Help Please

[black33gtst]

Hi All,

Wondering if anyone has any ideas on this problem.

A couple of days ago i started my Series 1 R33 GTST and it sounded like it was running on 5 cylinders, I thought i had dropped a plug or coil. I pulled off the cover over the coil packs restarted the car and disconnected each coil pack to find the guilty party. I found number 4 was making no difference to the idle so thought i had located the criminal. I proceeded to swap out number 2 plug and coil to see if the problem then moved to number 2. alas problem stayed at number 4, I then swapped both number 1 plug and coil into number 4 and still the same problem, so I am convinced it is not a coil or plug issue.

I then drove the car cautiously as it vibrates at about 2000 revs and i went for 15 kilometres came out of shop and started the car and hey presto no chaff cutter, I drove it the 15 ks home no dramas all normal.

The next morning i satrted it and it dropped a cylinder again, drove it the 15 ks again restarted same problem went another 2 ks restarted and all was good again.

went to my sisters for xmas stayed 3 hours jumped back in car started no dramas drove all the way home with no problems.

Any Ideas

[mad082]

it could be moisture in the wiring harness plug, or a short in the wiring harness, or the ignitor.

[black33gtst]

it could be moisture in the wiring harness plug, or a short in the wiring harness, or the ignitor.

Thanks mate,

All was dry doesnt explain why even with 2 different plugs and coils it still goes back to number 4

[mad082]

if it is always at number 4 then it means it is to do with the wiring or ignitor not coils or plugs.

also check that the injector plug for number 4 is on properly.

[black33gtst]

yes i realise its not plugs or coils as i have elimenated that what i want to know is it possible that i have a sticking valve as it seems to be intermittent

[mad082]

the times i have seen this before have had the following solutions- on my mates 180sx the plug on the injector for number 1 was faulty. on my mates r33 his ecu was fried (had a hole melted in it), but it kept frying number 6 coil.

if it was a sticking valve i think it would me a bit less intermittent. and it seems that when your car is warm it goes away.

[black33gtst]

the times i have seen this before have had the following solutions- on my mates 180sx the plug on the injector for number 1 was faulty. on my mates r33 his ecu was fried (had a hole melted in it), but it kept frying number 6 coil.

if it was a sticking valve i think it would me a bit less intermittent. and it seems that when your car is warm it goes away.

thanks for the ideas mate will have a look, by the way i ran a diagnostics on the ecu and got 55 all ok

[QRI05E]

Hmmm could be injector related... id run a decent injector cleaner with a good batch of Shell V-Racing and down shift to 2nd while doing 60km/h going down a steep hill and let it roll while revs are up... that will open up ur injectors and clean out most crap... cause injector issues usually happen when they cold and sort them selfs out as the car warms up... happened exactly same to my SSS

Let us know how you go... Good luck

Regards,

Sarkis

[black33gtst]

Hi again,

Problem is no longer intermittent, how can i test the igniter. all injector leads cleaned and on tight.

[black33gtst]

igniter is ok still has miss? help

[QRI05E]

Is the car blowing any smoke? try a compression test and see what the results are...

[black33gtst]

no smoke compression test showed all fine

[black33gtst]

problem solved new o2 sensor and split earth wire to o2 sensor