Rb26Dett Missfire

[drftking]

Well hello there all again,

Yet again i am on here again for more advice.

As some of you know last week i was on here quite frequently asking about an injector problem i had (From the post SARD 700cc Discontinued?)

Well i finaly got aroud to finding that yes the injectors that i had in my GTR were in fact the factory 440cc injectors.

So i bought some off a member on here and put them in, started the car and to my disgust the missfire was still there.

So i thought i would do some basic diagnostics and poped off each cap individualy as the car was running,

When i got to injector #3 as i pulled the cap off there was hardly a change (if any at all) when pulled, Making me think a possible injector harness problem.

Any sugesstions or advice would be greatly apreciated at this point.

For those of you who havent read my previous thread Previous thread

I will also point out that the yellow jacket coilpacks are virtulay brand new and the spark plugs are brand new iridums

Im getting to the point now where i might just take it to a good mechanic, but there doesnt seem to be anyone out this way who specialises in imports.

Even if anyone could point me in the right direction for a good mechanic this would also be apreciated

Again thanks (dont know where id be without the knowladge of you guys)

Cheers

Edited March 12, 2011 by drftking

[paulR32gtr]

You can test the plug with a multi-meter if you have one.

Should be able to set it on 12V DC with a probe on each contact and see the voltage fluctuate as the ECU pulses the injector. No fluctuation will confirm something wrong with the harness backwards.

[Galois]

How new are the iridiums? I have a mate with a tt soarer who went to great and expensive lengths to solve a misfire problem, only to find it was his 3000km old iridiums. That's why so many people on here run coppers, only a few are lucky enough to have iridiums last any decent length of time

[marksuxass]

If youve narrowed it down to a cylinder chick its injector pulse with a multi meter/test light, if ok maybe try swap injectors to so if it moves to a different cylinder, check spark issues (coils packs wiring and plugs). Then make sure you have compression!

[DVS JEZ]

Get a noid light or led test light to see if inj 3 has a pulse signal from the ecu. Check for 12v power on the common injector wire too.