Question about 1998 Chevrolet K2500

1 Answer

Rebuilt my 454 engine, installed distributor with rotor at 0 TDC on #1 cylinder. Engine ran fine but ses light was on. Code was P1345-- disagreement between cam sensor and crank sensor. Scanner showed anywhere from 19 to 25 degrees advanced. Rotated dist. shaft. to ****** timing. Wouldn't run. Tried two teeth positions in either direction from original setting. Ever have a sensor go bad. The crank sensor is new, cam (on distributor) is not.

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Zaraki

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The ignition timing is not adjusted with a timing light or with the engine running, and to set the ignition timing follow these procedures.

There is a mark or notch on the distributor housing that the rotor should be pointing to when the engine is on TDC. (Top Dead Center) This "Static" timing is all that matters and the computer will be able to control the timing as long as the ignition rotor is in that position when the engine is at TDC.

1. Place the engine at top dead center.

2. Look under the distributor cap and find where the number one terminal runs under the distributor cap, and where that position on the distributor cap corresponds with the distributor housing, and it should match up to a mark or a notch on the distributor housing (usually has a #6 for 6 cylinder engines or a #8 for 8 cylinder engines) indicating the number one TDC alignment position.

3. With the engine on top dead center the ignition rotor should be pointing to the number one TDC alignment mark or notch that is on the distributor housing, if it is not then loosen up the distributor and turn the distributor until the ignition rotor is pointing to and aligned with the TDC alignment mark or notch on the distributor housing and then tighten down the distributor, the engine should now be "Static" timed. (The more precise that you are aligning the TDC alignment mark with the ignition rotor the better the engine will run, and it will be less likely that there will be a camshaft to crankshaft correlation problem)

If the distributor can not be turned enough to align the ignition rotor with the number one TDC alignment mark on the distributor housing, or the distributor does not set properly and will not allow the installation of the spark plug wires then the distributor is not installed correctly and is most likely a tooth off and it will need to be re-installed correctly. (The distributor should set like it is shown in the firing order diagram when it is properly installed)

Here is a firing order diagram to also help assist you.




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Posted on Oct 25, 2010

  • 1 more comment 
  • Zaraki Oct 25, 2010

    Some distributors have the hold down bracket secured onto the distributor housing and the distributor can not be turned into alignment and then tightened down into that position, and these distributors will only fit into the engine and correctly align on "Static" timing one certain way, and when it is correct the distributor hold down bracket bolt can be installed and the TDC alignment mark on the distributor housing will remain properly aligned with the ignition rotor.

  • Anonymous Oct 27, 2010

    I appreciate your feedback. It has not made much of a difference yet, but it did confirm that I had done everything right so far, at least mechanically. As I said at first, we set everything right but when the scanner showed advanced timing, we started messing around with the distributor. Nothing worked and the values got silly, jumping between values-- all advanced even though we retarded it two notches at one point. Today I replaced the cam sensor. Same problem. The killer for me is that when we first fired it up it ran great but the ses was on. Trying to fix it has made it unrunnable even though it's physically back where we started when it ran. I'm thinking there is some wiring problem or god forbid a computer module problem. Any ideas?

  • Anonymous Oct 27, 2010

    Well, we solved it (after throwing a few parts at it). I had seen other posts on other sites talking about worn camshaft, worn distributor shaft, worn timing chain, etc. but none of these looked bad in my engine and the timing chain was new. It turns out that there is a washer between the lower end of the distributor shaft housing and the upper part of the helical gear. Even though everything looked all right, over the 120K miles the parts had worn enough for there to be about a 3/32 worth of slop in that washer area. When the engine cranked and the camshaft gear engaged the distributor gear, it pushed it up that 3/32 which was enough to move the rotor out of range of the computer's ability to compensate. When we moved the dist a whole notch, it was way out. The fix could have been a new distributor, but we were able to find a washer that filled the space perfectly without binding. Put it back in. It fired up and no ses light. I can now take off a coil and remove a distrubutor on a 98 Silverado in my sleep.

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2 Answers

I have 351 motor and have tdc but the rotor is pointing toward #8 is that right?


Depends.
If you have tdc on the number one cylinder, and it is tdc on the compression stroke, then the rotor should be close to cyl one.
A four cycle engine has four up and down strokes, compression, power, exhaust, and so on.
Depending on the make model and year, the firing order could be 1-3-7-2-6-5-4-8 which would mean the timing chain or the distributor is one cylinder too far advanced if it is pointing to number 8.

Mar 29, 2015 | Cars & Trucks

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How to reset timing on 1992 454 tbi after replacing distributer


You have to put the number 1 cylinder at Top Dead Center of the compression stroke, and then you install the distributor with the rotor pointing to the #1 spark plug wire tower that is on the distributor cap.

Pull the spark plug from number 1 cylinder. You need a helper to turn the engine over by hand (using a socket on the crank pulley), or he can bump the starter over in very short bursts. Put your finger over the spark plug hole. When the piston is rising on the compression stroke, you will feel air pressure on your finger. Now look at the crank pulley and turn the engine on over until the zero degrees mark lines up on the timing pointer. Or you can stick a long straw or similar into the spark plug hole (don't let it drop into the cylinder!) to feel when the piston is at top of travel...see, you feel for pressure build up with finger (piston is rising on compression stroke), when you feel it, turn engine on over by hand until the piston is at top of travel-that is TDC of compression stroke. Now install distributor so that rotor ends up pointing directly to number 1 spark plug wire tower. Then follow firing order -as the rotor turns, it will follow the firing order around the dist. cap.
There are two top dead centers of each piston, tdc of compression stroke and tdc of exhaust stroke- to time the engine, you need tdc of compression-that is when the spark plug fires in the cylinder, so that is when you want the distributor in with the rotor pointing to #1.

Jul 28, 2014 | 1992 Chevrolet C/K 3500

1 Answer

I removed the distributor and can't seem to get it back in time, have spark, no blown fuses, at TDC rotor is lined up with number 1


Honda CRV/Odyssey 1995-2000 Repair Information
Distributor

Print


REMOVAL & INSTALLATION

The radio may contain a coded theft protection circuit. Always make note of the code before disconnecting the battery.

  1. Disconnect the negative battery cable.
  2. Access the crankshaft pulley bolt through the left side inner fender liner. Use a socket, long extension and a suitable ratchet to rotate the engine. Rotate the engine counterclockwise until the white Top Dead Center (TDC) mark on the pulley aligns with the pointer on the engine cover.
  3. Label the ignition wires, but do not remove them.
  4. Remove the distributor cap and note the location of the ignition rotor. If the ignition rotor is not pointing toward the terminal of the distributor cap for cylinder No. 1, rotate the crankshaft one complete revolution counterclockwise, and align the white (TDC) mark on the pulley with the pointer on the engine cover.
  5. If the distributor is going to be reinstalled, make an alignment mark between the distributor housing and the cylinder head using a scribe or a chisel. Then, and using a scribe, felt tipped marker or touch up paint, make an alignment mark on the distributor housing for the rotor.
  6. Uncouple the electrical connectors on the side of the distributor.
  7. Remove the three distributor mounting bolts, then remove the distributor from the cylinder head.

See Figures 1, 2 and 3

0900c1528026a5f0.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 1: Exploded view of the distributor mounting-Odyssey 4-cylinder models


0900c1528026a5f1.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 2: Exploded view of the distributor mounting- CRV shown


0900c1528026a5f2.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 3: The distributor keyway is offset and can only be installed in one direction

To install:
If the camshaft or crankshaft has rotated during assembly, rotate the crankshaft counterclockwise until the white Top Dead Center (TDC) mark on the pulley aligns with the pointer on the engine cover. If the valve cover and upper timing cover have been removed, be sure the UP mark on the camshaft is facing up, and that the crankshaft TDC mark aligns with the pointer on the lower timing cover.

  1. Coat a new O-ring with clean engine oil and install it onto the distributor shaft.
  2. Install the distributor into the cylinder head. The offset lug on the distributor shaft will fit into the groove on the end of the camshaft in only one direction. If the distributor is being reinstalled, align the marks made during disassembly.
  3. Install the three mounting bolts, only hand-tighten them at this time.
  4. Couple the electrical connectors on the side of the distributor.
  5. If removed, reconnect the ignition wires in the correct order.
  6. Reconnect the negative battery cable.

The Powertrain Control Module(PCM) idle memory must be reset after reconnecting the battery. Start the engine and hold it at 3000 rpm until the cooling fan comes on. Then allow the engine to idle for about five minutes with all accessories OFF and with the transaxle in Park or Neutral.
  1. Check and adjust the ignition timing. Refer to the ignition timing procedure outlined in General Information and Maintenance .
  2. Enter the radio security code.

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2 Answers

Replaced distributor and new one would not line up. Lined up rotor as best I could and tried to start. Ran rough and horn beeped twice!. Removed, put at TDC and lined up rotor with #1 plug. Now engine...


wow the engine timing is definatly off. first things first are you sure you have correct replacement distributor? you may have the timing 180 degrees off, the easiest way to set tdc is remove #1 spark plug insert long handle screw driver and then line up 0 degree timing mark on crank shaft pulley to timing cover while watching screwdriver to raising as high as possible, this is ensuring that the #1 piston is all the way up. now you are surely on tdc. at this point remove distributor cap and se what cylinder # the rotor is pointing to. the firing order is 1,5,3,6,2,4 with the rotor moving in a clockwise motion here is a picture to help.cables.jpg if the rotor is not pointing which i doubt it will be remove distributor and re install with rotor pointing towards cyl. #1. hopr this was helpful if so please rate positive.

Dec 04, 2010 | 1993 Jeep Grand Cherokee

1 Answer

I need to know how to set the distrubtor


The ignition timing is not adjusted with a timing light or with the engine running, and to set the ignition timing follow these procedures.

There is a mark or notch on the distributor housing that the rotor should be pointing to when the engine is on TDC. (Top Dead Center) This "Static" timing is all that matters and the computer will be able to control the timing as long as the ignition rotor is in that position when the engine is at TDC.

1. Place the engine at top dead center.

2. Look under the distributor cap and find where the number one terminal runs under the distributor cap, and where that position on the distributor cap corresponds with the distributor housing, and it should match up to a mark or a notch on the distributor housing (usually has a #6 for 6 cylinder engines or a #8 for 8 cylinder engines) indicating the number one TDC alignment position.

3. With the engine on top dead center the ignition rotor should be pointing to the number one TDC alignment mark or notch that is on the distributor housing, if it is not then loosen up the distributor and turn the distributor until the ignition rotor is pointing to and aligned with the TDC alignment mark or notch on the distributor housing and then tighten down the distributor, the engine should now be "Static" timed. (The more precise that you are aligning the TDC alignment mark with the ignition rotor the better the engine will run, and it will be less likely that there will be a camshaft to crankshaft correlation problem)

If the distributor can not be turned enough to align the ignition rotor with the number one TDC alignment mark on the distributor housing, or the distributor does not set properly and will not allow the installation of the spark plug wires then the distributor is not installed correctly and is most likely a tooth off and it will need to be re-installed correctly. (The distributor should set like it is shown in the firing order diagram when it is properly installed)

Here is a firing order diagram to also help assist you.

Some distributors have the hold down bracket secured onto the distributor housing and the distributor can not be turned into alignment and then tightened down into that position, and these distributors will only fit into the engine and correctly align on "Static" timing one certain way, and when it is correct the distributor hold down bracket bolt can be installed and the TDC alignment mark on the distributor housing will remain properly aligned with the ignition rotor.


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When setting the ignition timing on a 1991 ford ranger 3.0 were dose the rotor need to point, after number one or before number one? the engine is on top dead center


The engine timing markers down on the harmonic balancer/crankshaft pulley should be aligned with the timing indicator on the engine block to "0" degrees when the engine is in the compression stroke for the #1 cylinder, and this is TDC or "Top Dead Center". When something blows out of the spark plug hole that only means that the piston is coming up on TDC, but the crankshaft will still have to be turned until the timing markers are at "0" degrees. You should be sure that you do know how to properly align the timing marks to "0" degrees, and the timing marks must be set at "0" degrees before the distributor can successfully be installed.

Be certain that the timing marks are set at "0" degrees and on the compression stroke for the #1 cylinder, or the timing will be 180 degrees off when you install the distributor. This has to be precise and guessing will not get the distributor properly clocked in so that the ignition timing can be correctly set.

Once you are certain that the timing is set to "0" degrees "TDC", then mark the distributor housing where the #1 position on the distributor cap will be when the cap is installed on the distributor, so that the distributor housing shows a reference mark where the #1 position is, then the distributor should be installed so that the ignition rotor is pointing directly at the #1 position on the distributor housing, or just before the #1 position mark according to the rotation of the ignition rotor. The distributor should be able to turn and point the ignition rotor on either side of the #1 position mark to provide plenty of timing advance or ****** so that the ignition timing can properly be adjusted to specifications after the engine has been started.

Be sure that you follow the proper timing procedure for that vehicle and remove any timing spout connectors that are described in the set timing procedures

Also, be certain that you are actually using the #1 cylinder to set the engine to TDC and to actually time the engine with a timing light. Here is a firing order diagram that should also help to assist you. Let me know if you require any further assistance.






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Missing distributer, How do I install another one?


drive it to a shop and have them do it. What will happen is you wont be able to position it correctly without a data scanner. You don't set timing on these like an old truck. You need to cam sync it which requires a scanner to show postion and then you rev the engine while checking the position which ideally should be at zero plus or minus 2. Just hope this is your problem before you go to this expense to replace the distributor. If you have a MIS i'm doubting its the distributor if you already replaced the cap and rotor.

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1 Answer

Need to know how to install a new distributor and the firing order for a 4 cyl


Firing order is 1342. #1 cylinder is closest to front. (By pulleys)



See Figures 1, 2, 3 and 4
Engine Not Rotated
  1. Disconnect the negative battery terminal.
  2. Turn the engine over until No. 1 cylinder is at TDC of the compression stroke.
  3. Remove the distributor cap. Remove the wire harness connected to the side of the distributor.
  4. Mark the position of the distributor base in relation to the engine block with white paint or other suitable marking material, for reference when reinstalling the distributor.
  5. Loosen and remove the distributor hold-down bolt and clamp.
  6. Carefully begin lifting the distributor up and out. Once the shaft is clear of the engine compartment, inspect the shaft for cracks in the O-seal, the condition of the shaft drive gear and any other part which could lead to distributor problems in the future.

To install:
  1. Check to make sure the engine is still at TDC. Inspect distributor shaft hole to make sure it is free of dirt.
  2. Rotate distributor shaft until the painted mark on rotor is pointing toward painted mark on engine block made during removal.
  3. Continue rotating rotor slightly so leading edge of the vane is centered in vane the switch stator assembly.
  4. Dip entire distributor gear in engine assembly lubricant D9AZ-19579-D or equivalent.

If installing a new distributor, ALWAYS add engine assembly lubricant to the engine oil by pouring it through distributor hole onto the camshaft gear. Run engine at idle for at least five minutes before driving.
  1. Rotate distributor in block to align leading edge of vane and vane switch stator assembly. Verify rotor is pointing at No. 1 mark on distributor base.

If vane and vane switch stator cannot be aligned by rotating distributor in cylinder block, remove distributor enough to just disengage distributor gear from camshaft gear. Rotate rotor enough to engage distributor gear on another tooth of the camshaft gear.
  1. Install the distributor retaining bolt and tighten so the distributor can just barely be moved.
  2. Install the distributor cap and, tighten screws to 18-23 inch lbs. (2.0-2.6 Nm).
  3. Reconnect battery cable. Start vehicle, and check timing. If timing needs adjustment, refer to the Ignition Timing section.
  4. After timing has been set, tighten distributor hold-down bolt to 17-2 ft. lbs. (23-34 Nm).

Engine Rotated with Distributor Removed
  1. If the crankshaft was rotated while the distributor was removed, the engine must be brought to TDC on the compression stroke of the No. 1 cylinder.
  2. Remove the No. 1 spark plug. Place a finger over the hole and rotate the crankshaft slowly in the direction of normal rotation until engine compression is felt.
  3. When engine compression is felt at the spark plug hole, indicating that the piston is approaching TDC, continue to turn the crankshaft until the timing mark on the pulley is aligned with the 0 mark on the engine front cover.
  4. Turn the distributor shaft until the ignition rotor is at the No. 1 firing position.
  5. Rotate distributor shaft so the blade on rotor is pointing toward paint mark on distributor base made during removal.
  6. Continue rotating rotor slightly so leading edge of the vane is centered in vane switch stator assembly. Verify rotor is pointing at No. 1 mark on distributor base.

If vane and vane switch stator cannot be aligned by rotating distributor in cylinder block, remove distributor enough to just disengage distributor gear from camshaft gear. Rotate rotor enough to engage distributor gear on another tooth of the camshaft gear.
  1. Install the distributor retaining bolt and tighten so the distributor can just barely be moved.
  2. Install the rotor and distributor cap and connect all wiring. Tighten distributor cap to 18-23 inch lbs. (2.0-2.6 Nm).
  3. Reconnect battery cable. Start vehicle, and check timing. If timing needs adjustment, refer to the Ignition Timing section.
  4. After timing has been set, tighten distributor hold-down bolt to 17-2 ft. lbs. (23-34 Nm).

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intake gasket i had the same problem with my truck

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Well that sounds like a tough one , But here is a site worth checking out . Several mechanics use this it to help out people like your self that are frustrated and are getting P #$%$# off ! Good luck

http://www.obd-codes.com/forums/search.php?search_id=active_topics

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