R32 GTR not running too flash

[ALL GTR]

My GTR isn't running too crash hot.

It's missing something shocking. But it only seems to do it when it is warm after bout 20mins of driving.

Ive changed the plugs and put Splitfire Coilpacks in it and its still bad.

Any other suggestions???

[MANWHORE]

"it's missing something shocking"

Then buy another one and put it back in???

[cameron]

More details... please explain when the miss occurs etc

[7heavn]

Is it missing only underload or all the time?. If it's missing underload and mainly after it gets hot you might be looking at a faulty CAS(crank angle sensor). If it's missing even when free reving out of gear you may have one or two dirty AFM's that need cleaning or a shot.

What plugs are you running and at what gap?.

[gtrken]

Coil pack or packs

Cheers

Ken

[meshmesh]

Coil pack or packs

Cheers

Ken

Ken, he said he's changed them already.. There was a thread by Warz some time ago, and 7heaven is on the mark, turned out to be the CAS which was way out.. and caused heep of detonation.

[NismoGirl]

He could have been unlucky enough to get a faulty coil in the pack but.

Are your spark plugs gapped right?

[ALL GTR]

Not sure what the gap is on the plugs but I had a set in them for 2 months before this started happening. they are NGK Platinum BKR7EVX.

It misses all through the rev range and even at idle. It idles very rough. Ive noticed the oil pressure down realllllly low. Not sure if that is tied in with this problem or it is another problem.

How about injectors being clogged up?? Im taking them down tomorrow to get them cleaned. Ill keep you posted to see if it works.

I got the new coil packs, not the standard GTR ones but new Splitfire ones.

[gtrken]

Ken, he said he's changed them already.. There was a thread by Warz some time ago, and 7heaven is on the mark, turned out to be the CAS which was way out.. and caused heep of detonation.

Oops sorry, my bad.

That's what you get for not reading the post properly and hungover.

I would suggest get a w/shop to do a quick check of the timing and a/f ratios.

It may be a dead fuel pump, dodgy a/f meters ( quite common) or maybe a gasket has gone on the intake and allowing a lean mixture on 1 or 2 cylinders.

Cheers

Ken

[The Alchemist]

also check out the cam angle sensor...get a tech to scope pins 1 & 2 on the 4 pin plug. pin 2 is the 1 degree signal & pin 1 is the 120 degree signal. 0 - 5v square wave. Pin 3 is 12v pin4 is ground....I think

I just scoped my mates 300ZX cam angle sensor and found 2 of the 6 120 degree signals dropping out. This won't be enough to cause a hard fault code in the ECU but will make the engine run very rough at odd times.

We will be replacing it with a friends good CAS and verify that its indeed the problem ..

regards Mike

[Gav]

Two options I can suggest:

May be the exciter module (finned aluminium module at the back of the coil cover)

These are the same as used on the RB20 motor. Borrow a known good one from a friend and see if this does the trick.

Secondly, check the coil harness. The earthing spade/lug may be dirty and not making good contact. Also check the coil pack connectors for cracks. If nothing obvious, then again see if you can borrow a harness and swap this for a trial.

Good luck