C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Misfire help needed

Old Jun 4, 2017 | 12:40 PM
  #1  
The New Guy's Avatar
The New Guy
Thread Starter
Cruising
 
Joined: Feb 2016
Posts: 14
Likes: 0
From: Wentzville Missouri
Default Misfire help needed

Changed the oil pressure sending unit (not working). Now my OP gauge works but terrible missfire from engine. Checked all plug wires, cap, etc. and cant see anything wrong. Suggestions? By the way fuel pump power supply was rerouted by BUBBA prior to my purchase.=if that makes any difference.
Reply
Old Jun 4, 2017 | 05:06 PM
  #2  
TimAT's Avatar
TimAT
Le Mans Master
15 Year Member
Liked
Loved
 
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Default

What year? HEI? Points? DO the basic stuff first- make sure all the plug wires are on the plugs and on the correct plug.

Get a spray bottle, mix up a few drops of dish soap and water, then with the engine at idle, mist the plug wires from the cap to the plugs. If there's a problem with the wires, it'll show up.
Reply
Old Jun 5, 2017 | 10:36 AM
  #3  
Easy Mike's Avatar
Easy Mike
Team Owner
Supporting Lifetime
20 Year Member
 
Joined: Jun 2000
Posts: 38,923
Likes: 1,482
From: Southbound
Cruise-In II Veteran
Default

Have you checked the computer for an error code?
Reply
Old Jun 6, 2017 | 12:20 PM
  #4  
gungatim's Avatar
gungatim
Burning Brakes
15 Year Member
All Eyes On Me
Liked
Loved
 
Joined: Apr 2008
Posts: 1,222
Likes: 93
From: shelbyville West Michigan
Default

figure out which cylinder is misfiring first. pull off wires one at a time if you can't tell by sound. then work backwards from that cylinder. plug, wire, cap, rotor, etc.
Reply

Get notified of new replies

To Misfire help needed



Thread Tools
Search this Thread

All times are GMT -4. The time now is 06:05 PM.

story-0
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-1
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-2
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-3
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-4
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-5
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-6
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-7
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-8
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-9
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE