Question about 1999 Pontiac Grand Prix

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99 grand prix se wont pass smog after sitting for a year and putting new battery in

Sat for two years and just changed dead battery,runs great,starts great,all fluids clean,hoses great,belts great,engine clean,recently tuned up,just lacks driveing time cause its not registered

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  • Pontiac Master
  • 454 Answers

Clean out your egr valve.

Posted on Apr 16, 2015

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1 Answer

My 99 durango will start up but u have to give it gas to stay running same when pulling down in gear


Change the gas filter. If car sat for 2 years without being started, the gas could be stale Put fuel system cleaner in gas tank. The car may need a double dose.

Mar 23, 2014 | 1999 Dodge Durango

1 Answer

I have a 96 Sentra which has been sitting for two years. it has 240,000 miles on it. It runs smooth but will not pass California Smog. What parts can I check or replace to improve the chances of passing...


CHANGE AIR FILTER.CLEAN FUEL INJECTORS.CHANGE SPARK PLUGS AND WIRES.BECAUSE MISFIRE CAUSE RICH CARBON MONOXIDE OUT PUT.MAKE SURE CHECK ENGINE LIGHT NOT ON IF SO CAR WONT PASS INSPECTION.CODE SCAN CAR SEE WHAT TROUBLE YOU ARE GETTING.

Feb 27, 2011 | 1996 Nissan Sentra

1 Answer

Been sitting for a few weeks. Battery appears


change thye battery as i dont think your jump leads are man enough

Jul 16, 2010 | 2000 Pontiac Grand Prix

1 Answer

My grand prix been sitting alone for five years in the driveway, I've decided to try to get it running, I changed the oil and flushed the radiator out, it will crank but it wont start...any Ideas??


What about the fuel system, to start with, the tank may be full of gunk, rust etc, and now traveling down the fuel lines. Unless that vehicle has had fresh fuel and run once in a while, that will need a thorough cleaning/flushing before I'd even try to start it up.

Jun 22, 2010 | 1996 Pontiac Grand Prix

1 Answer

How can I fix the engine from running rich? It runs so rich. It doesn't pass CA Smog? How can I isolate the problem? Also the car has been sitting in driveway for a couple years. But I started it for first...


this is what i did when my 89 chevy beretta failed and the guy handed me a pamphlet on turning in your junker car for a $1000...and he was kind of laughing like you failed and i got you money anyway because he thinks he knows that there's no way my car will pass again.
here's what i did.
#1 changed out all plugs and wires
#2 changed my oxygen sensor
#3 inspected all my vacuum hoses found a crack going to the MAP sensor
i just cut off that end and shoved it back on. and changed out the PCV valve and also found a crack in that hose but couldnt replace it, so i just rapped it real tight with black electrical tape.
#4 cleaned up throttle body real good and the IAC sensor with throttle body cleaner
#5 replaced the oil and filter
#6 serviced the transmission fluid
#7 replaced my catalytic convertor
#8 ran my car around and got it real hot before taking it in
retested and you should have seen the look on his face and i said thanks to him my car was only getting 19 to 20 miles to the gallon my dash computer says im getting 28 now. it was really low smog readings and he couldnt believe it.
so if you do all these things it cost $150 for a cheap cat
i think $40 for oxygen sensor
$30 for oil and filter
$60 for trans service
$40 plugs and wires
$7 throttle body cleaner
$8 PCV
total $335 it should pass
on my other car it failed smog so i went this time and just changed the cat and it passed..not quite as good as my beretta but a pass is a pass. try this and you'll probably at least pass! who knows you might even increse your mpg. Can you rate this, thanks!

May 09, 2010 | 1990 Pontiac Grand Prix

1 Answer

What years 3.1 engine will fit in 1998 pontiac grand prix


Unfortunately it's a (relatively) one year only engine (without major component changes). However, these will fit without those changes:

'97, '98, '99 Buick Century,

'98, '99 Lumina (car),

'98, '99 Grand Prix,

'99, Monte Carlo.

This is assuming that you have an (8th digit) "M" VIN. Off the top of my head.


Mar 07, 2010 | 1998 Pontiac Grand Prix

1 Answer

04 pontiac grand prix wont start.


first remove the battery and take it to a auto parts place and have them check it. move on from there. if the battery is good the do a starter draw test. take a meter and hook it to your battery. now have someone try and start the car. if the voltage on the battery drops from 12.8 to below 9 volts then the starter is bad. if the voltage doesnt drop much at all then its prolly the solenoid both of which require starter replacement since most solenoids are on starters. if still nothing then check ignition switch. but before anything else ensure vehicle is in park. if it is in part use a meter to test neutral safety switch.

Mar 20, 2009 | 2004 Pontiac Grand Prix

1 Answer

1999 grand prix problem.... NEEd help please!!!


you probably need a brake job everything must be rusty if you left it indoor it might be better change the engine oil check all liquid that about it when you start it check if alternator turn good not seize hope it a fix for you and a fixya rating for me thanks pierre

Aug 14, 2008 | 1999 Pontiac Grand Prix

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