Finally drove the Z.. But have issues>>
 

the Z drives GREAT when it wants.. I filled it with coolant today (using my current hoses until I get the others to install)

so I was driving around town, thent he car stumbled, back fired (pop) and died. It started right up running like crap.. I got it home (not too far) shut it off, popped hood and ooked aroufn for vacuum lines off etc.. nothing, started it up, runs fine..


I got my scan tool out and hooked it up. seemed fine.. then when it stumbled again I noticed something.. Left BLM was aroud 132, Right BLM was at 160.. I then noticed the right O2 was solid at 0v.. it would go to .45 with slight throttle but the Right injector pulse width was at like 10-12ms when the left was 4. then like magic, it cleared up and all was fine..

Looking over the whole scan, the Left and Right BLM, Injector pulse width, and O2 voltage track almost perfectly, but those few instances it get skewed.. now I guess there is a possibily of a sticking injector, but to stick then not stick? my other thought is a bad Passenger side O2? maybe intermittent?

Anyone one else have suggestions? Oh yeah, not DTC set..

Re: Finally drove the Z.. But have issues>>
 

I forgot to add that when it is acting up it feels like it is loading up on fuel, then all of a sudden it is fine again. Not sure if that helps, I am kind of stumped at the moment

Re: Finally drove the Z.. But have issues>>
 

dont know if this will help jeff, but here goes . you might have a piece if something thats floating around in the fuel rails. i couldnt believe the trash that came out of the rails.you might also have a map sensor hose that is collapsing. i tried to cut one out of a hard rubber line without any extra line s.so it wont collapse . might ck and cleaN THE IAC if that stks . but it might be an o2 sensor or the fuel rail on that side wth the funky readings . hope this helps .

Re: Finally drove the Z.. But have issues>>
 

Being it is the Right side only.. it has to be there, not any of the single sensors..

it is possible there is something in the rail I guess, but I am thinking of swapping the O2 first.

Re: Finally drove the Z.. But have issues>>
 

that sounds like a good plan. are you going to swap them or do you have a spare?

Re: Finally drove the Z.. But have issues>>
 

I will probably try to pick one up tomorrow.. they probably both should bereplaced, but I will just do the one for now

Re: Finally drove the Z.. But have issues>>
 

I have found thT REPLACING THEM EVERY 40K KEEPS THINGS ALOT CLEANER .

Re: Finally drove the Z.. But have issues>>
 

Jeff,

I'll send you a scan I did today. All of a sudden BLMs are in the 115 range which is pegged at the bottom. Its both Rt and Lft. O2s track with each other although one seems a bit lazier than the other. Wonder if its a notchy TPS? Or exhaust leak, but on both sides?

Re: Finally drove the Z.. But have issues>>
 

Just some thoughts Jeff.

If you have the OEM injectors in theory they can't stick...according GM(?). I don't see why not & I don't see why they can't unstick themselves and then stick again....the disc has to keep the junk inbetween the pintal and the disc untill it pulverizes it enough to pass the holes in the disc. JMHO here:o

Also, when the car acted out, do you think it was lean or rich? Smell anything? Reason I asked is that maybe some injectors coils are shortting intermitantly....when my OEM injectors shorted badly they presented some rich BLM & Inte #'s, but the plugs & exhaust said dead lean along with the O2 readings on the worst bank.

Lastly, this thought crossed my mind & it's a dark one indeed.....quad driver issue....I hope not as ours are nla...Oh, just thought of this: how's the injector wiring harness?....I'll shut up now before I think of anything worse.:redface:

:cheers:
Tom

Re: Finally drove the Z.. But have issues>>
 

Tom, injectors are replacements.. I bought the FIC rebuilts, I have already received and email from Jon at FIC (great customer service). he said the same about injectors sticking and unsticking, rare to happen. but offered to send replacements if needed. I am really thinking it is the O2, in open loop it seemed fine from what I remember. being it happens on one side and not the other leads me to think it is a bank problem..

I don't think it is a quad driver, I thought those were primary and secondary, if so, then I would see it on both sides, not one in my scan..

Re: Finally drove the Z.. But have issues>>
 

Yea on the Q-driver....pulled that one from you know where.

If you think it's the O2, switch'em & see if it follows...if not then I gotta suspect an injector(s) maybe.

My thinking is that ya have to mechanically verify what each O2 is telling you about the results of combustion in that bank, pull the plugs & or stand behing the car & sniff the exhaust when it acts out....gotta pass the smell test.:mrgreen: JMHO.

Re: Finally drove the Z.. But have issues>>
 

An intermittent O2 sensor is what eventually prompted me to buying a scanner in the first place. As for O2s being intermittent, I have had one that would go to zero volts at about 3100 rpm...sometimes. PW jumped waaaaay up, compared to the normal side, and black smoke would pour out of that side at WOT. Next time out, it might be fine, or it might crap again at some point.

So, it can happen that way. However, a loose or intermittent O2 connection might give you the same test results. Swapping the sensors** to see if the problem tracks seems like a good approach.

**Would it make sense to build a wire harness that would allow you to simply cross-connect the O2 (connect the left O2 to the right ECM harness, etc) and avoid having to acutally swap them??

P.

Re: Finally drove the Z.. But have issues>>
 

Paul,
I'd be more concerned over the issues that could cause more than the inconvenience of swapping them.

Re: Finally drove the Z.. But have issues>>
 

Installed new O2, apparently the old one was not plugged in all the way.. I changed it anyway.. Went drive it and I had no clutch pedal, the master I installed was sticking.. swapped that and just drove it again.

I am stumped/annoyed. the O2 problem I saw is fixed but the loading up stumble and die is still there.. I don't see anything in the scan that could cause it..

It seems to be there slightly in Open loop, worse in closed loop ( to the point of the car dying.. not sure where to go next..

Strangest thing.. car is running like crap.. pull it on my lift shut it off. wait 10sec, start it.. runs/idles fine..

Now here is what I changed over the winter:
Plugs
Wires
Injectors
BIN in PROM
used a different plenum and IH but I don't think there is an issue there..

Things I am guessing it could be:
Ignition module?
Coil Packs?
BIN IN PROM

Re: Finally drove the Z.. But have issues>>
 

Jeff,

Give me a call.

Re: More Foreign Leaders Express Their Condolence to China on the Earthquake Disaster in Sichuan (XVI)
 

Get this ******* turd outta here. Jeez, maybe this would n't happen if we had more items required upon signing up here. Just my 2 cents. Course you already know how i feel.

Re: Finally drove the Z.. But have issues>>
 

WTF.
We need to register with a real working phone # with matching address before we allow anyone to post,this way we know where he lives and can pay him a visit.

Jeff, i would try the prom first,then move to coils.
If it's ignition $$$$$$ module i would figure out a way to use LS1 coils.

Pete

Re: Finally drove the Z.. But have issues>>
 

Pete,

I swapped the PROM last night, I goign to use the OEM AYBK that I have.

I ordered coil pack too, I figure I will pull the plenum tonight or tomorrow to swap them (should have them this week) and see what that does. after reading RogerZr1's post, mine issue sounds the same, bbut my car dies, makes me think it might be coils

Re: Finally drove the Z.. But have issues>>
 

jeff does it die after the car get up to operating temp? if so it could be coils .heat over time kills them .good luck

Re: Finally drove the Z.. But have issues>>
 

Fixed.. bad PROM

put in a Stock AYBK works fine..

Now to disable cars..

Re: Finally drove the Z.. But have issues>>
 

go get em, thats the real fun dont think old car is fast. till they get heat burns when ya go buy them:D