Lota/wynnum... id be willing to supply incentives to help, Beer/money/sexual favours(if you get it running) ILL F***IN DO ANYTHING
So the plugs are black and vac leaks help. Certainly a rich mixture then. check for restrictions on the intake side of things. then check for reasons of overfueling. fuel damper or regulator leaking thru the vac pipe?
Yea we figure as much as the rich mixture, but it cant be the injectors the were cleaned etc, ill check your suggestion now...
My car came with an AFC (air/fuel controler) confirming the rich mixture, we shut down 2,4,6 and wound it lean, IT RUNS, except reversing that, 2,4,6 likes a richer mixture, hence why its not running. Datascan shows injectors are good, and we cant find any air restrictions.. ANY IDEAS?
unplug and block off all non essential vac lines including fuel reg and damper. Ive seen some weird ones where vac pipes sucking fuel directly to the manifold from a busted fuel reg or fromt he fuel tank through badly matched up charcoal canister pipes
Both canister pipes plugged, seems to help slightly but nothing great, still has the popping and carrying on, balance bar is clear... there is a oily residue in the plenum... but im guessing that will suside without the carbon canister pipes.. would idle air do anything to it once the butterflies open? could that cause me any greif? Im just now looking to replace the engine bay loom...
anyone with the knowledge willing to come out to wynnum(south east brsbane) to have a gander? as mentioned earlier i will provide incentives, name your price! (sorry the sexual favours were a joke)
Wiring Just wondering if you marked all the injector/coil plugs when you pulled it apart? Maybe injector plugs are on the wrong injectors. When you say popping do you mean 'backfiring' or is it different? Cheers Jason
We have double and triple checked firing order - although the guy that pulled it apart didn't label everything we have sorted it all out now. Both injectors and coil packs are correct. Its backfiring into the exhaust - it will run on the RH bank if we shut the other bank down in datascan, - it runs better when we lean the mixture right out.....(either on the SAFC or by introducing vacuum leaks) Its getting too much fuel from somewhere, or not enough air. There are no blockages in the intake (plenum has been off again and checked), injectors have all been cleaned and flow checked. We are currently changing the harness over to a better condition one which I have from my parts car, connectors etc are in much better condition, hoping there may be a broken wire somewhere in the harness.
CAS connector? When you replaced the CAS did you put on a new connector? 2 of my cylinders wernt firing due too the connector.
Latest information... CAS plugs good on the new loom - changing the loom over made no difference. Replaced all Injector plugs, and tried blocking all vacuum ports and no change. Have tried 2 other dampers and regulators, checked on the compressor that the regulator is good at approx 45psi. Last night did 2 plenum pulls - the first we checked the rail was sitting right (seemed to be sitting up a bit on one side) and changed the pipe between the 2 fuel rails, no change. Pulled the plenum again and put the rails and injectors in from the parts car - no change. There are no blockages in the plenum. The only idea we have come up with is that the IACV is playing up, and causing an imbalance between the sides of the plenum at an idle. Is this possible Shouldn't the balance bar be able to compensate even if there was a problem? Any help would be appreciated
IACV won't affect just one side How about: * blockage in intake pipes before plenum? * disconnect the 02 Sensor? * throttlebody butterfly not opening in sequence with the other side for some reason? * On the fuel rail, there are black spacers which the rails sit on. (Pic here) Are any missing on your fuel rail? This would cause one side to look higher than another and would cause fuel leaks. * Camshaft(s) lobes broken off? Saw this on Martin's Zed during Chrispy's 100K service where the lobe on the end of the camshaft itself was sheared off. The timing belt gears were rotating, but the camshafts weren't. You'll need to take the timing belt and cam gears off but by now, I'm sure you'll try anything!!! If above doesn't help, I think you're at the stage now where you have eliminated all the usual culprits and to question the work the previous owner has done.
Just want to clarify the above. The lobes where fine, the locating pin on the passenger side intake cam had sheared off somehow. The cam did turn in time with the sprocket due to the friction of the bolt holding the sprocket to the cam, but slipped and rotated 30 deg or so. If the sprocket was rotating completely separately Martin would have a head full of bent valves. I'd be checking the cam timing myself, could be a repeat of what happened to us or just a stuff up with putting the cam belt on. Thankfully the cam gears only go on one way. Did you have the heads apart for any reason? Rebuild the lifters? The cams will only go in one way (left to right and intake to exhaust, so that will be right) Done a compression test yet? I'm thinking over filled lifters or cam timing now.
Errr, yep sorry. Thanks Chrispy for correcting me My memory isn't what it used to be ... or at least thats what they tell me
Thanks guys Have tried running it without the intake pipes with the air flow meter unplugged, should run to 2000rpm - still same problem, won't idle, but picks up 6 cylinders on a rev (as much as it can up to 2000rpm) Doesn't change anything. The injector pulse widths between the banks on datascan are pretty similar, so I don't think the ECU knows that its over fueling the one bank. Both TB's seem to be good No - all are on there, had to steal some from the parts car to make up the set, but they are all there now.... Cam timing seems correct - not 100% sure that the cams are installed in the correct spots, but they can't be mixed up? The lifters were all replaced, and initialy we didn't have compression on 1 cylinder on this bank, but we now have good compression on all 6 cylinders. Wouldn't think we would have good compression if the cam timing was out? Or could we? Have just swapped the IACV on the off chance that its causing a problem... There is a lot of fuel residue in the plenum - as though there is excess mixture getting sucked up the runners to the LH side of the plenum, and sucked across the balance bar to the RH side also....
The good compression says to me that your cam timing is probably right. That excess of fuel is a strange one...
OK - thought so..... There is a lot of fuel getting round in the plenum, the walls are wet with it - and all thru the balance bar as well....it appears to be sucking it up to the LH side, then back across to the RH side thru the balance bar, although its not noticable in the runners on that side, only looking down with the balance bar removed. Injectors are all firing sequentially - in the correct order, the car idles on the Rh bank if you shut the LH bank down - but only with approx 25-30% throttle openings.....but it is very very rich (lot of black smoke) Any ideas appreciated
