Question about 1995 Pontiac Grand Am

1 Answer

1995 Grand Am idles rough

Bought a 1995 Grand Am and replaced the cylinder head, spark plugs, coil pack, etc. Spark is good and plugs are top of the line. Machined and put together the cylinder head myself (that's what I do for a living). Car starts fine but idles rough. There is NO miss. Will drive normal but shakes and runs rough when idling, but runs like a champ when you drive. Please help me.

Posted by on

  • jh_kluedtke Jan 24, 2009

    I personally changed the injector o ring seals, so I know it's not that. I sprayed the entire intake and throttle bottle and cannot find a leak, but I changed the vaccuum lines anyway. I know I have a vaccuum leak somewhere but I can't seem to find it. It vaccuum tests at 11" - 12" at idle. You snap the throttle and it goes to 0, then up to 20, then back down to 11" - 12" and it does it very quickly, not slow or anything.

    Checked the compression and it's good.

    Thanks for the comment though.

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 27 Answers

Sound very much like you have an air leak problem and even a seal problem to on the intake manifold and injector seals may be leaking same happend to me on my car and i found i had to strip it all again to sort it out .
the injector seals if they are not sitting right or just a slight spec of dirt there you have a problem.
air leaks to see if you do have one use wd40 can spray on the manifold and if the engine picks up you have a leak ok
i hope this helps
let me know how you go on thanks
acemasters

Posted on Jan 18, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

Check engine light on engine acts as if missing new plugs wires and #5 spark pack missing again 6cyl 4x4 3.4 185000 miles


was it running this way before you changed the plugs? just a shot in the dark here possibly a defective spark plug, rare but not impossible. if it was running fine before changing them. Other wise I would take it to autozone and pull codes if it is P0350 #5 misfire we would use the process fuel, fire and compression. is there any engine coolant around any cylinders? Have you checked the coil packs? could be a bad coil pack. if no evidence of fluid around them proceeded to check for spark, fuel then compression. post back results or new post with more deductions. iis it no spark no fuel or bad compression.

Dec 25, 2014 | 1996 Toyota T100

1 Answer

2002 pontiac grand am se1 6cyl is idles rough


what mileage,spark plugs,fuel filter[,coils module,this #1]

Feb 22, 2013 | 2002 Pontiac Grand Am SE

3 Answers

Where can I find the spark plugs


There are individual coil packs for each cylinder. They are held in place by a single 10mm nut. Remove the nut and lift the coil pack up. You may have to wiggle it around a bit and pull hard. The spark plug is located in the hole you just removed the coil pack from. The spark plug boot is attached to the coil pack.

Jan 30, 2011 | 2002 Jeep Grand Cherokee

1 Answer

Rough idle rough acceleration


I just had this problem, check the secondary resistance across the spark plus terminals on each coil. We had 0 resistance on the top coil in the pack, replaced with a good one and all was fine.

Sep 23, 2010 | 1995 Buick Riviera

1 Answer

Runs rough when idling, even worse in drive, and nearly cuts off in reverse. Loses power climbing a hill.Is not running hot. Oil and trans fluid look good. Sometimes "service engine light is on". Changed...


I would perform a compression test on all cylinders if you've already changed your plugs and wires. This willtell u if u have ay mechanical problems with the engine. Also even tho you've changed your spark plugs and wires did you check your injectors or coil packs to ensure they're good. A problem with either will also cause misfires.

Sep 02, 2010 | 1995 Pontiac Grand Am

1 Answer

Where do the spark plug and wires go on my 1999 nissan maxima


The Spark Plugs are located under the Coil Pack in the Cylinder Head. You need to remove the silver cover on the front part of the engine which are held down by Allen Bolts to access the Coil Pack. You will need to remove the two bolts holding the Coil Pack to the Cylinder Head. Pull up on the Coil to remove the Coil and inside the hole will be the Spark Plug. The rear part of the engine next to the firewall has no cover so you will need to just remove the Coil Pack. The Nissan Maxima is very picky about the brand of Spark Plugs you replace them with, You should only use NGK Platinum Plugs or Better in your Maxima, Any other brand will make your car run rough.

Aug 05, 2010 | 1999 Nissan Maxima

2 Answers

How to replace spark plugs on 2000 jeep cherokee classic 6 cyl.? Also does 2000 cherokee have inline fuel filter?


TO REPLACE SPARK PLUGS YOU REMOVE COIL PACK MOUNTING BOLTS THEN REMOVE THE COIL PACK WITH BOOT OVER THE SPARK PLUG.YOU HAVE 6 INDIVIDUAL COIL PACK TO EACH CYLINDER. YOU NEED A 3/8 RATCHET WRENCH - LONG 3/8 EXTENSION -SPARK PLUG SOCKET - SPARK PLUG GAUGE.AND TORQUE WRENCH.THE 2000 MODEL JEEPS FUEL FILTER INSIDE THE TANK.1993 - 1996 MODEL JEEPS FUEL FILTER LOCATED LEFT SIDE OF THE VECHICLE NEAR THE FUEL TANK.

Jul 20, 2010 | 2000 Jeep Grand Cherokee

1 Answer

I have a 2002 TrailBlazer with the straight 6,diognostic check said #3 cylinder was dead or misfiring, also map sensor showed up. #3 cylinder was misfiring, so to test the coil pack I swapped #3 coil pack...


did you replace only one spark plug? that can cause issues because of differences in resistances between cylinders. also, did the map code stay off after replacing
?

Feb 28, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

Engine missing, particularly in idle, or dies when turning


The intake gaskets leaking would cause the engine to have a misfire. Get a can of Brake Clean and spray in around the intake manifold on the top of the engine while the engine is running. The engine idle will go up or down if there is a leak. Also try swapping the spark plug with another spark plug to see if the misfire moves to another cylinder. If it moves then you have a bad spark plug. I hope this helps.

Jan 02, 2009 | 1995 Pontiac Bonneville

Not finding what you are looking for?
1995 Pontiac Grand Am Logo

Related Topics:

175 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

61249 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

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

Answer questions

Manuals & User Guides

Loading...