have a question on an 85 z28
10-02-2006, 05:04 PM
#1
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Car: 85 z28 and a 97 ford ranger
Engine: 305 carb and a 4cyl pos
Transmission: both have a 5spd
have a question on an 85 z28
Ok i have replaced the plugs, wires, carb, fuel filter, fuel pump, cap, rotor, air filter, breather filter, pcv valve.... and stilll when i go to wot my car falls on its face... the thing is tho that if i am in neutral and do it is fine... now when i just start the car i can go for about a mile with it wide open and it be fine... then once the car starts to warm up that is when i have my issues... now i am looking at pulling of the cat and seeing if that is the problem... if any one has any ideas please help oh yeah i also checked for vacum leaks and cant find any...
10-03-2006, 06:50 PM
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Car: 85 z28 and a 97 ford ranger
Engine: 305 carb and a 4cyl pos
Transmission: both have a 5spd
its got a coil on the top of the distributor cap... i have not changed that out yet...
10-04-2006, 10:16 PM
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Car: 85 z28 and a 97 ford ranger
Engine: 305 carb and a 4cyl pos
Transmission: both have a 5spd
but if the coil went out would the car still even run....
10-04-2006, 10:40 PM
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Car: 85 z28 and a 97 ford ranger
Engine: 305 carb and a 4cyl pos
Transmission: both have a 5spd
now i did cut my cat off yesterday and took the air tubes off... that seemed to add a little power but did not bring back wot... now i did hear from one of the guys i work with that the carb i got from advance could be a problem and not set up properly...
10-05-2006, 06:16 AM
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Car: 1988 Trans Am GTA
Engine: 350 4BBL
Transmission: 700R4
Axle/Gears: 3.27
Most coils fail by starting to arc from the High Voltage coil to the metal part around it. As long as the engine's demand for voltage is low it jumps across the plug, under WOT the bad coil will arc internally instead.
You can test for this by leaving a timing light hooked up, with the trigger tywrapped down, on your windshield and taking it for a drive.
If the light does not go out at WOT, it's a fuel problem.
But, I think it's probably your "new" carb.
Most carbs leave the back barrels locked out until the engine is warmed up.
If the back barrels don't flow fuel, the engine will "go dead" when they open.
What kind of carb is it?
You can test for this by leaving a timing light hooked up, with the trigger tywrapped down, on your windshield and taking it for a drive.
If the light does not go out at WOT, it's a fuel problem.
But, I think it's probably your "new" carb.
Most carbs leave the back barrels locked out until the engine is warmed up.
If the back barrels don't flow fuel, the engine will "go dead" when they open.
What kind of carb is it?
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10-06-2006, 05:49 PM
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Car: 85 z28 and a 97 ford ranger
Engine: 305 carb and a 4cyl pos
Transmission: both have a 5spd
hey i just got back from my friends house who endded up being able to fix the car for me... it was the carb the secondaries on it would not open up... and the screws on teh bottom of the qjet were not tightened down so he took care of all that for me so now i am able to hit wot with no problems... other than the belt squell i have... that and now i found out the clutch to my fan is allso stuck so something i get to spend more money on but at least i can use the cars pottential... 
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