1996 Chevy Camaro Acceleration stutter, rough idle and OBDI

1996 CHEVROLET CAMARO
190,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
SBCHRISTO
  • MEMBER
  • 1 POST
A few days ago I was leaving my house when the engine started stuttering violently when I would accelerate at anything but a crawling pace. I nursed the car home and waited to take a look at it the next day.

Upon starting it the next day, it revved roughly to about 2.5k rpm and then eventually settled back to around 1k and I had the same stutter problem upon acceleration.

Today I took it upon myself to go pick up an OBDII reader and the codes read initially:
P0300 Random/Multiple cylinder misfire
p0155 O2 Sensor
P1406 EGR

I cleared the codes and disconnected the EGR (but left on the engine and it returned only the P1406.

So I have pulled the EGR and I am in the process of cleaning it up. It appears to be rather caked with carbon (see attached pic). Does this sound like the solution (clean and/or replace EGR) or should I be looking somewhere else first?

Thank you,
C. Weisman[img:8a8bd84e02]http://www.2carpros.com/forum/automotive_pictures/430376_EGR_1.jpg[/img:8a8bd84e02]
Nov 3, 2009 at 6:45 AM
Advertisement
Avatar
DOCFIXIT
  • ✓Experienced Mechanic
  • 18,828 POSTS
Hi Cleaning pintle is good step cause if carbon keeps it from seating then code is set. Also maybe faulty positioner sensor if PCM receives improper info code is set. see diagram


https://images.2carpros.com/forum/automotive_pictures/198357_Graphic_226.jpg

Hope this helps Thanks for donate
Nov 3, 2009 at 7:37 AM
Avatar
MATHIASO
  • ✓Experienced Mechanic
  • 1,209 POSTS
you have a digital one.
the EGR may cause the random misfire,
check to see if the EGR valve diaphragm moves freely
Use your finger to reach up under the valve and push on the diaphragm. if it does not moves freely, the valve should be replace, if it moves just clean it:
inspect valve pintle for deposit
depress the valve diaphragm and check around the valve seat area.
Use a wire brush to carefully clean deposits from the pintle.
remove any deposits from the valve outlet with a screwdriver
if EGR passage in the intake manifold have an excessive build up of deposit, the passage should be cleaned
You will need a new gasket when reinstalling it .
Nov 3, 2009 at 7:53 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle