C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1985 Corvette misfires

Thread Tools
 
Search this Thread
 
Old 06-09-2019, 11:03 AM
  #1  
wardie
Racer
Thread Starter
 
wardie's Avatar
 
Member Since: Mar 2017
Location: Canfield Ohio
Posts: 296
Received 13 Likes on 11 Posts
Default 1985 Corvette misfires

I changed out coil, cap, rotor and Delco wires. New R 43 TS plugs. Car runs worse after changing out parts? notice two plugs insulators are glazed and white remaining plus have a reddish tint to them. I am suspecting two injectors are stuck open.

Do I have to pull the intake runners to get the injectors out?
Old 06-10-2019, 05:50 AM
  #2  
Red86Z51
Melting Slicks
 
Red86Z51's Avatar
 
Member Since: Mar 2003
Location: Indianapolis IN
Posts: 3,472
Received 444 Likes on 322 Posts
Finalist 2020 C4 of the Year - Unmodified
C4 of Year Finalist (stock) 2019

Default

Originally Posted by wardie
I changed out coil, cap, rotor and Delco wires. New R 43 TS plugs. Car runs worse after changing out parts? notice two plugs insulators are glazed and white remaining plus have a reddish tint to them. I am suspecting two injectors are stuck open.

Do I have to pull the intake runners to get the injectors out?
Yes.
Old 06-10-2019, 10:12 AM
  #3  
VikingTrad3r
Oil Producer
Support Corvetteforum!
 
VikingTrad3r's Avatar
 
Member Since: Apr 2014
Posts: 8,705
Received 2,262 Likes on 1,446 Posts

Default

order gasket kit from rock auto very cheap. should have some rubber vac line on hand as u will most likely breal some and u pur the broken ends into the rubber ends. 5/32 i think it was. double chexk though.

and get the right size torx. i *think* it was t40.
Old 06-10-2019, 01:54 PM
  #4  
coupeguy2001
Le Mans Master
 
coupeguy2001's Avatar
 
Member Since: Sep 2006
Location: Phoenix AZ
Posts: 6,041
Received 144 Likes on 106 Posts
2021 C4 of the Year - Modified Finalist

Default

it should run better!
firing order 18436572.
Sometimes while changing plug wires, you can get the 5 and 7 mixed up....
Old 06-12-2019, 09:01 AM
  #5  
wardie
Racer
Thread Starter
 
wardie's Avatar
 
Member Since: Mar 2017
Location: Canfield Ohio
Posts: 296
Received 13 Likes on 11 Posts
Default

thanks to all who responded. Firing order with regards to plugs wires is correct. I have two spark plugs whose insulators are bright white and glazed I'm thinking I have two injectors stuck open? dumping gas into cylinder plus the snorkel is ripped. I'll replace snorkel and dump some Sea Foam into vacuum port of brake booster while running and see if I can get the two injectors to work properly.

Get notified of new replies

To 1985 Corvette misfires




Quick Reply: 1985 Corvette misfires



All times are GMT -4. The time now is 09:37 PM.