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Topic: LT1 STALLING , WHY ?

in Forum: C3 Engines


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LT1 STALLING , WHY ?

Posted: 4/22/08 2:25pm Message 1 of 10
WRAITH
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Franklin Square, NY - USA
Joined: 4/18/2004
Posts: 116
Vette(s): ' 76 Customized .Mid year rear window ( ' 67 style ). It has an '80 nose,'80 rear bumper , and a 76 hood . Also , I squeezed in a ' 94 Vette LT1 . Paint is a custom mixed BLACK with RED PEARL mixed in !
As you all know, I put  a '94 LT1 in my ' 76 . Well, up until now, it's been running like a charm . Today, out of no where , it started stalling . I'd come to light , the tach would start to jump all over the place and , nightie night ! It started , but not right up . Also wanted to stall as I was driving .
A few months back, I had the injectors replaced as they were clogged due to the engine just sitting . As I said, it's been running great , until now .
I haven't checked for any error codes yet . I wanted to run it by you guys, as maybe it has happened to someone else .
As usual, any help is appreciated !


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LT1 STALLING , WHY ?

Posted: 4/22/08 2:56pm Message 2 of 10
RADARB8
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Montesano, WA - USA
Joined: 9/27/2003
Posts: 1931
Vette(s): had a really nice one. sold it to a good friend. Purchased 2004 custom coupe in Feb. 2009 did not tell anyone here until August 2009. BAD I KNOW.
not much of a wrench head here but some of the things that are easy to over look are:  Change where you purchased gas, maybe water in tank.  lose ground  I know soon some one with the knowledge will help you out, my advise will cause more damage than good. good luck
Larry


LT1 STALLING , WHY ?

Posted: 4/22/08 3:22pm Message 3 of 10
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MikeMc71
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Tucson, AZ - USA
Joined: 10/7/2007
Posts: 341
Vette(s): 1970 White L-46 Air Roadster, 1971 White LT1 Coupe, 1971 Red Auto Air Coupe, 383 stroker, 430 HP, 2002 Millennium Yellow Auto Coupe

OH MAN....a can of worms, huh?

Where do you start? Dirty MAS? Clogged fuel filter? Electronic ignition module? etc.........etc........etc





LT1 STALLING , WHY ?

Posted: 4/22/08 3:44pm Message 4 of 10
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Check for trouble codes first....that will lead you in a specific direction, at least. If not, then I would start with fuel pressure, then spark. Can o worms indeed! We need more info to get started diagnosing the electronic stuff.
The tach jumping around might lead to a loose connection, or a failing ign. module, or...horrors...the opti-spark system...


Joel Adams
C3VR Lifetime Member #56    
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

LT1 STALLING , WHY ?

Posted: 4/22/08 4:00pm Message 5 of 10
WRAITH
Former Member
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Franklin Square, NY - USA
Joined: 4/18/2004
Posts: 116
Vette(s): ' 76 Customized .Mid year rear window ( ' 67 style ). It has an '80 nose,'80 rear bumper , and a 76 hood . Also , I squeezed in a ' 94 Vette LT1 . Paint is a custom mixed BLACK with RED PEARL mixed in !
If it's that opti-spark monster, I'll torch that car !! Censored I changed that before the car hit the road, which was , about, a year and a half now . The tach has been fine all this time . Even when the original engine was in , it behaved ! It pinned the guage then jumped around just before the engine died .
Other than this mystery, the engine runs great ! Shoot me now .... Wits%20End



LT1 STALLING , WHY ?

Posted: 4/22/08 6:44pm Message 6 of 10
VetteSpecialties
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Mounds View, MN - USA
Joined: 5/24/2007
Posts: 1031
Vette(s): 70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe
My wife's 93 LT1 had the same symptoms.  Finally it just died, so I had it towed to our store.  I was going to show a friend how it didn't run, and it started right up.  SIGHHHH.  After some diagnosing I changed the igntion module, which fortunately is not in the Opti-Spark, and it has been fine for a couple of years.  The module was expensive, but the dealer fee to test it was more, so I just replaced it.

Larry
VetteSpecialties2008-04-22 18:44:57


LT1 STALLING , WHY ?

Posted: 4/22/08 6:54pm Message 7 of 10
WRAITH
Former Member
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Franklin Square, NY - USA
Joined: 4/18/2004
Posts: 116
Vette(s): ' 76 Customized .Mid year rear window ( ' 67 style ). It has an '80 nose,'80 rear bumper , and a 76 hood . Also , I squeezed in a ' 94 Vette LT1 . Paint is a custom mixed BLACK with RED PEARL mixed in !
I will have to look into that !! Tomorrow , when I get a chance, I'll have the codes checked . It better show something ! Angry


LT1 STALLING , WHY ?

Posted: 4/24/08 1:51pm Message 8 of 10
WRAITH
Former Member
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Franklin Square, NY - USA
Joined: 4/18/2004
Posts: 116
Vette(s): ' 76 Customized .Mid year rear window ( ' 67 style ). It has an '80 nose,'80 rear bumper , and a 76 hood . Also , I squeezed in a ' 94 Vette LT1 . Paint is a custom mixed BLACK with RED PEARL mixed in !

Well, after pulling the codes, I now know the problem . Unfortunately, it's the death code ! Opti is the root of the trouble . Angry I've replaced it before, so I'm well aware of the upcoming nightmare Wits%20End. I have one on order, as well as the water pump ( didn't want to take a chance Wink ) .

So, to all that commented and helped, many thanks Clap Thumbs%20Up ........



LT1 STALLING , WHY ?

Posted: 4/24/08 7:01pm Message 9 of 10
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
I feel your pain...


Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

LT1 STALLING , WHY ?

Posted: 4/24/08 7:42pm Message 10 of 10
WRAITH
Former Member
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Franklin Square, NY - USA
Joined: 4/18/2004
Posts: 116
Vette(s): ' 76 Customized .Mid year rear window ( ' 67 style ). It has an '80 nose,'80 rear bumper , and a 76 hood . Also , I squeezed in a ' 94 Vette LT1 . Paint is a custom mixed BLACK with RED PEARL mixed in !

Most of the pain is in my wallet ! What I'd like to know is why it died with so few miles on it . I'd say, less than 3000 ! And , it was a new unit too .




in Forum: C3 Engines


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