1991 Pontiac Grand Am Logo

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Posted on Feb 20, 2009

Need plug wire order to coil packs.

1991 grand am with 2.5L. I believe its a C3I ignition system: two coil packs over mounted over ignition module with a sensor that goes into block to the crankshaft. My Haynes manuel has two different diagrams in two seperate sections: first shows spark plug wires are attached to the coils from top to bottom 2-3-4-1; the other shows 3-2-4-1. Which is correct if either is correct?

  • Marvin
    Marvin May 11, 2010

    1 3 4 2

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5 Related Answers

Nickie Sudekum

  • 2 Answers
  • Posted on Jan 13, 2009

SOURCE: 93 pontiac grand am

This happened to me on my 93 grand am. I also like you got new sensors and a new computer which did not fix the problem. It turned out to be a cracked wire at the battery. Thats right a wire on the positive side of the battery that wasn't even broke all the way through. I re spliced the wire and VAROOOOM it fired right up.

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Anonymous

  • 15935 Answers
  • Posted on Jan 22, 2009

SOURCE: car wont start

I noticed you replace the crankshaft sensor, but not the CAMshaft sensor.
The Ignition module takes the input of both sensors to tell the coil when to energize.
This sensor should come up as an error code when you attach a obd reader.
Even if your light is not on - there may be a code. If it is not your vehicle originally, some people pull the bulb!

daves944

Dave C

  • 1050 Answers
  • Posted on Mar 14, 2009

SOURCE: 2003 grand am 3.4 code p0304

More likely a plugged injector as that code is specific to cylinder # 3 These engines are also very prone to failed intake manifold gaskets and stuck valve lifters. I think I'd start with a compression test, if that's good, go injector. If the compression is bad, you've got a can of worms. Hold off on the O2, I don't think it's related.

Anonymous

  • 158 Answers
  • Posted on Aug 30, 2009

SOURCE: spark plug wiring diagram for gm 3.4 liter v6

http://autorepair.about.com/od/enginefiringorders1/Engine_Firing_Orders.htm

jason jagodzinski

  • 110 Answers
  • Posted on Feb 25, 2010

SOURCE: i have a 99 grand am SE 2.4 4 cylinder and my

A misfire doesn't always have to be ignition... it's just the most common cause. Faulty or plugged injector, low compression. You need to check fuel pressure and test the fuel injector flow. Then check compression. If you don't have tools for these tests, take it to someone who does. Testing is much cheaper than throwing parts at the problem.

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Hey there,i have a 1991 msuatng LX with the 2.3L ho engine running an 8 plug head. it sounds like i may have a misfire of some sort or my timing may be out but im not sure how to tell, could someone give...

Insert each wire on the proper terminal of the ignition coil. Ensure that the coil boots are fully seated and both locking tabs are engaged. The terminals are identified on the ignition coils. Install wires as shown in the illustration. The 2.3L firing order is 1-3-4-2 for both ignition coil assemblies.

Distributorless Ignition System In the distributorless ignition system (DIS), all engine timing and spark distribution is handled electronically with no moving parts. This system has fewer parts that require replacement and provides a more accurately timed spark. During basic operation, the EEC-IV determines the ignition timing required by the engine and a DIS module determines which ignition coil to fire.

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The distributorless ignition system (DIS) for the 2.3L twin spark plug engine consists of the following components:
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Crankshaft Timing Sensor
The crankshaft timing sensor is a dual hall effect magnetic switch, which is actuated by the dual vane cup on the crankshaft pulley hub assembly. This sensor generates two separate signals, PIP (profile ignition pick-up) and CID (cylinder identification). The PIP signal provides base timing and RPM information, while the CID signal is used to synchronize the ignition coils. Initial timing (base timing) is set at 10 degrees BTDC and is not adjustable. Ignition Coil Packs
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Dual Plug Inhibit (DPI) is a function of the EEC-IV that is only used when the vehicle is being started at temperatures -7° C (20° F) and below. During engine cranking, the EEC-IV will only fire the spark plugs on the right hand side of the engine. When the engine has started, the EEC-IV will send a signal to the DIS module to start normal dual plug operation. Ignition Diagnostic Monitor
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Ignition module wires to coil pack

found a good repair manual and followed the wiring diagram ~~~ Thank You / Jeff
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