be a spring, or a carbon bit on a spring, it may not be making proper contact with the spark plug electrode!
Posted: Wed Apr 09, 2008 2:53 pm
by SlowMo
sounds like a coil pack or two is on its death bed
Posted: Wed Apr 09, 2008 4:47 pm
by ChemCool
or what about the AFM ?
Chem
Re: Misfire/Sputter on boost
Posted: Wed Apr 09, 2008 6:55 pm
by Cuzz
VoodooMaster wrote:A buddy of mine seems to be having a problem with his S13 (Standard CA18DET). The problem is that the car is misfiring badly when the boost comes in.
We have cleaned the airflow meter, check the turbo, plugs (BCPR6ES) + coil packs and everything seems fine.
Does anyone know what else we could check before starting to replace parts 1 by 1?
Replace the Fuel filter and spark plugs. If problem persists check fuel pressure.
Other wise try using BCPR7ES.
Posted: Thu Apr 10, 2008 7:44 am
by ChemCool
heheheheheehehehehehe..... or replace the CAS???
Tell me when you dudes need the manual.
But in a way, basically all these dudes tell you to eliminate. They just do it in a very slow manner and the trend of this thread boils down to elimination.
Chem
eish
Posted: Thu Apr 10, 2008 9:57 am
by Driftmeister
i have the same issue who can i visit here in cape town
Posted: Thu Apr 10, 2008 11:08 am
by S14200sx
Try to use Iridium plugs.I had a simmilar problem and only the iridium plugs would work.