PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

P0307

Thread Tools
 
Search this Thread
 
Old Dec 2, 2017 | 08:36 PM
  #1  
97TAsom's Avatar
Thread Starter
On The Tree
5 Year Member
 
Joined: Sep 2015
Posts: 159
Likes: 0
From: Cullman, Alabama
Default P0307

So I keep getting a SES light and I have a scan tool that will let me read codes, sensor information, and even chart this stuff. I have been charting a cylinder 7 misfire, about 105 misfires every 10 second seconds. It only misfires at idle and at cruising rpm. Anything more and it doesn't misfire. Also, the #1 cylinder reads as misfiring, but doesn't throw a code. I've changed plugs and wires, moved coil packs, checked the crankshaft position sensor, tested my injectors with 12v and cleaned them out with cleaner, checked compression, and checked the ground bolt on the back of the driver side head . None of that helped. 2 nights ago, at one point in an hour drive, every single cylinder misfired at least 10 times on different occasions. I am going nuts to figure out what this issue is. It doesn't misfire at WOT at all. Anyonehave any suggestions on what to do????
Reply
Old Dec 5, 2017 | 07:49 AM
  #2  
gagliano7's Avatar
TECH Addict
20 Year Member
Photogenic
Photoriffic
 
Joined: Aug 2005
Posts: 2,305
Likes: 126
From: Monroe,NY
Default

I had a similar problem idle and cruise miss, wot fine. Coil was bad.
Reply




All times are GMT -5. The time now is 08:20 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE