Question about Cars & Trucks

1 Answer

Pontiac 3400 bad misfire changed plugs wires and one coil pack didn't help

Posted by on

1 Answer

  • 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.

  • Cars & Trucks Master
  • 957 Answers

Not a lot of information to go on. it could be with all u have done not helping that the engine could be out of time. when it miss fires does it pop or backfire? if it does your problem most likely is with the timing.. also r u sure that the other coil packs r good? it might be worth it to have them checked first. hope this helps

Posted on Apr 16, 2014

  • Jamie Robinson Apr 16, 2014

    Yes I have the other two packs too put on its more of like a backfire in the manifold

×

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

emissionwiz
  • 75797 Answers

SOURCE: Misfire

Check to make sure the fuel injector is working on that cylinder, check the connector to the injector for a loose or damaged pin, get a NOID tester from a parts store and see if the injector flashes the NOID light while the engine is running or cranking.

Posted on Oct 13, 2008

  • 36 Answers

SOURCE: Random Misfire on 2 & 3

I had a problem with a chevy with random misffires on all cylinders. It was the computer. Fords have very few problems with there computers. Does the check engine come on? Maybe have it scanned. 

Posted on Dec 12, 2008

66 chrgr
  • 1011 Answers

SOURCE: code p303

very common problem two things either the injector on that cylinder is bad or the fuel rail need clean out with injection clean a good shop can clean them.

Posted on Jan 25, 2009

  • 1 Answer

SOURCE: 2001 Firebird 3.8 misfires

Check your alternator see if you have a drop in voltage on your tack,then it is the problem.I too was a victim of high price tune up and still had a problem with a misfire.and cover your coil pack with a piece of rubber water run of onto your power pack .Another thing is to use a silicone spray on all wires.

Posted on Jun 11, 2009

csmock132
  • 4669 Answers

SOURCE: 1999 Grand Am 3400 v6 misfire.

I was asking about the pushrods because I had this problem with one of these engines that had a bent push-rod. I robbed a push-rod out of an older 3100 and it was just a fraction of an inch longer which bottomed out the lifter. I figured it out by removing the valve cover and loosing the rockers when it was running and it smoothed out. I'm guessing you checked for vacuum leaks already. How about injection pulse on the number 6 cylinder when running. Another thing you could check is running compression. You said you checked compression but did you just check cranking compression or did you check running compression too.

Posted on Apr 09, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Tune 3400 sfi acts like it jump time.


I would consider changing the crank sensor.

May 02, 2014 | 1997 Pontiac Trans Sport

1 Answer

Pontiac 3400 misfire problem one new coil pack new plugs and wires on still running bad have too press gas too start now bad fuel mileage unburnt fuel smoke when engine starts for a few seconds then stops...


some of the cylinder wont get spark, faulty spark plug, wire or coil. To check pull all spark plugs out, plug them to the wires and put on the engine top and then cranck the engine to see which spark plug not giving a spark

Apr 16, 2014 | Cars & Trucks

1 Answer

1998 pontiac firebird coil pack, will coil make it miss on 1 cylinder, 3800 engine, misfiring, have changed plugs and wires


yes, it can happen. check for spark from the number one coil using spark plug wire and hold it near a grounded point. it should be a consistent spark with engine running. compare to different coil wire for verification. those coil packs are partially replace able because each coil fires two plugs. replace the no.1 portion with a new one from parts store. 28.00

Jun 21, 2011 | 1998 Pontiac Firebird

1 Answer

OBDII code P0306 describes misfire # 6 cyl or ign misfire, wires are new, coils (3) are new, rough idle on acceleration possible bad fuel injector or ???


I noticed that you didn' t mention the plugs. I'll assume that if you did wires and coils that plugs are also new, so I would say that you need to check the injector on that cylinder

Jan 07, 2011 | 1996 Pontiac Bonneville SE CA Value

1 Answer

Code P0300 on a 2002 Pontiac GP with misfires on # 1&3. replaced plugs & wires checked coil packs. this occurred after the car stopped along side road with bad water pump.


try switching one of the other coil packs with one of the bad ones. if this works then there you go. another way of telling if it is a coil pack is to disconnect the spark plug of the affected coil pack. if its a strong coil then you will hear the spark as well as see it. compare it to another plug boot that has the good spark. it sounds to me that it is a coil pack. i just changed one about 2 months ago with the same problem as yours.

Apr 17, 2010 | 2002 Pontiac Grand Prix

1 Answer

Misfiring while driving


Check the spark plugs, make sure they all seated and are tight. Also change wires. Probably the coil packs, but check the cheaper stuff first.

Nov 17, 2009 | 2001 Pontiac Grand Am SE

2 Answers

2001 pontiac cowl pack not fireing.


Here is a diagram of the firing order for you 3800 engine. Cylinders 1 and 4 are misfiring because the operate under the same "Coil Pack" and the coil pack has unfortunately gone bad. O'Reilly sells them for between $30-50 depending on the amount of warranty coverage you want. To replace, simply unscrew the screws that hold the coil pack in place. WAIT before unplugging the plug wires. Place the old coil pack and new coil pack next to each other, unplug one plug wire, then plug it to that same port on the new coil pack. then do the same for the other plug wire. Then screw your new coil pack in place, and start you car. should run fine!

3098a58.jpg

Sep 24, 2009 | 2001 Pontiac Bonneville

9 Answers

Misfire #3 cylinder


Has anyone found the problem? My 2003 has #3 cyclinder misfire and I have replaced the plugs and wires. It runs rough at idle but smooths out at highway speed. Anyone have any knowledge on this? This sounds like a common problem.

Sep 09, 2009 | Cars & Trucks

1 Answer

2001 Firebird 3.8 misfires


Check your alternator see if you have a drop in voltage on your tack,then it is the problem.I too was a victim of high price tune up and still had a problem with a misfire.and cover your coil pack with a piece of rubber water run of onto your power pack .Another thing is to use a silicone spray on all wires.

Jul 17, 2008 | 2001 Pontiac Firebird

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

Related Topics:

26 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

75797 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

Randy Ohler

Level 3 Expert

14585 Answers

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

Answer questions

Manuals & User Guides

Loading...