LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Stupid EGR flow Code

Thread Tools
 
Search this Thread
 
Old Jul 25, 2009 | 12:06 PM
  #1  
Captainofiron's Avatar
Thread Starter
TECH Fanatic
iTrader: (1)
 
Joined: Apr 2006
Posts: 1,687
Likes: 0
From: New Mexico
Default Stupid EGR flow Code

Well a couple weeks ago when I was driving to work this morning, I was going about 60 in 6th gear, the rpms were low and BOOM, yellow light.

Well about a week ago it popped on me in the afternoon so I swung by Autozone and they scanned it for me and the code that came up was P0400 EGR flow malfunction. and it was the same code today.

well when I first put long tubes on my car I would get this code a lot when I would run WOT with the headers open, but I havent had this code since.

I am guessing that maybe something worked loose. Since I recently moved to New Mexico and the roads here SUCK, feels like I am driving on a highway on the bump strip on the side emergency lane. LOL

So I checked and the vacuum lines to the EGR valve and Solenoid and the line from the solenoid to the valve was cracked, so I superglued it together and put a hose over that, so then again the service light came on.

So finally I pulled the lines and they werent leaking and then I noticed the solenoid wasnt seeming to be working, so I replaced it, and still warning light, so I pulled the EGR and it was full of carbon deposits and was very easy to operate so I checked and the diaphram was leaking, so I replaced it and STILL warning light.

So now I am down to the EGR pipe..

well anyways, you guys have any ideas, Ill probably get into it later today when it cools down.
Reply
Old Jul 25, 2009 | 12:45 PM
  #2  
FlamingChicken's Avatar
TECH Enthusiast
iTrader: (2)
 
Joined: Apr 2005
Posts: 546
Likes: 0
Default

usually flow is a clog in the egr port/line somewhere. code for lift is generally the valve.
Reply
Old Jul 25, 2009 | 03:10 PM
  #3  
Captainofiron's Avatar
Thread Starter
TECH Fanatic
iTrader: (1)
 
Joined: Apr 2006
Posts: 1,687
Likes: 0
From: New Mexico
Default

you know, I never even thought to check for carbon clogging the passages.

thanks for the thought.
Reply
Old Jul 25, 2009 | 05:21 PM
  #4  
FlamingChicken's Avatar
TECH Enthusiast
iTrader: (2)
 
Joined: Apr 2005
Posts: 546
Likes: 0
Default

youre welcome. hondas are notorious for clogged egr passages, especially the v6s. have to pull the intake and drill the carbon out they get so bad. good luck finding the problem.
Reply




All times are GMT -5. The time now is 01:55 PM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-1
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-2
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-3
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-4
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-5
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-6
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-7
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-8
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-9
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