Question about 1998 Pontiac Trans

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Dual distributor spark plug wiring diagram for model building.

I'm making a model of a funny car that has an engine with two distributors. I like to be accurate when it comes to wiring and plumbing. I am wondering how to wire the spark plugs correctly. I am guessing there are two spark plugs per cylinder and one wire from one distributor goes to plug A of cylinder 1. and another wire from the other distributor goes to plug B of cylinder 1. and so on. If this is wrong, please let me know. Does each distributor have a coil wire and do they go to separate coils? Any spark plug wiring diagrams available for dual distributor engines? Even if it is hand drawn I'd appreciate a jpeg or pdf file of a diagram or rough drawing. Thanks, Dale

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  • Pontiac Master
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You are correct in your idea about how the plug wires are attached. If you want to duplicate control wiring you would need to obtain the wiring diagram of the brand of ignition system you want to duplicate. (MSD etc. These systems also require a small battery in order for them to operate. Wiring to distributor was far less complex when vertex type magneto distributors sere used as all that was required was a ground wire to shut them down (exactly like your lawnmower works), As far as plumbing, all systems need to meet safety standards set forth by the NHRA but aside from meeting those standards, each engine builder decides where to locate such items as primary and secondary fuel injectors etc. If you go to the NHRA website, you may be able to find a decent photo of someones engine...that may be helpful. Also check the rule book for such items as kill switch location, brake, chute release etc.

Posted on Sep 13, 2009

Testimonial: "Thank you thundergod, useful information, quick response, I will check out those web sites you suggested. Thank you very much!!!! "

  • Richard Scordino Sep 15, 2009

    Glad to help...looked around through my stuff but can't find a single photo of any of the engines I built or I'd send one to you. (can't remember where anything is anymore probably from breathing too much nitro while fighting the top fuel wars...) Good Luck!!....built a little dragster once with a old cox plane engine once while I was tinkering in the shop one day...sure wish I had it now...was fun to play with during down-time.

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I do not have a breakdown diagram for a distributor, but just the firing orders and description of ignition system for the Dodge Colt and related models (based on Chilton manuals) if that's what you're looking for: FIRING ORDERS Fig. 1: 1990 1.8L SOHC Engines Firing order: 1-3-4-2 Rotation: clockwise 84182009.gif

Fig. 2: 1.6L DOHC Engine Firing order: 1-3-4-2 Distributorless Ignition 84182010.gif

Fig. 3: 2.0L Engine Firing order: 1-3-4-2 Rotation: clockwise 84182011.gif

Fig. 4: 1.5L Engine Firing order: 1-3-4-2 Rotation: counterclockwise 84182012.gif

Fig. 5: 1993 1.8L Engine Firing order: 1-3-4-2 Rotation: counterclockwise 84182013.gif

Fig. 6: 2.4L Engine Firing order: 1-3-4-2 Rotation: clockwise 84182014.gif

To avoid confusion, replace spark plug wires one at a time. --- Distributor REMOVAL & INSTALLATION Although the distributor can be removed from the engine no matter which cylinder is about to fire, it is a good idea to have number one cylinder at TDC before distributor removal. 1.5L, 1.8L, 2.4L SOHC Engines
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    Fig. 1: Ignition system for the 2.0L engine 84183001.gif

    Fig. 2: Ignition system for the 1.5L engine 84183002.gif

    Fig. 3: Ignition system for the 1992-93 1.8L engine 84183003.gif

    Fig. 4: Ignition system for the 2.4L engine 84183004.gif

  4. Loosen the distributor retaining bolt and remove the distributor from the engine. To install:
  5. Rotate the engine until No. 1 cylinder is at TDC on its compression stroke. NOTE: Be careful not to turn it to the No. 4 cylinder TDC on its compression stroke by mistake.
  6. Align the distributor housing and gear mating marks.
    Fig. 5: Ignition system for the 1990 1.8L engine 84183005.gif

    Fig. 6: Distributor installation for the 1990 1.8L engine 84183006.gif

    Fig. 7: Distributor installation for the 1992-93 1.8L engine 84183007.gif

  7. Install the distributor into the engine, while aligning the fine cut (groove or projection) on the distributor flange with the center of the distributor mounting stud.
  8. Install and tighten the distributor retaining bolt.
  9. Reconnect the distributor harness connector.
    Fig. 8: Distributor installation for the 2.4L engine 84183008.gif

    Fig. 9: Distributor installation for the 1.5L engine 84183009.gif

    Fig. 10: Distributor installation for the 2.0L engine 84183010.gif

  10. Install the distributor cap and spark plug wires.
  11. Reconnect the negative battery cable.
prev.gif next.gif prev.gif next.gif

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Heres a Diagram of your Spark plug Positions

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1 2
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Hope This Will Get You Going. Let me know The Quality of Help and Solution I've Given You By Voting on It.And May Can Also Send a Testamony
From d_hubbs

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