donuts2001

Well I managed to fix this problem:
Rattle noise under acceleration

I took the lower inspection plate off the auto, and revved her up and no noise!!! So my only thoughts is that the bolt heads were making contact with the inspection plate when the revs increased(maybe suction from the torque converter or a bit of warping... dunno). Couldn't see any real big scrape marks on the inspection plate though, but I'm pretty sure that was it.

Now my next problem!! Seeing that I can rev her up really high now(in park and neutral at least) because the rattle noise is gone I've encountered a new problem!

I put the pedal down and what I end up with around 4000RPM+ is the motor backfiring through the exhaust like all shit. The motor was cold when I was doing it, and I know thats technically bad, but surely it shouldn't be backfiring heaps. I did get a 2.5" straight through zorst only a week ago, so I dunno if these type of noises are normal. It sounds like a V8 super car on the brakes, when it should sound like a i6 on the throttle I'm thinking :|

I'm thinking the cam gear is a tooth out, as I have done work on the motor and set the cam position as best I could. How many teeth forwards and backwards can the cam be put before contact with the piston and valves occur? I want to play with the cam timing, but i'm too afraid of the damage that may result.

Any ideas on my backfiring or the cam timing issues?

B-1B

I would check that the dizzy isn't 1 tooth out first before getting to the cam.

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donuts2001

Heh... with the EA dizzy's one tooth out on the dizzy means no starting.

So what do you think I need to do, advance or retard the ignition timing? My car idles like a dream, doesn't run rough or anything, starts first turn of the key but as I suspected is lacking top end power. More things to fix I guess :|

SiX_iN_a_RoW

Sounds like the ignition timing MAY be retarded, although you are better off bringing it to operating temp and setting the base timing, then give it a test. Other than that does it want to rev above 4000rpm or does it just sit there popping? if it does it could be a fuel delivery problem, however it does sound more like timing. I wouldnt go playing with the cam timing just yet...

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donuts2001

Yeah it just sits there popping and doesn't really go up any higher. Oh yeah I just tested it again when the engines hot and it doesn't do it all.

I wouldn't be surprised if it's a fuel delivery problem.. the fuel pump is one of the mechanical things left on my car I haven't replaced

The ignition timing is pretty close, I've done it recently but the harmonic balancer has slipped so it's a bit of a guesstimate.