Question about Pontiac Cars & Trucks

1 Answer

What could be causing my 1998 Pontiac firebird v6 3.8l,to "backfire"-"clunk",and lose power when taking off, or getting on the highway???

Posted by on

  • wes gravil
    wes gravil Apr 20, 2015

    Changed spark plugs and wires, maf sensor about 4 mnths ago!

×

1 Answer

  • 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
  • 11,486 Answers

A bad mass air flow sensor , TPS - throttle position sensor , plugged catalytic converter ! You should have it checked out ! Is the check engine light lit ? or any other lights ?

Posted on Apr 20, 2015

6 Suggested Answers

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

  • 58 Answers

SOURCE: my 1974 ford pickup/F250 3/4 ton loses power and backfires

It sounds like the timing is off but moore likely it's caused by the point gap being to close due to wear on the rubbing block.
The gap of the points effects the timing.
You probably need to clean and adjust the points.
If that doesn't work try replacing the points and if the old one are pitted, replace the condenser also.
If that doen't work check the coil.

Posted on Jan 08, 2009

  • 677 Answers

SOURCE: why does my 99 pontiac firebird lose power and

Not a lot of info but it sounds like a fuel blockage.Get fuel filters checked and also the air filter.Hope this may help

Posted on Aug 24, 2009

roniecon
  • 6826 Answers

SOURCE: 1998 Pontiac firebird obd II code 0336

Is the knock sensor pluged up?What engine is this?If the knock sensor is o k ,and not bad,and it is pluged up,then the code is telling you that the timming chain is out of sink.Most likely a half,or less out.A strian on the cam,could cause this,from a oil pump trying to freeze up.Or the timming chain needs to be changed out,along with all it`s components.I hope this was helpful,maybe not good news,but most likely the truth,Let us know if it was helpful if you would,If I can help,let me know.

Posted on Oct 06, 2009

  • 2 Answers

SOURCE: 1987 pickup with Z24 engine started cluncking noise power loss

ck compression sounds like a blown head gasket between 2 of the cylinders

Posted on Nov 03, 2009

drsinister69
  • 2317 Answers

SOURCE: 1998 Pontiac Bonneville SLE will turns over but will not run

I would check to see if the spark plugs are fouled. Or you might have a bad ignition control module (mounted under the coil packs). Auto Zone can test the ignition control module.

Posted on May 19, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Having problems with my 1998 Pontiac firebird. When I sit with the air on my car sometimes start to shake or even smoke. I don't know if it's the exhausts or something dealing with it breathing. Whatever...


A bunch of things can cause this.
It could be the engine idle speed is too low, can be caused by a faulty Idle Air Control valve. Watch the rev counter when it does it and see if it's very low. See if it rises when you turn off the air con. The air con puts a load on the engine which should be adjusted for by the IAC valve (automatically opens the throttle very slightly to keep the engine speed from getting too low).
Also possible to be fuel pressure, Mass Air Flow sensor, ignition coil, spark plugs or even a blocked air filter.
Is the check engine light on?
Try looking at Pontiac firebird forums. Google search firebird idle faults. Good luck.
https://www.google.co.nz/search?q=1998+Pontiac+firebird+idle+adjust&ie=utf-8&oe=utf-8&client=firefox-b&gfe_rd=cr&ei=YbpsWavMPOrc8weH8qDYAw

https://www.google.co.nz/search?q=Pontiac+firebird+ide+problems&ie=utf-8&oe=utf-8&client=firefox-b&gfe_rd=cr&ei=z8dsWcXfBOHDXsLtjoAN

Jul 17, 2017 | Cars & Trucks

1 Answer

1984 f-350 econoline van motorhome backfires after reaching 40mph or going uphill


sounds like the catalydic converter is plugged/partial blocked- replace

May 07, 2012 | Cars & Trucks

1 Answer

I have problems with my 98 chevy k1500 pickup on the highway. Once i hit about 65 mph it wont accelerate and it backfires. also, after i come to a stop and try to accelerate up to highway speeds again,...


If it is running bad enough to be backfiring, the Check Engine light should be on. I would start with scanning the engine computer for fault codes.

Feb 20, 2011 | 1998 Chevrolet K1500

1 Answer

94 firebird high idle when u rev motor it backfires and taps a little bit


If you recently disconnected the battery, your computer will take some time in restarting all of it's original settings.
If this isn't the issue, then you will want to make sure it is not throwing any codes. Take it to any retail automotive parts store and get it checked for free. It's possible that one of your cylinders is misfiring, which would cause it to be high and rough at an idle.

Feb 15, 2011 | 1994 Pontiac Firebird

1 Answer

1987 pickup with Z24 engine started cluncking noise power loss


ck compression sounds like a blown head gasket between 2 of the cylinders

Oct 11, 2009 | 1987 Nissan Pickup

1 Answer

Why does my 99 pontiac firebird lose power and sputter then regain power??


Not a lot of info but it sounds like a fuel blockage.Get fuel filters checked and also the air filter.Hope this may help

Aug 24, 2009 | 1999 Pontiac Firebird

2 Answers

1998 PONTIAC POWER WINDOW PROBLEMS


Double check all your fuses and and wires in connection with your power windows. Unfortunately though pontiacs are notorious for the power window motor regulators to go out, my buddy had 99 firebird and both windows had the same problem, and I previously owned a 98 sunfire and both window motors went out within the same week.

Jan 30, 2009 | 1998 Pontiac Firebird

1 Answer

I have a 1998 Pontiac Firebird, and the drivers side window stopped rolling up and down, I could take the panel off, mess around with the cables, and it would work for a few days. Now when you push the...


its the window switches in the door panel they are attached together replace its only like 15.00 to replace that / please rate my response thank you very much

Jan 30, 2009 | 1998 Pontiac Firebird

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

47 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8202 Answers

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

Answer questions

Manuals & User Guides

Loading...