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350 question, buying l98 iroc. Help

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Old Jul 10, 2006 | 12:18 AM
  #1  
xlwhellraiser's Avatar
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From: colorado
Car: 1992 Trans/am convertible
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: 2.73 drum WS6
350 question, buying l98 iroc. Help

Hi, I found 89 iroc with l98 and T-tops with disc brakes for 4grand.

I test drove it today, and the pedal seemed very lite. Like it felt like a pedal on my corrola. The previous two firebirds I had (89 TBI and 79TA) both had very firm pedal. The car felt responsive and it ran good, but the pedal was very light.

Now, this car has 69K miles on it. I plan on getting the compression checked and have other stuff checked by a shop.

Oh, the oil pressure was between 30-60PSI almost the whole time. It ran very cool as well.

I just need to know why the feathery pedal.
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Old Jul 10, 2006 | 12:30 AM
  #2  
rik89gta's Avatar
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From: CHICAGO
Car: 89 FORMULA 350
Engine: 5.7 L98
Transmission: 700R4
Axle/Gears: 9 BOLT/ 3.27 GEARS
What pedal are U talking about? The brake or throttle? If its the gas, its probablly got a semi loose throttle cable. It might just be a little loose at the throttle body. Either that or the cable is stretched from the gas pedal being repeatedly stomped to shizzz! How does it respond to part throttle cruising?
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Old Jul 10, 2006 | 12:35 AM
  #3  
1989GTABlown632's Avatar
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From: PA
Car: 1989 Pontiac Firebird Trans-Am GTA
Engine: Blown 632 CID with Nitrous
Transmission: TH400
Axle/Gears: 4:10
If your talking about the gas pedal, the spring on the throttle body is weak from use, it happened in mine on the stock twin 48mm to the point where sometimes when i came to a stop it would stay open a crack and keep the car reving at 1500 rpm. I would have to tap the gas pedal real quick to close it completely. Just get a carb throttle return spring and you should be good to go.
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Old Jul 10, 2006 | 01:27 AM
  #4  
xlwhellraiser's Avatar
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From: colorado
Car: 1992 Trans/am convertible
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: 2.73 drum WS6
Its tpi. and yes, its the gas pedal. Should a car with 70k miles have this problem.
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Old Jul 10, 2006 | 02:11 AM
  #5  
fire350tpi's Avatar
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From: Middleboro, MA
Car: 1988 Pontiac trans am/gta
Engine: 350
Transmission: 700r4
Axle/Gears: 3.23's
i wouldnt rule it out, myn has a double return spring on it ( 89,000)

Plus after a afew years things tend to wear out, not abnormal
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Old Jul 10, 2006 | 02:41 AM
  #6  
xlwhellraiser's Avatar
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From: colorado
Car: 1992 Trans/am convertible
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: 2.73 drum WS6
Aha, I see.

I am torn between few cars, gosh I never thought buying a car would be this hard. This way around I am doing my research, and knowing alot about third gens this time around helps a bunch.

Thanks.
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Old Jul 13, 2006 | 12:55 PM
  #7  
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From: Tulsa, OK
Car: 1991 Pontiac Trans Am
Engine: 350 HSR, Cam, ignition, headers
Transmission: 700R4
Axle/Gears: 3.23
wait you said it had ttops with an l98? i'm pretty sure that there weren't very many if none that came with an l98 and ttops. it doesn't sound like is originally an l98. is it? might want to check that out
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Old Jul 13, 2006 | 02:17 PM
  #8  
CC's Avatar
CC
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From: Chicago, IL
Car: 1989 Trans AM GTA
Engine: 5.7 TPI - Stock
Transmission: 700R4
T-top was an option on '87-'89 L98 350 TPI Iroc Z28. I have a 1989 Iroc Z28 with L98 VIN code "8" with T-tops.

Originally Posted by cammed91
wait you said it had ttops with an l98? i'm pretty sure that there weren't very many if none that came with an l98 and ttops. it doesn't sound like is originally an l98. is it? might want to check that out
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Old Jul 21, 2006 | 07:52 PM
  #9  
darkage's Avatar
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From: Bethlehem, pa.
Car: 1990 camaro iroc-z
Engine: 5.7 TPI
I have a 90 iroc-z, it was "produced" in 89 to beat the 1990 "IROC" tag deadline ... but its still a titled, 1990 ... also with t-tops, fully loaded ... so depending on your "years" ... "1990" was the last release of this car. And from my own research .. it is a pretty rare car, under 3000 ... number could be lower ... can't remember exactly .. i'm sure someone will correct me if i'm wrong.
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