V35 350GT Skyline - Engine missing and No power at high revs

[Jonnodawg]

V35 350GT Skyline - Engine missing and No power at high revs

Hi Guys,

I've got a 2003 V35 350 GT Skyline and I've been having an ongoing issue with engine missing and then no power at high revs. It only seems to be after I've been running the car for a while or at the end  of a trip home from work (about a 30 minute commute). I've taken my car to a mechanic a while back when I was getting a service, the missing happened at that stage while idle but it didnt seem to effect the power from the car. It had gotten a lot worse and took it back to the mechanic and they claimed it was an iginition coil.

They replaced it, drove it to work in the morning no problems. Then on the way home I when I first started driving, it wasnt too bad, maybe a rough idle at times. Towards the end of my trip I tried giving it a bit of power and it as soon as it went over 4k revs it just loses it's power.

I've gone to this same mechanic in Brisbane for years but I always seem to have issues where I have to come back to look at things so I may have to look at going to someone else. Does anyone know what this kind of issue sounds like?

Thanks in advance,

Jonno

[Wayne Sotanned]

I suggest you take it back to the mechanic and have him check whether

 1. There is any oil leak into the sparkplug chamber

2. Engine Compression for any leak, if there is then an engine rebuild is required which might cost thousands. In my case my mechanic is able to fix it with a few hundreds without having to rebuild and my car still performs well.

Is there any stutter with the rev during idle?

[Jonnodawg]

Sorry for the late reply! Haven't been able to get back on yet.

Yes it has a rough idle, but this is where it's weird. If it's cold there is usually no issue but give it about 10-15 mins of driving, when I pull up to a set of lights I get a very rough idle.But this is when the car is in drive, once I put it into neutral it stops happening, or significantly less then when in drive. Who is your mechanic? It would be great to get in contact with him.

[Wayne Sotanned]

I think there might be something wrong with the Camshaft/CrankShaft sensor as well and it is a factory-recall reported issue for our car model. My mechanic managed to narrow it down to which one specifically and my car has been running fine since then. 

He is based in Bankstown. I'll inbox you the full address if you are still interested

[Wayne Sotanned]

FYI, rough idle usually can be fixed by cleaning the Throttle Body and performing idle relearn procedure. Then after doing all that and the issue is still there then the Cam/Crank shaft sensors are next to be looked at. 

My mechanic and I went through the whole eliminating process to narrow down the root cause.

Hope that helps.

[mutex]

First thing I'd do is get a code reader to check for any error codes. Workshop or ebay.