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The O2 is brand new but you could be right, it could be the issue

I changed the right front break pads because they have a slow speed squeak that's really embarrassing. I also found out that my washer bottle was full of slimy black ooze, so I changed that out. The car still has a issue in the sensors for closed loop but I'll get that fixed eventually.

12 is no faults. Umm it's got to be something simple. The sensor loop is reading. How old is the fuel?

Have you ran a diagnostics?

Aggghuuuuuhhhhh!!!!! It's back!. Was out on the high way today with my wife driving and she was gassing it out of a corner when it spluttered and wouldn't pull, she tapped the gas again and it kicked down and went. Stopped at a friends and when we leave the problem was back. No power to pull...

Update. Got it! Must have been a combo deal of 2 sensors that tested fine but reading out of range. Was the TPS because the trans shifting nicer between 1st and 2nd now. And I have no O2 lean code now, plus it runs just as nice cold as warm. What a frustrating journey, now time to enjoy driving...

I have replaced the O2 and the TPS with new out of the package units and just the same!

Ah all the research I'd done said passengers behind the starter. Oh well job for another day then. The max upload is 5mb so I can put up a video. It will slowly pick up to 3000rpm then just falls flat no matter how hard you put your foot down, it will even pop sometimes. I put it on a...

I think ill have to get it into an auto sparky and run it across the scanner

I robbed a knock sensor off a pre ecotec motor as they are the same part number, took the plug off the block behind the starter. Can't quite remember which plug I had to add to the computer loom D5?, B5? I can find paperwork. The computer and memcal were out of a VR 185i HSV so has a knock board...

I did the knock loom, really quite easy, one wire. I've back probed the computer and everything that needs earth has it and all are signals are getting to the computer. For the price of it I might just put a coil in. I do know a guy with an hsv I can test parts off his car. It's a fault...

It's done it with both computers the memcals , it does feel like its pulling the timing but I've check that in diagnostics mode. The only thing I can think of and I'm not sure how to check it but the timing Mark's could be I the wrong spot or its skipped a tooth on the cam chain?

Its logging a lean O2 sensor The plugs have been done, the leads tested, the dizzy cap is new. I'm leaning away from coil and ignition module because of how well it runs in open loop.

It's a legit hsv computer with knock boards and sensor etc I have a stock computer and tune too.

A couple tanks of fuel. Its not an everyday car.

You know what I see is the old rat nest under the plenum trick going on there.

Yep, put in another one and ran it for a week, no difference. Back probed everything I could and it's not a wiring issue.

So long yarn short. I have a 304 in a VS Calais. Nice enough car, strong motor, 140km, HSV chip and knock sensor. It starts, idles, does everything it should right up til the computer goes into closed loop. Then it will not power away, splutters under heavy acceleration, you couldn't pass a car...

Thank you all for your input. I shall stay clear of this.

His exact words. I quizzed him more and said he got it from a mate who used to work with the brock team. I'm not convinced the numbers mean anymore than Holden standard casting now.

The guy selling thinks it's a hsv brook manifold. Is he correct and what's it worth?

UPDATE.... Thank you so much for your time and input. I have tested every possible sensor and combo of that I could find a multimeter setting for. My wife finally figured it out with some bouncing theories back and forward. And running a multimeter over the o2 sensor driving. I drained off...

I can't guarantee it's not one of 'Ebay's finest.. The other memcal is an hsv 185 with a knock board and I'm putting the sensor on.

Thank you I'll work that through this morning. The temp sensor itself tests fine. I thought maybe the closed loop was a bad tune. U need the Vats removed off my other memcal so it will run in this car. Thank you everyone who spelled it for me Now that's a theory I will pursue today. If I...

I'm getting the vats removed off another chip so I can confirm it's not a closed loop tune problem and they'll give the memcal a tick or 2 while in there

The temp sensor is going to have to come out for one reason or the other. At the moment what it is proving is that it is a closed loop issue. By unplugging it the computer thinks the engine is cold started and runs open loop. I'll check and will post results

Checked and done. Most definitely lean. Splutters pops, really quite undriveable. If it's cold, hooks up and spins the bags and the engine will rev and is.....well 1996 powerful I'm outside Invercargill

True. The cars done maybe half a tank of fuel on them It's not a small annoying pink or miss it's actually quiet undriveable, unsafe on the road cos you can't move off if it decides your not getting power

Thank you. You are right about replacing it but there is enough sensors and wearable parts on the outside of the engine that could cause problems to burn the better part of a grand chasing a phantom that I'll take a bit of extra time and test first. Plus I'm deep enough into this car already it...

I haven't replaced that yet, my logic was if it was reading to low it would stay in open loop and run rich, if it read to high they tend to richen the mix to compensate. Do you know the specs for ohms testing these?

The filter is new, I've been in and replaced pump with a spare I had so I know the strainer is there. Plugs are new, I haven't checked the gap but I will add that to the list tomorrow. The leads I have been through with a multi meter and tested. I have also changed out the computer and...

Correct. The engine light comes on, but that's understandable.

Hello, long time lurcker, first time poster. So long story I picked up a vs Calais 5L v8 auto for 4 boxes of beer about a year ago. No oil pressure, trans suspected blown, diff maybe gone, bald tires, lowered mags etc. 12 months later and far too much money I have worked through every issue...