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help?

vette_girl

Member
Joined
Oct 4, 2006
Messages
5
Location
Ja, Fl
Corvette
1995 White coupe
i just want to get help on why my car doesn't work. i just want to talk to some knowledgeable people about corvettes. will someone please help me? my '95 dies as soon as it gets to operating temp (190), then just coughs and spits until it cools down. for reference, it's a 383 (stroked) and built pretty well. 12.23 on just the motor (low 11s on the bottle). one guy says it may be the opti-crap, i just want to verify before i spend the money to get it changed. help??? lil_bit_kittykat@yahoo.com it's an lt-1 block, a 236/242-561 cam with fully ported and polished lt-4 heads and intake, true dual hookers to 3" tubes back to 2 stage flowmasters. i don't know if that matters.

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angela
 

XLR8

Gone but not forgotten
Joined
Jun 23, 2004
Messages
6,662
Location
Mississippi Gulf Coast
Corvette
2003 AE Convertible, 1998 LCRM Convertible
Angela,

Sorry I can't help with your issue, but the nice thing about this site is that someone will come along that can. Check back here throughout the day and this evening and you should have some useful replies.

Good luck with it!
:w Jane Ann
 

Rob

Site Administrator
Staff member
Administrator
Joined
Sep 16, 2000
Messages
13,593
Location
New Hampshire
Corvette
1990 Corvette ZR-1
Moving from the Site Help and Feedback forum to the C4 Tech forum....
 

jmccloud

Well-known member
Joined
Feb 1, 2003
Messages
694
Location
Maryland
Corvette
1995 White Coupe LT-1 Auto
Running rough when warmed up

Could the water pump be leaking as the engine warms and builds pressure? The pump is just above the Opti and could be spraying the high voltage wires with coolant causing shorting. There may be whisps of smoke or drips on the ground. But a careful exam once warm may be necessary to see any evidence of a leak (the coolant will evaporate very quickly unless there's a lot of it).
Take care to avoid the moving or hot parts.
Good luck.
 

vetteboy86

Well-known member
Joined
May 26, 2003
Messages
2,760
Location
IN
Corvette
1986 Black "Indy 500 Pace car replica"
Do you have a scan tool or anything of the sorts? Is the service engine light coming on? How specifically does it die around 190?
 
A

AIRBUS

Guest
Do you know how to check the codes? That's your first priority.

Then...in the guessing area, assuming you haven't checked the codes, your problem sounds like one or more plugged catalytic converters. (I've got first hand experience there, and it's fairly common on these Vettes.)

Do a search on "back pressure", "exhaust pressure", "pressure test" and any other combinations you can think of to see what you can pick up here on the forum.

But again, learn how to check those codes. (Are you mechanically inclined?)

If you're into doing your own repairs, you MUST get the Factory Service Manual. Don't settle for Haynes, Chiltons, or any of that other junk.

Keep us posted on where this takes you. Good luck.
 

vette_girl

Member
Joined
Oct 4, 2006
Messages
5
Location
Ja, Fl
Corvette
1995 White coupe
wow. you guys rock! thanks, vetteboy, your setup is almost the same as mine with the stroked 383. i'm not leaking anything and i've checked the codes, the car is just being stupid. i took it to HP performance and tony says it's probably just the opti-crap being an *******. i called the chevy dealer and tom said the same thing so you guys are right, i'm just gonna have him change it out and redo the nitrous and MSD+6 so it will all work the way it was in hawaii. 11.63@126 ain't bad for a white girl lol!
 

vette_girl

Member
Joined
Oct 4, 2006
Messages
5
Location
Ja, Fl
Corvette
1995 White coupe
and airbus, no. i'm strictly an owner/driver. thanks for asking, but i'm about as mechanically inclined as a standard golden retriever. i'm a great gofer, ask me for a 10 mm wrench and i'll get you one but beyond that i'm pretty much lost. i can get you a beer, though ;-)

angela
 

vette_girl

Member
Joined
Oct 4, 2006
Messages
5
Location
Ja, Fl
Corvette
1995 White coupe
ewwwwww! vetteboy, pass on the 2400 stall, you're wasting money. go with the 3600 purple one, it will still engage at about 2200 rpm unless you really stomp on it. trust me on this one, i run a stroked 383, punched/decked bottom, ported/polished LT-4 top end, BBK throttle body, fully open true dual exhaust, 150 shot of nitrous and all the roller and titanium goodies, a 400 crank and a 236/242 - 561 cam. i'm pushing 790 HP at the flywheel, probably 610 RWHP on the raptor 4L60E with the 3.07:1 gears in back on M/T street slicks, but she's still streetable (when she cooperates lol). i just have to get 3:75 gears and she'll be in the 10s ;-)
 

BLACKTALON

Well-known member
Joined
Sep 12, 2005
Messages
130
Location
N.C Greensboro
Corvette
1994 ADMARIAL BLUE Z-51 COUPE
ewwwwww! vetteboy, pass on the 2400 stall, you're wasting money. go with the 3600 purple one, it will still engage at about 2200 rpm unless you really stomp on it. trust me on this one, i run a stroked 383, punched/decked bottom, ported/polished LT-4 top end, BBK throttle body, fully open true dual exhaust, 150 shot of nitrous and all the roller and titanium goodies, a 400 crank and a 236/242 - 561 cam. i'm pushing 790 HP at the flywheel, probably 610 RWHP on the raptor 4L60E with the 3.07:1 gears in back on M/T street slicks, but she's still streetable (when she cooperates lol). i just have to get 3:75 gears and she'll be in the 10s ;-)
Just wondered how you knw so much about motors but cant find a problem with a opti!!!:confused That should be the first thing to check!!!
 

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