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Z issues. plz help.

Old Feb 4, 2005 | 08:01 PM
  #1  
thirdgenhero's Avatar
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From: Littleton, Colorado
Car: 1984 z28
Engine: 305 H.O.
Z issues. plz help.

here is the problem. when im at WOT, its fine off the line but as soon as it goes into 2nd and third, it bogs way down. its weird its only right at the shift and it hasnt always done this just within the last couple of days. i have also noticed white smoke on cold start ups, could this be related? any help would be appreciated. thanks alot.
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Old Feb 4, 2005 | 08:11 PM
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ridecamro's Avatar
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From: MN
Car: 91 rs
Engine: 250
Transmission: 700r4
Axle/Gears: stock??
white or blue smoke make sure cause thier easly confused
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Old Feb 4, 2005 | 08:12 PM
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From: Littleton, Colorado
Car: 1984 z28
Engine: 305 H.O.
definatley white, no question.
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Old Feb 5, 2005 | 06:28 PM
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From: Littleton, Colorado
Car: 1984 z28
Engine: 305 H.O.
can anyone help?
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Old Feb 6, 2005 | 11:32 AM
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ZZ28ZZ's Avatar
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From: Austin
Car: 82 Z-28
Engine: 383 TPI
Transmission: 700R4
You may be running out of fuel at WOT. Checked/replaced the fuel filter recently?
White smoke is from water. If it goes away after 15-30 mins of driving, it's probably just condensation in the exhaust system.
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Old Feb 6, 2005 | 04:12 PM
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From: Littleton, Colorado
Car: 1984 z28
Engine: 305 H.O.
no i havent checked the fuel filter, but i have a new one sittin in the garage. i also know that the fuel pump is pretty new. so that shouldnt be a issue, well i guess ill go put that filter in...thanks!
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Old Feb 6, 2005 | 04:59 PM
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From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
all through the power range of first gear the car performs right? form idle to say 5k in first gear the car will go?

If it runs at 5k in 1st then it should in second also, its not a fuel filter problem. but ifs it bogs down then.... it could be a list of drivetrain/iginition/fuel problems. Hope you figure it out....
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Old Feb 6, 2005 | 06:34 PM
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From: Littleton, Colorado
Car: 1984 z28
Engine: 305 H.O.
yeah, all through first its ok, but then right after it shifts second and third it bogs, then it comes back....i also have a kinda ruff idle...but i know my timing is ok, so i know its not that...im just tryin to figure it out.
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Old Feb 6, 2005 | 06:36 PM
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From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
unless your tranny or other drivetrain parts are screwd up, a problem that exists in 2nd and 3rd gear, should exist in first gear as well. this has me stumped,
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Old Feb 6, 2005 | 07:07 PM
  #10  
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From: Littleton, Colorado
Car: 1984 z28
Engine: 305 H.O.
could it be a carb issue? cause i am fairley new to my car but i love it, and am tryin to learn as much as possible. i was reading the tech article on the ccquadra jet tuning, is this a easy thing to do, or does it require alot of skill that a first timer wouldnt be able to do? cause i know im running alittle rich, maybe its dumping too much gas in there?
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Old Feb 7, 2005 | 02:27 AM
  #11  
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From: Littleton, Colorado
Car: 1984 z28
Engine: 305 H.O.
anyone?
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Old Feb 8, 2005 | 10:08 AM
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From: Austin
Car: 82 Z-28
Engine: 383 TPI
Transmission: 700R4
The fuel that's already in the float bowl is sufficient to get you thru 1st gear @ WOT. Then when you shift to second, if the fuel filter is restricted, you'll be taking more out of the float bowl than is coming in. That will create a serious boggg.

If you're running an inline filter, you can disconnect the fuel line at the carb and stick it into a glass container of some sort. Run eng. for a few seconds. I can't tell you exactly what the flow rate should be, but it should fill a 16oz bottle in just a few seconds. Do this on a cold eng if you can, just in case you spill some fuel.

If you only have the fuel filter that's at the carb inlet, you'll just have to replace it to check it.

If it's running rich enough to bog @ WOT, you'll be seeing a lot of black smoke out the tail pipe. I've never seen a q-jet do that.

Since this is a new problem, I doubt if it's an adj issue.
Q-jets are known for NOT needing frequent adjustments.
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