Question about Pontiac Bonneville

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I have a 2001 Pontic Bonnevile with a 3.8 V6. Sometimes when started the gages go crazy fuel, oil, battery, the rpms run high and the engine is rough when you drive it hesitates and check gages light comes on. Has new spark plugs and wires fuel and oil sensors. any help appreciated.

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  • 1,449 Answers

Check for a vacuum leak in the small rubber hoses.

Posted on Dec 28, 2013

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Posted on Jan 02, 2017

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SOURCE: Very Rough Idle and sometimes cuts off while idling

sounds like bad Idle Air control valve Not Cheap


Posted on Feb 21, 2009

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SOURCE: 2001 Ford Windstar runs rough.

remove the coil pack and look at bottom of it if it shows any cracks coil is bad very common on these vans if you have a noid light check for injector pulse on #4 if you have pulse and good blue spark most likely the injector is bad you have to remove upper plenum to get injectors out let me know how you make out

Posted on Jun 04, 2009

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SOURCE: 1989 Cavalier Z24 3.1 rough idle and hesitation

I had the same problem with my Z when i had it. But it worked when i just left the little hose off of the EGR valve.

Posted on Jun 13, 2009

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SOURCE: 2001 Pontiac Montana - what is a misfire #5?

Without your actual trouble code, I am assuming that you are have a misfire on cylinder # 5. The computer cannot really tell what is causing the misfire only that cyl 5 is not putting out full power. If it misfires when cold then smooths out as it warms up, I would say it is probably an injector that is sticky, as it warms up it starts working properly.

Posted on Apr 29, 2010

Testimonial: "Thank you for your suggestion. I will have that checked out. I will also ask my mechanic what the actual trouble code says."

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SOURCE: 2001 ford taurus 3.0 v6 code p0306 misfire

Please go to this page for engine misfire causes.

Posted on Aug 08, 2012

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My pontic grand prix super charger

You will have to determine the source of your no start. Highly unlikely a fuse issue. You need to find out if the vehicle has spark to the spark plugs and fuel to the injectors. If either is not there, the vehicle will not start

Jun 13, 2015 | 2008 Pontiac Grand Prix GXP

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I had the exact same problem last year with my 2001 Alero 3.4L V6. It turned out to be that most of the copper strands in the multi-strand ground wire were broken, in the wiring harness passing over the transmission on the way to the fuel pump behind the fuel tank. The same ground wire is shared with several of the warning gages on the dash, causing several to remain lighted all the time. Both of the check engine lights, the brake light, the low oil light, and ABS light would all remain on all the time. Once the frayed portion of the ground wire above the transmission was repaired, the lights stayed out and the car started running normal, with the fuel now actually pumping gas under continuous high pressure to the engine.

Jun 02, 2014 | 2001 Oldsmobile Alero

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Cranking several times before our 2000 pontiac bonnevile starts

The fuel pressure regulator has a check valve in it ti keep up fuel pressure when the engine is not running. There is a test port on the regulator to connect a fuel pressure test gauge.

Dec 29, 2012 | 2000 Pontiac Bonneville

1 Answer

I have 1993 pontiac bonnevile, it will not pass emissions the nox levels are to high this is the fourth try. what can i do. also my check engine light comes on as well.

high NOX indicates your engine is running high combustion temps. Two of the major reasons for lean mixtures are intake leaks and clogged fuel injectors. The reason the engine computer cycles between rich/lean when running is because the cat needs lean mixtures to deal with HC and CO and a rich mixture to deal with NOX. If you are running lean the cat can't lower your NOX. I would first get your fuel injectors flushed and de-carbonize your intake/combustion chambers.

May 31, 2011 | 1997 Pontiac Bonneville

1 Answer

Oil gage buries all the way past high. After driving with it like that for a while, the truck engine konks out and will not start. Last time we waited on the side of road for 40 minutes and then it started...

Do you believe oil gage? Oil psi sensor can go bad. If PSI correct then is PCV valve clear?
I'm more inclined to think you have some kind of electrical problem, false gauge, ignition quits or fuel delivery problem. Extreme high oil PSI would blow out your engine seals, leaking oil everywhere. When you get high oil psi, does removing oil cap make it drop? Do you have good clean oil and filter?
When it quits do you have spark, fuel to delivery system? (throttle body or fuel inj) High oil psi shouldn't make truck hard to start. Baffling.

Mar 09, 2010 | 2005 Chevrolet Silverado

1 Answer

I got a 1990 ford ranger 2.9 v6 its running very crappy

Fluctuating an high RPMs sounds like a leaking or missing vaccume hose to me, I had simmilar problem found open hole with hose off, replaced it now the RPMs are under 1000 again.
As for the stalling I also am having a simmilar problem, and am finding air in the fuel rail, I suspect the fuel pump is going.
I cant go more than a mile without problems.

Dec 03, 2009 | 1990 Ford Ranger SuperCab

1 Answer

1996 3.1L Pontiac Grand AM all gauges went crazy

sometimes when the battery is too low the gages will go haywire.check you battery terminals for good conductivity and current levels. sounds like a low current runs on 12 volts not 11 or 10. low current will give poor performance and bad electrical response.
try that first then look for shorts under the dash ie naked wires or burnt wires.
good luck.

Jun 02, 2009 | 1996 Pontiac Grand Am

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