1997 Chevy Monte Carlo 97 Monte Carlo Strange Start-up

Tiny
BBOWEN87
  • MEMBER
  • 1997 CHEVROLET MONTE CARLO
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 104,000 MILES
Hello,

I've had the car for about 3 years now, have not run into this current problem.

The Problem: After I start the car, it stutters, like you can hear the air puttering every 2 seconds or so. During this time, the lights are all dim, and it sounds like it is going to stall, but it doesn't. I let it go, it rev's up to 3,000 RPM, without me touching anything, just starting it up. After sitting there for about 10 seconds, it slowly starts to lower down to 1,000 RPM, then back to the stuttering. It continues in this cycle, over and over.

I have not left it on for more than a minute, and am too afraid to drive it.
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Friday, May 23rd, 2008 AT 12:09 PM

12 Replies

Tiny
MERLIN2021
  • EXPERT
First thing you need to do is have the codes read, Autozone does it free, Post the results with the code number(s). Even if the service engine light is not on, there should be freeze frame data stored.
If it won't make it to Autozone, buy a cheap scanner, they can be had for 30-40 dollars, a good investment, since they cover all cars sold in the USA from 96 on.
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Friday, May 23rd, 2008 AT 12:35 PM
Tiny
BBOWEN87
  • MEMBER
Ok, decided to attempt to drive it, it drove fine to autozone (luckily for me, a block down the road)

There was no Check System message, so the scanner did not show any codes, the clerk told me.

Only thing I noticed when watching him scan it, was that there was no reading from the TPS? Could that be a factor?
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Friday, May 23rd, 2008 AT 12:58 PM
Tiny
MERLIN2021
  • EXPERT
I'm not sure about the scantool they use, I only know they do it free.A bad TPS will cause poor driveabilty, so wont other parts, let me look yous up and see if I can get voltage readings you can refer to.
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Friday, May 23rd, 2008 AT 1:14 PM
Tiny
MERLIN2021
  • EXPERT
Your symtoms seem more like either a vacuum leak. Large one, or the idle air control, or worn throttlebody throttle plate or shaft. Try cleaning the throttle body, then get a can of spray gumout, spray the vac lines and maniflod area, when the idle changes, youve found the leak! You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs!
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Friday, May 23rd, 2008 AT 1:30 PM
Tiny
BBOWEN87
  • MEMBER
Will try this, ty for the speedy responses, will get back to you when I get to the store to buy it.
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Friday, May 23rd, 2008 AT 2:06 PM
Tiny
BBOWEN87
  • MEMBER
After inspecting the engine with the hood up and car running, I found a cracked tube, and the sound of air rushing out of a balloon coming from that area, is there a temporary fix to the tube (certain tape I could use?) To seal it until I have the money to replace it?

It's a tube going to the main block connected to where my water pump is.
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Friday, May 23rd, 2008 AT 2:22 PM
Tiny
MERLIN2021
  • EXPERT
Can you post a digital camera picture? Is it a water or air line?
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Friday, May 23rd, 2008 AT 2:32 PM
Tiny
BBOWEN87
  • MEMBER
I can definitely take a photo, but it would have to be tomorrow, I have to work 4-9, I will def. Keep this updated with a photo tomorrow morning, by the time I get home it will be dark, or id post it tonight.

After taping it, (its an air line), I listened in more closely, and it seems to be coming from more toward the back of my engine, like a spot where they would actually have to pull the engine out, seeing as the engine barely fits in there as it is.

I will take a photo and edit where I am hearing the sound from tomorrow morning.
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Friday, May 23rd, 2008 AT 2:35 PM
Tiny
MERLIN2021
  • EXPERT
See you then!
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Friday, May 23rd, 2008 AT 2:48 PM
Tiny
BBOWEN87
  • MEMBER
Ok!

Problem has been found!

A tube that was SUPPOSED to be connected was not. Brought the Gumout to Autozone and someone their heard the "air" sound from the engine, sprayed some in and low and behold, it showed us where it was!

Now to find a way to put it back on and keep it on, its kinda behind the engine, so kind of difficult to get to, any suggestions?
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Friday, May 23rd, 2008 AT 7:10 PM
Tiny
MERLIN2021
  • EXPERT
Still waiting for the picture, unless you know what it is?
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Saturday, May 24th, 2008 AT 3:42 AM
Tiny
BBOWEN87
  • MEMBER
Yes, I found it, there was a tube behind the engine disconnected letting out air!
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Saturday, May 24th, 2008 AT 9:37 AM

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