Momentary Engine Stall

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Mar 16, 2007 | 11:57 AM

eelstx

Thread Starter

Intermediate

Joined: Jul 2006

Posts: 27

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Momentary Engine Stall

Trying to describe a knock, rattle, or any problem with a mechanical device is difficult at best, however, I'm going to give it a shot:
1. 2001 C-5 Automatic
2. 119,000 miles
3. Meticulously maintained; uses about a half quart oil between 3000 mile oil changes.
4. Original alternator
5. Battery 1 year old
6. Use only Shell 93 octane
7. No codes displayed and no history codes
8. Recently had new plugs and wires installed and MAF cleaned.
9. Stock air filter (just replaced)
10. B & B Rt 66 exhaust, no other mods.
11. Car is daily driver freeway and some stop and go 60 mile round trip each day.
Here's the problem: Once I start the car and drive 5 - 10 minutes sometimes more and somtimes less; once I come to a standstill as at a stop light or line of traffic, and the car idles for a few seconds, the engine abruptly and momentarily stalls, but them keeps running - - - just as if someone flipped a micro second switch or as on older cars, someone briefly jerking and reinserting the coil wire. Then car idles OK. This may happen once or more at idle and only at idle speed.
Any suggestions as to what my problem may be ? Will certainly appreciate your input !!!
Thanks in advance
eelstx

Mar 16, 2007 | 12:06 PM

Bill Curlee

Tech Contributor

Joined: Dec 1999

Posts: 32,910

Likes: 2,402

From: Anthony TX

CI 6,7,8,9,11 Vet

St. Jude Donor '08

Ther very first thing that you need to do is read and post any DTC's that the computer may have

its easy::

This is the absolute best C5 Diagnostic Trouble Code (DTC) web site!!!

http://www.corvettedoctor.com/Code_Main.html
http://www.corvettedoctor.com/index.html

www.corvettedoctor.com

Go to “technical data base” and then to “Corvette ECM Computer Codes”. Then select your year car. Read the instructions and then scroll down to the "READ MORE" window to view the code definitions.\

Here is another very good site:

http://www.obd-codes.com/trouble_cod...d-ii-codes.php

Make sure to include the H or C suffix!!

If you have a ton of codes press the reset button and CLEAR them! drive it until it does it again and read the codes.

i have a couple of ideas but want to see the codes first.

BC

Mar 16, 2007 | 12:44 PM

eelstx

Thread Starter

Intermediate

Joined: Jul 2006

Posts: 27

Likes: 0

Bill - - - No codes displayed either current or history
eelstx

Mar 16, 2007 | 12:47 PM

Bill Curlee

Tech Contributor

Joined: Dec 1999

Posts: 32,910

Likes: 2,402

From: Anthony TX

CI 6,7,8,9,11 Vet

St. Jude Donor '08

Call me! check your PM.

Mar 22, 2007 | 11:55 AM

TAGVETTE

Racer

Joined: Nov 2004

Posts: 326

Likes: 0

From: VA

I've had the same problem. If I'm above 2200RPM, the idle drops to about 500, sometimes as low as 2-300 then shoots back up to 1000. It'll hunt around until it finds the regular idle. The higher the RPM, the worse it is.

I have a blackwing with the hole cut in the shroud.

Mar 22, 2007 | 12:53 PM

Mr. Jones

Drifting

Joined: Oct 2002

Posts: 1,335

Likes: 76

From: Bedford Va.

I don't have anything solid but look at the electrical wiring around the injectors and coils for a cut.
a coil may also be on its way out.

Mar 31, 2007 | 10:42 AM

DRIVER456

Melting Slicks

Joined: Jun 2005

Posts: 3,088

Likes: 61

From: NY- 2013 Corvette Challenge Champion-2013 Index Combo Champion 2015 CC/MM Champion

St. Jude Donor '07

I have the same thing!.Going from park to drive or drive to park and when I come to a stop or just rev the engine it die's out for a split second but then idles fine.I tried tuning it out,But can't seem to do it.Can't figure it out

.......................Paul

Mar 31, 2007 | 05:34 PM

dgrant3830

Tech Contributor

Joined: Dec 2006

Posts: 10,962

Likes: 29

From: Van Buren Arkansas

Wounded Warrior Escort '11

Have you checked out the PCV Valve yet? The connector tube from it to the intake can develop holes in it, particulary on the bottom side out of sight.