Running rough

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Oct 4, 2007 | 03:27 PM

Drogo99

Thread Starter

Joined: Oct 2007

Posts: 2

Running rough

1993 Ruby LT1 70K miles. Car is running real rough at highway speed 1500 rpm or so. Almost feels like it is strving for fuel. No codes coming back. I had it in the shop earlier this week and it had a code for EGR coming back and they replaced the valve and at my requirest changed all the plugs. The problem just seems real intermittent when it started doing it this afternoon the SES light did come on but is now offand still no codes....Ideas? Fuel filter? Pump? Clogged injectors?

Thanks!

Oct 4, 2007 | 03:47 PM

rshiver

Senior Member

Joined: Aug 2007

Posts: 383

RE: Running rough

Hi, welcome to CF...Check out this thread, may shed some light on what your problem might be.

https://www.corvetteforums.com/m_43770/tm.htm

Oct 4, 2007 | 04:13 PM

cwb

Senior Member

Joined: May 2007

Posts: 1,567

From: eastern NC

RE: Running rough

Quote:

ORIGINAL: Drogo99

1993 Ruby LT1 70K miles. Car is running real rough at highway speed 1500 rpm or so. Almost feels like it is strving for fuel. No codes coming back. I had it in the shop earlier this week and it had a code for EGR coming back and they replaced the valve and at my requirest changed all the plugs. The problem just seems real intermittent when it started doing it this afternoon the SES light did come on but is now offand still no codes....Ideas? Fuel filter? Pump? Clogged injectors?

Thanks!

Welcome drog...

EGR??? On an LT1??? I thought LT1 didn't even have an EGR...

EDIT: my mistake - only LT4 has no egr feed.

Oct 4, 2007 | 04:17 PM

cwb

Senior Member

Joined: May 2007

Posts: 1,567

From: eastern NC

RE: Running rough

Does 15c revs in the driveway do the same thing?

Oct 4, 2007 | 08:54 PM

mech259

Super Moderator

Joined: Jan 2006

Posts: 1,858

From: Lumberton, Texas

RE: Running rough

Check fuel pressure. Another might be ignition, such as Optispark, wires.

Oct 4, 2007 | 09:08 PM

Drogo99

Thread Starter

Joined: Oct 2007

Posts: 2

RE: Running rough

Thanks for all the tips.....that being said this is my first newer toy car, have lots of older chevy's and checking fuel pressure is not a problem, but how fo I do it on this motor....??? Thanks in advance.