Question about 2000 Pontiac Bonneville

8 Answers

1997 bonneville se won't start/idle

So my truck had seen its last day, and now i'm stuck downtown with no transportation. I get $150 for my junker, and buy this 97 bonneville. It had been sitting for 5 years, trying to get back i put some fresh oil in and gave it a jump, i used the old gas. From the get go the car would start but only remain on if I were to pump the gas pedal. Since I got it back to my house, I have replaced the plugs and wires, MAF, multiple vacuum leaks, fuel filter, fuel lines, fuel injectors, fuel rail, coolant temp sensor, and battery, I have checked a handful of grounds as well, and on top of that I dropped the gas tank and hooked up my fuel pump to a 12v battery (seems to be working fine), also performed a motor flush, and to the best of my knowledge have cleaned out the gas tank. Now I am an aspiring mechanic and realize I have thrown a lot of unnecessary time and money into this car to pinpoint the source of the problem, but given all this, I am still stuck with the same issue

Issues:
my car won't idle
can only gain RPM's by pumping the gas pedal
while car is running I hear a loud "suction" noise coming from air intake
there is an occasional backfire

Posted by on

  • 1 more comment 
  • Matthew Brandenburg Jan 28, 2009

    i'm not sure i quite understand...if it's any consolation I am not taking my car to an auto shop lol, I have all my own professional tools and lack in the all around knowledge, if I know where to look, I will be able to fix the problem

  • Matthew Brandenburg Jan 28, 2009

    please allow me to reiterate my goals with this post, I would greatly appreciate any opinions on what my problem could be, my car is sitting out front waiting to be tinkered with....by me :)

  • Matthew Brandenburg Jan 31, 2009

    There is no sign of blow by. Now as for testing my distributor points, how do I go about doing that? And say replacing my distributor doesn't fix this problem, a list of possibilities/places to look for problems would be GREATLY appreciated

×

8 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Pontiac Master
  • 19,396 Answers

Check the air intake and air filter, do a scan of car ECU to see if you get any error code out (IAC, MAF etc.)

Posted on Jan 31, 2009

  • 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
  • 491 Answers

And if your still hearing suction then it could be a bad intake gasket and needs to be replaced

Posted on Jan 31, 2009

  • 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.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 2,559 Answers

Here you go.

  1. The back fire is caused by either the timing being off, a sticking valve,or the IAC.
  2. Check the fuel tank pressure sensor.
  3. Check the TPS (Throttle position sensor).
  4. Check and clean the IAC (Idle Air Control Motor)
Let me know if you need

Posted on Jan 28, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Governor:

    An expert whose answer got voted for 20 times.

  • Expert
  • 104 Answers

Still hearing a vaccuum leak it sounds like. You bought a mass air flow, I assume new, so make sure all your intake air is flowing through it. Unmetered air makes it hard to start right off the bat, so try to pinpoint that suction sound. If you don't have access to a scanner to read the values of sensors like the throttle position sensor, you can't be sure they are operating at all. May want to seek some professional help for the initial diag. like a shop with a scanner that will read the pcm's datastream. You didn't say you moved or removed the distributor, so I assume that is ok.

Also, since you had the tank out and were testing the pump, did you check inline pressure? If not, I would rent one from a local parts house or buy a cheap kit that can read the fuel pressure (inline) on a hose closer to the engine since tank is back in car. The pump should produce around 40psi, maybe higher. If it's not even close, the fuel pressure is too low, and the pump should be renewed. You never said if you checked for spark now that all this other work is done. I would do that before the fuel test. Spark testers are cheap, and can also check a wire for spark by putting a real plug in it, and running a jumper wire from the plug body to a good ground. Lay the plug on a rag somewhere safe on top of the engine, and have someone crank the motor. Look for a consistent, rythmic spark with lots of bright strength, not a weak little blue spark, a bright white or gold spark. Then move on to the fuel pressure test, and finally spark timing at the distributor if present. If timing, spark, and fuel pressure are correct. You must have a big vac leak, or a sensor not working right. Let me know how I can help you get further on your new project. I hope this helped give you a plan of attack. You are sort of muddying the waters with all the parts that have been put on the car. But if you've bought everything else, maybe another 30 bucks for a TPS is in order. First start with the basics, though.
Spark, fuel pressure, and timing. Good luck, I'm interested to see how it goes! TT

Posted on Jan 28, 2009

  • Patrick Dennehy Feb 11, 2009

    Points and blowby? It's a '97 guys. What year do you stop looking for points? '79, or '80? Hopefully by '97! Blowby is the least of your worries, I'm certain; as are your non-existent points.

×

  • 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.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,952 Answers

If a major tune-up has not been done recently, this could be the cause of your problem. Replace the spark plugs, plug wires, fuel and air filters, etc. Also, replace the oxygen sensor. In addition, service the fuel injection system. Clean the carbon deposits from the throttle bore and idle passages. Check the catalytic converter to make sure it is not plugged or restricted.

Your car is equipped with a computer controlled engine management system. An independent auto service center can scan your computer for fault or error codes. The information should pinpoint the malfunctioning components. If after scanning the computer there are no fault codes, then the ignition module may be faulty.

The noise may be the transmission. Try having the transmission services (new fluid and filter) and drive it for several days to see if it clears up.

Posted on Jan 28, 2009

  • mohammed marika thambi
    mohammed marika thambi Jan 28, 2009
  • mohammed marika thambi
    mohammed marika thambi Jan 31, 2009






    :
    Your problem may be an IAC (idle air control) valve.
    Also, check for
    a faulty EGR (exhaust gas recycling)
    valve that may be sticking open.
    :
    Your problem may be an IAC (idle air control) valve.
    Also, check for a faulty EGR (exhaust gas recycling)
    valve that may be sticking open.

    The symptoms you describe are classic idle air control
    motor
    failure. As far as we know, your car
    should be equipped with an idle air control motor.
    Perhaps you asked for an idle air control sensor
    rather than an idle air control motor.



×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 6,784 Answers

Hi there, Two issues here. you may need to run a test on your distributor. your points may be bad or, you could replace the whole thing. secondly, check for blow by. this will be smoke blowing past you rings in the piston chamber. when the car is running, it will have smoke coming out the tale pipe if so. this engine may need to be totally overhauled. im sensing a timing problem as well.

Posted on Jan 28, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

    Champion:

    An expert who has answered 200 questions.

  • Expert
  • 435 Answers

Hi, To get the complete list of problems that you might need to fix, take it to a good mechanic like firestone.
Get a CSI (Complete System Inspection) done. It would cost only 20 bucks to get the complete list of problems w/ the engine and stuff.

Posted on Jan 28, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Expert
  • 153 Answers

U could rather go to a nice garage and give a nice service tat can work out

Posted on Jan 28, 2009

  • nicra7 Jan 28, 2009

    why dont u change the oil pump


×

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

High idle


Clean throttle body very good.Check air flter,

Apr 28, 2013 | 1997 Pontiac Bonneville

1 Answer

97 ford f-150 4.2L won`t start after setting for 3 day`s, no codes shown.


Leaving it sit does nothing good. Are there any lights coming on in the dashboard?

Feb 17, 2013 | 1997 Ford F150 Regular Cab

1 Answer

My 97 Bonneveille SE shuts off while driving out of no where with no type of warning signs... Once the car shuts off I can always start it right back up and drive... What could this be?... Sometimes after...


I have a 97 bonneville that had the same symptoms.....After suspecting many things relating to the fuel system and many leaky vacuum hoses the part that solved my problem for good was the FUEL PRESSURE REGULATOR. It is about a $40. part and is fairly easy to replace....maybe this might work for your problem as well. good luck

Sep 22, 2011 | 1997 Pontiac Bonneville

1 Answer

Sometimes when I start my 1992 Bonneville SE, the idle starts out high and never slows down. I have to ride the brakes to not just accelerate to max speed. I have tried fuel system cleaner and it...


1992 the stepper motor, the idle air control is a stepper motor its movement is by a jackscrew, this jack screw tends to bind out of so many years of moving you can try to clean it out with carb cleaner that might work other that its stuck in high position, or since its broken you know linkage pull wide open throttle do you see the idle extension screw it in make it low. youll be okay for now.or just replace it

May 06, 2011 | 1992 Pontiac Bonneville

1 Answer

1998 Pontiac Bonneville SE 3.8L Backfires/ Sputters


sounds like the ignition module is going bad.

Aug 04, 2009 | 1998 Pontiac Bonneville

2 Answers

Need diagram how to install serpetine belt for my 1997 pontiac


CLICK HERE - as you did not indicate the accessories installed.

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

May 27, 2009 | 1997 Pontiac Bonneville

Not finding what you are looking for?
2000 Pontiac Bonneville Logo

Related Topics:

59 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

70374 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22041 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6878 Answers

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

Answer questions

Manuals & User Guides

Loading...