V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

car sputters on highway HELP

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Old Jul 2, 2008 | 02:15 PM
  #1  
Teenfixing88RS's Avatar
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Joined: May 2003
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From: California
Car: 1988 Camaro RS
car sputters on highway HELP

so as im driving my car jerks ridiculously on the highway.

im talking full fledge.

it sputters in every gear when i reach apprx 3k on the rpm. (sometimes earlier)

The RPM's go haywire (7k to 2k back to 6) i cant drive this thing anymore

i dont know whats wrong with it.

ive checked all the sensors, change all of them just to be certain.

ill be driving and it will be fine for a few minutes then ill hit 3k and boom it stars jerking i hear the engine rattling (like when u **** into 5th from 1st) and a bit of grinding.

is my transmission going bad?

HELP please.

thanks guys.


its 88 rs V6 MPFI T5
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Old Jul 2, 2008 | 02:23 PM
  #2  
project89's Avatar
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Joined: Apr 2008
Posts: 10,401
Likes: 5
From: Utah
Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: car sputters on highway HELP

plug wires/plugs maybe ign module and pickup coil.id try the plug wires first though.

if u have a plug wire arching out it will make the car run like total crap+ the tach will bounce all over the place
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Old Jul 5, 2008 | 11:01 PM
  #3  
jrsrnr3's Avatar
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Joined: Mar 2008
Posts: 21
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Re: car sputters on highway HELP

You may have a vacuum leak and also check the fuel pressure, maybe the fuel filter might be pluged, fuel pump dying or the fuel pump relay might be bad.
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Old Jul 6, 2008 | 09:31 AM
  #4  
ScottieB's Avatar
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Joined: Jun 2006
Posts: 499
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From: Sherman, Tx - N. of Dallas
Car: Blue 89' RS
Engine: 5.7L
Transmission: 700r4
Axle/Gears: 3.42
Re: car sputters on highway HELP

i had a friend that had a dizzy that was going to poop, replaced that and it ran great
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Old Jul 6, 2008 | 12:12 PM
  #5  
Project: 85 2.8 bird's Avatar
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Joined: Jul 2001
Posts: 4,461
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From: BFE, MD
Car: 13 Ram 1500/ 78 Formy
Engine: 5.7 / 7.4
Transmission: 6sp / TH350
Axle/Gears: 3.55 posi / 3.23
Re: car sputters on highway HELP

what codes you getting, and how old is your clutch setup?
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