pontiac grand am low idle - Car Troubleshooting


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

Drive Shaft Repair

I have a 2015 Chevy Traverse AWD. The fr...

2006 Toyoto Camry XLE Driver Side Electric Window Trouble

Hello, Looking for a little brain help ...

Tierod end change caused some kind of leak

Hello so I just took my car to the nearb...

2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes

When I bought this car in summer 2023, a...

Grounding Cable, 2017 Jeep Renegade Trailhawk

The Cable that connects my negative batt...

Rough Idle (Found new thing)

Hi everyone. First of all sorry for bad ...

equipment

hey yall. im a first year engineering st...

HELP

I have a 1956 1/2 ton panel truck, 69 35...

Howdy

    Just wanted to s...

ABS/Tractiob/Brake Lights on But No DTCs

Hello all, Recently while driving m...

pontiac grand am low idle

Sign up here!

Email This Post

Auto Repair Home>> Automotive Repair>> Car Troubleshooting

mozlike
New User

Mar 29, 2010, 1:37 PM

Post #1 of 4 (10960 views)

pontiac grand am low idle	Sign In

I have a pontiac grand am 2001 4 cylinder with 150000 miles on it. After car warms up when sitting at a stop light in drive the rpms will drop sometimes killing the car. It only seems to do this after the car has warmed up. I do alot of freeway driving so it isnt a huge problem but any in town driving can become tedious, i.e, always having to turn over car at stop lights. The average idle speed is between 500-600 rpms which i believe is a little low. I have put in new plugs, oil changes, battery, and fuel injector cleaner all to no avail. What could be going on here? Also I have hooked it up to a code machine and it isn't throwing any codes. Any advice would be greatly appreciated. thanks!

Sidom
Veteran / Moderator
Sidom profile image

Mar 29, 2010, 7:51 PM

Post #2 of 4 (10945 views)

Re: pontiac grand am low idle	Sign In

There could be a few things going on with. The 1st thing you can do would be to clean out the throttle body with some throttle body cleaner and a little brush. When they get too dirty the IAC can't compensate any more and you will get this type of problem..... Try that and let us know how it works out for you.

mozlike
New User

Mar 31, 2010, 8:13 AM

Post #3 of 4 (10939 views)

Re: pontiac grand am low idle	Sign In

Well... cleaned out throttle body and map sensor also replaced hose off map sensor and it is running....better. quicker start and better idle but, it is still dropping rpm after warmed up. It isn't killing the car which is an improvement but it is still doing it all the same... I'm on to something i think but now what? Any help is always greatly appreciated.
thanks again,
kat

Sidom
Veteran / Moderator
Sidom profile image

Mar 31, 2010, 8:15 PM

Post #4 of 4 (10931 views)

Re: pontiac grand am low idle	Sign In

It's possible you could have a bad IAC motor. When you start the car the idle should raise to over 1000 rpm and then drop back to the normal range some where around 600. If it's cold it'll stay high longer....

You also have to make sure you don't have any vacuum leaks this can also give you a low idle problem and wanting to die while in gear.... Get a can of carb clean and spray around the intake manifold, throttle body gasket & hoses any raise in idle would indicate a vacuum leak.

Email This Post

Search for (options) Privacy Sitemap