Forty04

Alright so heres the setup

d16z6 in a 99 Civic with OBD2b engine harness, converted to OBD1 and running a chipped p28 with a stock z6 map burnt to it. (I was boosted, blew the motor, and had the chip retuned for this motor). Also, I'm running a 99-00 y8 intake manifold and just had the air injection holes filled yesterday to kill my idle surge issue.

Now, at really low rpms (when first getting into a gear) it'll miss just a little bit. And if I get on it, its fairly smooth up until around the vtec engagement point, then it starts missing more.

Dizzy, rotor, cap, plugs and wires are all brand new. Plugs/Wires are NGK standards, plugs are gapped to .044

Are there any other obvious things I should check? Anyone else run into issues like this?

Thanks in advance


Modified by Forty04 at 9:32 AM 3/30/2007

Forty04

All grounds seem to be okay. The only one in question is the Valve Cover ground, which is actually hooked to the P/S bracket rather than the V/C.

Possible cause?

Forty04

Well I got home Friday and realized that I was leaking coolant. I doubt it has anything to do with the motor missing, but just another thing to add to the "list of **** to fix." Just got back from up north last night, so I'll be fixing her tonight

Any ideas on the "missing" situation?

Syndacate

You're positive that that's the stock .bin file?

Forty04

yessir. I may try a virgin p28 to see if that changes anything

Forty04

Any other thoughts?

Forty04

bump

turbodelsol3

distributor, my buddy did his swap and thats what it was

Forty04

What exactly was the issue with the dizzy?

Mine is a new (re-man'd) z6 dizzy, new cap, rotor, plugs, wires.

Forty04

No one has any ideas?

Forty04

bump

Forty04

Does anyone have ANY possible ideas as to why this might be. Even basic suggestions are welcomed, maybe I overlooked somethign!?

sicones

do you know anyone with a z6 dizzy you can swap with just to see, did you set the timing right (with a light)??

Forty04

Its got a z6 dizzy on it, with the rywire dizzy conversion harness so that it hooks to my OBD2b engine harness

Could the timing being off just slightly cause this? My el-cheapo light crapped out on me before I could finish setting timing. I know its very close, but most likely not dead nuts

H22a T13

Check out your tps, the potienometer could be worn out.

sicones

does the Y8 dizzy fit the Z6??? not sure, you should check it out

Forty04

It does fit, but barely. It only holds on by one bolt/flange, doesn't exactly seem "safe" to me..

TPS reads normal

Forty04

ALright, I got the timing set finally at the missing in Low rpms is gone.

Now, it does still miss a bit at high rpms.


I dont think i mentioned this before, but since the z6 didnt come with an alternator or power steering, I had to use those things from my y8. Which means that I had to use my y8 crank pulley to make them work

Is the y8 crank pulley on the z6 motor causing me to miss slightly??

sicones

I doubt the timing marks are different, but the Z6 and Y8 do have some kind of timing difference..

Forty04

I'm not sure of the specifics.. It is however timed to z6 specs, with a timing light. But, with the y8 pulley on there, the dizzy has to be moved all the way advanced in order to fit into z6 timing specs


Could it be a mapping thing? I mean my tuner but a 100% stock z6 map on the chip, but I don't konw.

sicones

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Forty04 &raquo;</TD></TR><TR><TD CLASS="quote">But, with the y8 pulley on there, the dizzy has to be moved all the way advanced in order to fit into z6 timing specs
</TD></TR></TABLE>

that doesn't sound right, maybe you should get a Z6 pulley

Forty04

I actually have one, the problem is that I dont have a z6 alternator or power steering setup. The y8 pulleys for that stuff stick out too far so the belts would be spinning at an angle, and that can't be good.

*sigh*

I suppose I need to pick up a z6 alt and ps, and slap it all on there eh?

Forty04

A buddy of mine as the alternator, and the ps pump, but no bracket for the pump.


Does anyone know whether or not the bracket on my OBD2 ps pump will work with an OBD1 ps pump??

sicones

forget switching that stuff, put the Z6 pulley on with no accessories, time the engine ASAP and put the Y8 pulley back on when your done (run the engine off just the battery for a minute), and there are OBD issues with the P/S pump fittings...

for 2 engines and cars that are supposed to be similar...there sure as hell different

Forty04

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sicones &raquo;</TD></TR><TR><TD CLASS="quote">forget switching that stuff, put the Z6 pulley on with no accessories, time the engine ASAP and put the Y8 pulley back on when your done (run the engine off just the battery for a minute), and there are OBD issues with the P/S pump fittings...

for 2 engines and cars that are supposed to be similar...there sure as hell different </TD></TR></TABLE>

haha, You can say that again! The next time someone says "they're exactly the same," they're getting slapped

Thats a great idea about timing it with the z6 pulley, then putting the other one back on. However, won't that just put me right back to square one?

I guess I'm confused about the relationship of the crank pulley itself to the rest of the motor. Obviously it spins with the crank, and keeps the ps and alt working, but as far as how it relates to timing (other that the markings) I'm lost...

-I have to turn the z6 dizzy all the way advanced for the timing to be correct while running the y8 pulley. Lets say I put the z6 pulley on there, set the timing, and my dizzy ends up right in the middle. Now, when I put the y8 pulley back on, won't that just throw everything back out of whack?