C4 Vette Registry - The Best Resource on the Net for C4 Vettes! C4 Vette
Forums -> C4 Engines
Not Logged In! Login or Register!  Users Online: 9 / Help 
Features   CoolC4 Corvette Parts Auctions

Supporting Vendors
Volunteer Vette Products
VetteBookStore.com
Bair's Corvettes

C4 of the Month
None Current
Enter Yours Today!
Vanity Plates
GOT BAIL
Red LT4
Featured Links

Buy Now
Corvette Masterpieces: Dream Cars You'd Love to Own (Hardcover)
Corvette Masterpieces: Dream Cars You'd Love to Own (Hardcover)


Motor Trend - $5 for 12 issues.
Motor Trend
Only $5 for 12 issues.


Corvette from the Inside
Corvette from the Inside


Corvette Magazine - $19.99 for 8 issues
Corvette Magazine
Only $19.99 for 8 issues



| Hide Signatures and Profile Pics

 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
4/11/19 8:09pm - Original Message: '1987 L98 w/ automatic stalls in traffic, and refires later.'
hncook51
Standard Member
- Send Private Message


Marietta, GA - USA

Vette(s):
1987 Base Coupe Automatic

Joined: 4/8/2019
Posts: 5
Hey guys,

I know this issue has already been addressed on other threads, but I'm at my wits end with this car. I've replaced the EGR valve, fuel pressure diaphragm, fuel pump, fuel pump relay, fuel pressure regulator, fuel pump cooling relay, fuel pump strainer,  MAF sensor, TPS sensor, ECC, the PROM chip that goes with it, oxygen sensor, vacuum lines, spark plugs and wires, distributor cap, rotor, ignition module, and vacuum lines. I'm tired of dumping money into this car that does run better, but won't stop breaking down.

Thanks!


____________________________________
 Reply Reply  Quote Reply w/Quote
 
Support C4VR!
Suport our advertisers
4/12/19 9:46am - Reply: 'Re: 1987 L98 w/ automatic stalls in traffic, and refires later.'
aldocar
Standard Member
- Send Private Message


Westfield, MA - USA

Vette(s):
1988 Red Convertible just purchased on Nov 2016.

Joined: 12/3/2016
Posts: 68
Wow.  Did you change the fuel filter?  I did not see it on your list. The repair manual listed the fuel filter as an item to look at when engine stalls.  I am sure a more knowledgeable member will help.
Good luck!!!


____________________________________
 Reply Reply  Quote Reply w/Quote
4/12/19 1:50pm - Reply: 'Re: 1987 L98 w/ automatic stalls in traffic, and refires later.'
hncook51
Standard Member
- Send Private Message


Marietta, GA - USA

Vette(s):
1987 Base Coupe Automatic

Joined: 4/8/2019
Posts: 5
Yep, changed the fuel filter a few months ago.

____________________________________
 Reply Reply  Quote Reply w/Quote
4/13/19 10:42am - Reply: 'Re: 1987 L98 w/ automatic stalls in traffic, and refires later.'
Adams' Apple
Standard Member
Moderator
- Send Private Message


Duncanville, TX - USA

Vette(s):
1985 Coupe-L98/Auto,Bright Red/Carmine. 1974 Coupe-L48/4speed, Medium Red Metallic/Black Deluxe.

Joined: 3/18/2009
Posts: 2123
Please give us a little more info on what the car is doing. Stalls and then restarts later is vague at best.
Did you replace the ignition coil also, since it is not on your list either. Fuel cap?  Checked the vapor & retune lines from the tank to the canister, along with the purge solenoid? If the tank is not venting properly, it can create a suction inside the tank that can keep fuel from flowing...


____________________________________
Joel Adams  
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"
 Reply Reply  Quote Reply w/Quote
4/13/19 11:47am - Reply: 'Re: 1987 L98 w/ automatic stalls in traffic, and refires later.'
hncook51
Standard Member
- Send Private Message


Marietta, GA - USA

Vette(s):
1987 Base Coupe Automatic

Joined: 4/8/2019
Posts: 5
When I start up the car and it's cold, it usually runs great, but after it's warmed up, and I get into slow speeds, such as approaching a stop sign or a red light, it will start surging, and eventually it will stall. It can't be restarted, requires a tow back home. I replaced the ECC and the PROM chip a few days ago, and that made it worse. It surged and stalled a few seconds after I started it up, when it was cold, before I could back it out of my garage.

____________________________________
 Reply Reply  Quote Reply w/Quote
4/13/19 8:33pm - Reply: 'Re: 1987 L98 w/ automatic stalls in traffic, and refires later.'
Adams' Apple
Standard Member
Moderator
- Send Private Message


Duncanville, TX - USA

Vette(s):
1985 Coupe-L98/Auto,Bright Red/Carmine. 1974 Coupe-L48/4speed, Medium Red Metallic/Black Deluxe.

Joined: 3/18/2009
Posts: 2123
Have you checked for any codes set when it stalls? Next time it does stall after starting, before you turn the key off, check for codes(once you turn the key off, the codes will disappear). A scan tool for non-OBDII capabilities is quickest, but assuming you do not have one, on your car, you'll need to jump the "A" and "B" terminals of the diagnostic link(under the driver side dash). With key ON, it will flash the "Service/Check Engine" light. Count the flashes. Codes will appear as slow flashes, then quick flashes. The slow flashes are the first number of the code, the fast flashes are the second number. For instance, a code 45 would be four quick flashes, followed by 5 slower flashes. Each code will flash 3 times, then the next code will flash. Once it has flashed all codes, it will start over again with the first code. If there are no codes, you will see code 12 flash repeatedly.
See if the ECM is seeing something that will shut the engine down....it will at least point you/us in the right direction.




____________________________________
Joel Adams  
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"
 Reply Reply  Quote Reply w/Quote
4/14/19 6:59am - Reply: 'Re: 1987 L98 w/ automatic stalls in traffic, and refires later.'
gonewild60
Standard Member
- Send Private Message


LAKE GROVE, NY - USA

Vette(s):
1988 Black with tan gut 1992 white with red gut

Joined: 4/14/2019
Posts: 2
So the car just shuts down or it stumbles and dies?
get an ohm meter and check each injector cold, then hot...  
I have found sometimes the resistance goes way up on faulty injectors, and the computer shuts down.
 Reply Reply  Quote Reply w/Quote
4/14/19 1:32pm - Reply: 'Re: 1987 L98 w/ automatic stalls in traffic, and refires later.'
hncook51
Standard Member
- Send Private Message


Marietta, GA - USA

Vette(s):
1987 Base Coupe Automatic

Joined: 4/8/2019
Posts: 5
It suddenly idles rough, then it dies.

____________________________________
 Reply Reply  Quote Reply w/Quote
4/14/19 3:21pm - Reply: 'Re: 1987 L98 w/ automatic stalls in traffic, and refires later.'
hncook51
Standard Member
- Send Private Message


Marietta, GA - USA

Vette(s):
1987 Base Coupe Automatic

Joined: 4/8/2019
Posts: 5
I've been using a GM code reader that I bought at Advance Auto parts that's set at the ECMAB position, and I can't get any codes out of it. I've noticed that when the temperature gauge gets to 150 degrees, I think the radiator cooling fans are supposed to come on by then, but they don't, and that's when it shuts off. Also, the fuel pump cooling relay makes a buzzing sound, whether it's hot or cold, but sometimes it doesn't buzz, and when it does buzz, 9 times out of 10 the car will stall. And when I have it in gear, and the air conditioning on full, it'll stall within 30 seconds.

|UPDATED|4/14/2019 12:21:25 PM (AZT)|/UPDATED|


____________________________________
 Reply Reply  Quote Reply w/Quote
 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
 Forums -> C4 Engines
(Moderator: Adams' Apple, Atchafalaya, eddie20890)
 

 
Official C4 Vette Registry Community:
Home | Forums | Email | Who's Online | Clubs | Events | Member Stats

Other Official C4 Vette Registry Areas:
Members | Research | Shop | My Account | About C4VR
 

Corvette is a registered trademark of the General Motors Corporation(GM) & Chevrolet Motor Division. Vette Registries, LLC is responsible for all site content (except for member submitted content or where otherwise noted) and does not claim or imply that Chevrolet or GM is responsible for Official C4 Vette Registry content. Vette Registries, LLC is independent from GM and is not affiliated with, sponsored or supported by GM.  Copyright/trademark/sales mark infringements are not intended, or implied and are in fact used to support GM, Chevrolet and Corvette

Official C4 Vette Registry content is Copyright 2001-2019, Vette Registries, LLC. Content may not be reused without written consent. All Rights Reserved. NS

Corvette (Vette) Model Years on this site: 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 30