terrible vibrations
#1
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Location: illinois
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Car: 86' Z28
Engine: 5.0l w/ new cam
Transmission: TH-350
Axle/Gears: 4.10's
terrible vibrations
ok, yesterday after sitting in a parking lot i turned on my car and it started running very rough. it feels like it wants to bog of the line, theres a loss of power, feels like its miss firing, lower idle speed, and a very bad kinda lumpy jerk when i step on the gas even just a little bit. im thinking it migh be a bad o2 sensor or a clogged fuel filter. the car is a 86 z28 with a 305 tpi. any help would be greatly appreciated.
-Josh
-Josh
#5
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Re: terrible vibrations
ok, yesterday after sitting in a parking lot i turned on my car and it started running very rough. it feels like it wants to bog of the line, theres a loss of power, feels like its miss firing, lower idle speed, and a very bad kinda lumpy jerk when i step on the gas even just a little bit. im thinking it migh be a bad o2 sensor or a clogged fuel filter. the car is a 86 z28 with a 305 tpi. any help would be greatly appreciated.
-Josh
-Josh
A broken valve spring will exhibit the same symptoms. My engine broke a valve spring a few weeks ago and exhibited every symptom you just mentioned.
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Car: 85 Camaro
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Axle/Gears: No
Re: terrible vibrations
to me that just sounds a lot like a bad vacuum leak. does your cruise control work? Breaks feel normal? Check your PCV?
#9
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Re: terrible vibrations
The reason I wanted him to check his vacuum was because if a valve spring is broke, it'll throw off the valve timing in whatever piston it's affecting causing a massive vacuum issues. In mine, the gauge, even at higher RPM, never steadied out...it was always all over the place continually bouncing.
#10
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Car: 86' Z28
Engine: 5.0l w/ new cam
Transmission: TH-350
Axle/Gears: 4.10's
Re: terrible vibrations
sorry if this is a noob question but, how would i go aabout checking my vacuum? also there is quite a noticalbe tick at idle.
#11
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Re: terrible vibrations
TO check your vacuum you need a vacuum gauge. Then pull one of your vacuume lines from your carb/TBI/TPI, connect the gauge to the hose you pulled off, plug the other side and read what the vacuum number is. If it's bouncing everywhere, you've got a leak. If it's really low, you've probably got a leak. then rev the engine, if it's still bouncing everywhere, my guess would be that you have a valve problem.
#12
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Car: 86' Z28
Engine: 5.0l w/ new cam
Transmission: TH-350
Axle/Gears: 4.10's
Re: terrible vibrations
checked the vacuum to and its holding steady at 15 hg. ill try changing the fuel filter tomarro and see if that makes a difference.
#14
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Car: 86' Z28
Engine: 5.0l w/ new cam
Transmission: TH-350
Axle/Gears: 4.10's
Re: terrible vibrations
ok ill check for that. what would it mean if it were to be wet?
#16
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Car: 86' Z28
Engine: 5.0l w/ new cam
Transmission: TH-350
Axle/Gears: 4.10's
Re: terrible vibrations
i have driven in the rain but not very recently, i suppose melted snow could have cause the moisture.
#18
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Car: 86' Z28
Engine: 5.0l w/ new cam
Transmission: TH-350
Axle/Gears: 4.10's
Re: terrible vibrations
fuel filter = problem solved.
couldnt have done it without tgo, thank you
couldnt have done it without tgo, thank you
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