waynesumner

ok so my z6 was running before i decided to change out my rear main seal. found out my dizzy was leaking so i got that sealed up. changed vtec seals because i had them. tried to start my car and nothing. checked spark and fuel its all there. i thought it may be flooded but i cleaned the plugs and let the cylendars dry out a bit then last try it backfires out of the intake manifold. read it could be the timing is advanced but the car has to be running to fix the timing right? what do you guys think this could be?

95Sedan

did you plug everything back in and make sure your gaskets properly sealed?

24TEN

iTrader: (2)

To set the ignition timing properly the car has to be running BUT it doesn't need to be running to simply adjust the timing. So now the question is did you mark the distributor before removing it to replace the o ring?

Also check the fuse panel for "starter signal" and see if that is good. I only mention that because you say you've got spark and fuel and I doubt that what you did killed compression.

95Sedan

maybe the dizzy is on backwards, I guess that's possible for some people??? definitely should have marked that before disassembling, also did you put it back together correctly if you replaced the internal seal?

waynesumner

fuse panel for starter signal? do you know which fuse that would be? i did check fuses under the hood and below the dash and all fuses were good but it doesnt hurt to double check. and to sum up the dizzy question i had a bad dizzy with a good housing i just swaped the guts and put everything back how it came out and i placed the dizzy near or around the same timing and even moved it a few times to see if it would help but still nothing. firing order is correct. and i dont think the belt jumped either.

94EG8

Did you mark the orientation of the 2 pronged drive on the distributor in relation to the shaft it goes on? You can 180 that out.

waynesumner

2 pronged drive? do you got a picture to show because im lost. I was thinking it was probably something inside the dizzy but like I said I put it back together how it came apart or maybe it wasn't gapped or to gapped between the shaft pickups.

Former User

What color is spark at the plugs?

Have you checked the mechanical timing?

waynesumner

bluish white I believe.

Former User

More white than blue?

Mechanical timing?

94EG8

The part that goes into the camshaft, see below:



It's held on to the shaft, if you didn't mark it remove the pin, turn it 180° and reinstall the pin.

Former User

Couldn't the OP set the engine to TDC1 to see whether the rotor points to the cylinder 1 plug wire?

waynesumner

blue where it sparks and then white on the arc so yea more white, mechanical timing as the dizzy or jumped a tooth? I think maybe dizzy because I didn't mark it where it was previously running and swapped the guts and now it cranks and sparks and fuel is getting to the head but sometimes backfires out the intake. ive torn the dizzy down and replaced the igniter and checked gaps between the pickups and still nothing.

Former User

Mechanical timing refers to the timing belt. You could check the mechanical timing at TDC1 and, if fine, then check whether the rotor is 180-degrees out of phase, as mentioned by 94EG8.

waynesumner

really that can make a difference?

94EG8

Yes, if it's on 180° out it wont start and will backfire out the intake. If you took that off and didn't mark it that's probably your problem.

waynesumner

ok so to be sure I just remove the dizzy, remove that prong and turn it around and reassemble?

94EG8

Yeah, remove the snap ring, slide the pin out, turn the two pronged drive 180° and reassemble. The drive itself will only go into the head one way, the two prongs are offset a little bit to one side.

waynesumner

I see what your saying but the dizzy will still mount either way just off time?

94EG8

Yes, if the drive is installed wrong on the distributor itself.

waynesumner

I turned the prong around and it still doesn't run, so how would I go about getting it to TDC because I switched housings on the dizzy again so I have the markings lined up

pityocamptes

Line up the timing marks on the cam sprocket and crank pulley. Pull the dizzy cap off and see which cylinder the rotor is pointing to as if it was going to fire.

waynesumner

ok, now the crank pulley has been replaced is there anyway if I were to line up the pulley with the cam gear the marks wouldn't be right? if that makes any sense?

Former User

Set the engine to TDC1 as below to see whether the rotor points to the cylinder 1 plug wire.

24TEN

iTrader: (2)

The main pulley can only be installed one way. If you haven't touched the timing belt or tensioner then the crankshaft and camshaft should still be in sync with one another (meaning main pulley and cam gear should still be aligned properly to one another).

Now if you find it has moved, you will need to reset your mechanical timing and go from there. If it has moved enough it would explain why your car isn't starting. I sincerely doubt it has moved/jumped a tooth but you never know.