Hey guys. past few days, the VL has been running really bad, missing heaps under 3000. i done the following today: new plugs new leads new rotor button new dizzy cap new air filter 2 weeks ago: AFM o2 Sensor i reset the timing on the dizzy, and got it right, but it had no power what so ever at 15* bumped it to 25* and it was pinging, its now sitting at around 19 and its missing every once in a while. usually blows lots of fuel smoke also on takeoff anyone have any ideas before i burn it? for the AFM was it 382 ohms between pins 2 and 4? anyone recommend a tuner for SE Melb? i wanted to get my 3" exhaust first, but i gotta get it running right

Vaccum leak?

nope, there was a leak off one of the vacuum hoses, but i found and fixed that. ALTHOUGH, there is a hose with no end, so i have just put a bolt in it (for the cruise) before vacuume was around 10 in/hg and withit blocked (now) its at 21 in/hg

coolant sensor? fuel pressure reg ok? just a couple of ideas

Mate what can is in it, have u replaced the cam belt at all?? Mate check ya can timing I just checked mine and it was retarded 1 tooth, fixed it up and now runs sweet

stock cam. cam belt and tentioner are a year old (checked it today, and was fine)

Try another afm.

Coolant sensor? Running rich all the time?

Unplug your AFM & see if it makes a difference. Just to rule out that. If it's missing heaps it might be your power transistor. ROUGH IDLE VL COMMODORES A common problem with the 3-litre Nissan engine is where the idle deteriorates to the point where it will not even run. Before that happens there is an initial loss of power, which just gets worse. A prime cause of this is the Air Mass Meter drifting beyond specifications - check the load pin (3rd in from back of engine - white wire) against an earth should have KOEO no less than 1.26v (excessive lean) and no more 1.32v (rich). If this load setting base is out, you won't be able to adjust the idle mixture (1st pin in from front of AMM) factory lean at 3.6v to richer say 2.0v to a satisfactory mixture - AMM will need replacing. ---------- Post added 25-03-12 at 22:01 ---------- Quote: Originally Posted by MaD_WoG [View Post] anyone recommend a tuner for SE Melb? i wanted to get my 3" exhaust first, but i gotta get it running right http://www.facebook.com/pages/JJM-Tu...wall&filter=12 (http://www.facebook.com/pages/JJM-TurboWorld/215460581840455?sk=wall&filter=12)

Tried a different AFM. same issue, missing heaps on idle, on acceleration and pinging above 3k rpm where is the power transistor????

Hasn't done a head gasket has it? Wouldnt think it would cause pinging, but the missing maybe. The oil under the cap still black?

yeah, oil is still black, water still green. just changed: Power Transistor - no change New CAS & Plug - no change ---------- Post added 26-03-12 at 15:54 ---------- JJM booked out til next week... i have got tomorrow off, then working... ---------- Post added 26-03-12 at 15:56 ---------- hmmm... i just kicked it, i feel better, but its still running really bad.... ---------- Post added 26-03-12 at 16:16 ---------- Fuel Reg??? i closed it off (put vice grips on the vacuum hose) and no change while idleing... shall i change the fuel reg? ---------- Post added 26-03-12 at 17:18 ---------- Going to Hallam Performance tomorrow, they can sort it out

before you do anything try a different computer, are you running the stock vl? i had the same problem with my n/a changed everything and the last thing i done was change the computer and it fixed. boy i was pissed off

i've only got 1 VLT computer. don't currently have a spare

borrow a mates computer if you can, will save you alot of hassle, i just last week had this problem and changed everything and done the timing+belt, i was even gunna change the head gasket cause one cylinder was down a little compression haha

just tried a N/A computer, still same problem (rough idle, no power and missing) as well as running rich (na ecu + T injectors)

Man maybe u picked up some bad fuel??? Something is way off try see if u can borrow a mates dizzy?? The rb30 has a simple management system where half the sensors arnt needed like the idol control and cold idol ect...may be check first how ya fuel is then fuel filter try changing dizzy then try may be i dunno injectors, if ya got a real good mate that will lend his car to swap parts till ya find the problem is the best bet

i thought it may have been bad fuel... topped it up... only things left that i haven't tested: injectors fuel pumps fuel filter fuel reg hopefully Hallam Performance will be able to diagnose it tomorrow, and fix it. to date, what has been done: service of oil filter, oil, air filter. new plugs gapped to 1.1mm new leads (high performance, bosch max i think) new cas new cas plug afm x2 o2 sensor dizzy cap rotor button dizzy removed and retimed timing tested between 10-20, sitting at 19 or so atm ---------- Post added 27-03-12 at 00:09 ---------- i'll change the fuel filter tomorrow morning, and see how that goes... if i give it 15% throttle or so (VERY LIGHT) it will rev up nicely to 4000 or so, as soon as i give it more,it plays up...

Quote: Originally Posted by MaD_WoG [View Post] if i give it 15% throttle or so (VERY LIGHT) it will rev up nicely to 4000 or so, as soon as i give it more,it plays up... Intank fuel pump M8 Some original photos have not been recovered yet.

on the way down today, i was gettign to around 3psi then it would start missing... i was thinking could be the 1.1 plug gaps? i told them.. .but we will see what happens, its at hallam performance atm... all i have seen with this thing past few weeks is.. $$$ $$$ $$$ $$$ $$$ spent 1k on it already... its going to get a thrashing and a half on the way home i tell ya... intake pump, what they worth? 200? would be a bitch to change as its full of 98...