Question about 1999 Pontiac Grand Prix

1 Answer

I have a 99 grandam recently catalytic converter went out and mess up my plugs ignition coils and i have a pipe running temporary until i can replace cataltic converter doe that cause it to burn too rich fuel

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 564 Answers

No,,car sounds like it was doing this before,,that y the converter went bad,,ck o2 censer,,or injection regulator

Posted on Feb 04, 2010

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

When i floor my 01 navigator it wont go it makes a popping sound in the throttle body


sounds like the cats are plugged up....remove the o2 sensors and see if it runs better. Mine would idle, but would pop and stumble when the gas was hit. Ran well for a long time but would stumble whwn floored, slowly got so bad couldnt drive it but it idled fine. Pulled the o2 sensors and started it up and all kinds of debris, junk, blew out. Replaced cats and o2 sensors and runs great. cost $2000.00 in parts.If you find that this is your problem, then check to see if the cats came apart and blew chunks into the muffler,,,,can cause a restriction and cook the new cats. Took me a lot of time to get this truck running right, but it sounds like youre dealing with the same issues..I went through the coil packs and chased engine codes for a week. Pull the o2 sensors and see what blows out; and if engine runs better.....hope this helps (spend some time pricing o2 sensors and y pipe with cars...you can save some $. good luck!

Mar 06, 2014 | 2001 Lincoln Navigator

1 Answer

99 Alero 4 cyl. CEL flashing, cuts off while stopped or when slow down to turn corners. Recently started backfiring. Drives fine @40 mph. Went to auto zone and got #3 misfire code.


start with changing your plugs, wires and distributor cap and rotor. If it is the type of system that uses coil overs, then replace coil number three as well. A flashing CEL means that you have a misfire that is bad enough to damage your catalytic converter so get on the one before you have to pay bigger money

Aug 10, 2013 | 1999 Oldsmobile Alero

1 Answer

Catalytic converter has plugged up twice in 3000 miles


Catalytic convertor fails due to oil burning, recent head gasket, improper fuel control,but plugging up at 3000 mile misfire surely plug it up when the vehicle is dumping gas in the catalytic, lean misfire ,running very rich due to a coolant temperature.Who is putting this on?I dont know what state you are from,a catalytic should not be installed unless the vehicle is in proper fuel control.and whoever installed this should foot the bill. You need to claim warranty regardless and plus there is a EO# that must match the vehicle.

Mar 17, 2012 | Cars & Trucks

1 Answer

2005 jeep liberty engine misfire cylinder 5


A code P0305 may mean that one or more of the following has happened:
Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer


If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Nov 20, 2011 | 2005 Jeep Liberty

1 Answer

Diagnostic code error P0306 and P0420 on 2003 Pontiac Grand Am GT


this obd2 trouble code table can help you understand the meaning of code.
and for p040,you can try:

Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
Inspect the downstream heated oxygen sensor (HO2), replace if necessary
Replace the catalytic converter
for p0306, you can try
If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Aug 13, 2011 | 2003 Pontiac Grand Am

1 Answer

Catalytic converter just one is cherry red and my car is running sluggish and loud. I got one opion and he said i need to spend 900.00 on to new cat's with labor. can I just cut those off & run...


Depends where you live.... if your laws say different such as air quality laws etc.... but a surefire TEMPORARY fix to help until you can afford the proper repair is to cut open and remove all the platinum beads in the cats and then weld the cats back up again... no more plugged cats... but again only a temporary fix...

Jul 20, 2011 | 1993 Lexus Ls 400

2 Answers

I own a 1999 Jeep Cherokee Sport 4WD V6. About a month ago, I started getting my check engine light coming on from time to time. One day, when it was on, I stopped and had the code read. It returned code...


Hi kdeyette,
I hope our chat was informative. I am assuming, since you said your Jeep is equipped with a V-6 that it is a 4.7L. You can't swap plug wires because there are none, but you can swap coil packs from one cylinder to another to eliminate the coil pack as the cause of your misfire. As for the "solution" above that says to replace your catalytic converter, all I have to say is if you are not getting the "dreaded" code P0420 "Catalytic Converter Efficiency Below Threshold" - don't worry about the cat. - you MAY get this code once the misfire is fixed, but I wouldn't run out and lay down hundreds of dollars on a converter until the computer tells me it is time....and simply "resetting" codes doesn't fix ANYTHING!!! Just resetting codes and continuing to operate the vehicle with a misfire problem is a sure-fire way to guarantee that the catalyst will need to be replaced. Misfires destroy catalytic converters. Let's hope you get it fixed BEFORE this happens!

Jun 29, 2011 | 2001 Jeep Cherokee

3 Answers

Cde po301


A P0301 code means that the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #1.

Symptoms may include:
· the engine may be harder to start
· the engine may stumble / stumble, and/or hesitate
· other symptoms may also be present

A code P0301 may mean that one or more of the following has happened:

· Faulty spark plug or wire
· Faulty coil (pack)
· Faulty oxygen sensor(s)
· Faulty fuel injector
· Burned exhaust valve
· Faulty catalytic converter(s)
· Running out of fuel
· Poor compression
· Defective computer

If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Feb 15, 2010 | 2004 GMC Envoy

2 Answers

Catalytic converter shot


3 front coils? Ignition coils? If the engine had a miss for a long time the excess fuel can ruin a catalytic converter.

May 12, 2009 | 2005 Ford Escape

1 Answer

My exhaust pipes are glowing hot


The catalytic convertors are no good.They are severely restricting flow.Do not drive until repaired.The car could burn,or damage to the engine could result.

Jul 10, 2008 | 1990 Lexus LS 400

Not finding what you are looking for?
1999 Pontiac Grand Prix Logo

Related Topics:

171 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

76164 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8273 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...