Rb20 Sounding Like A Wrx

[honey]

Hi all, my friend just bought a R32 Skyline with the RB20DET engine 99xxxkms. Light modification of only air filter and a cat back exhaust. Now here is the problem, occasionally at idle and while driving the car will miss, sounding like a WRX.

We have changed the spark plugs and cleaned the plug boots but it still misses. Changed the fuel filter, still misses. Unplugged each injector at a time, no difference. Unplugged each coil pack at a time and found the last coil pack wasn't working so we got another coil pack and put it in thinking it would fix the problem. No good car still misses, to be sure we swapped coil packs around with ones we knew where fine to be sure it was a coil pack, still the same. Checked ignition timing, all good.

So we are running out of ideas as to what to check next. It only seems to miss when it gets hot not while it's cold but the funny thing is that when it's missing and you give it a bit it will drive fine and then sometimes it bog down. We checked the fuel pump the easy way by clamping of the return line and the revs picked up so the fuel pump is fine. We will do a fuel pressure test later but i need the specs. If anyone has them then please let me know.

We have even cleaned the airflow meter and still no good. So can anyone gives us any other things to check? How do we do a ECU fault code check? Any help would be greatly appreciated as it's driving us mad.

Edited May 21, 2006 by honey

[ToF]

Sounds like the ignitor module is being affected by heat.

[honey]

We thought that too but have swapped it with another igniter module from a friends car that works but problem is still the same. Any more tips??

[shyskyline]

WHAT BOOST IS IT RUNNING ON AND WHAT SPARK PLUGS R U USING

[blind_elk]

We thought that too but have swapped it with another igniter module from a friends car that works but problem is still the same. Any more tips??

Then it's the wiring loom onto the suspect coil; check for a minor break in the wire.