Every now and then when attempting to start my 4 cyl 2001 S-10, nothing happens. After about 5 to 10 key turns then it fires up. Until this week, it was over 40 minutes and about 100 key turns did it fire up. The electrical relay under the hood appears to be working ok as it "connects" with every key turn. No clicking or other sounds. I'm under the car now and looking to remove and test the starter, but it appears to be a major surgery. Any ideas before I proceed?
Thanks, Big Gee
Connections are the most common either on the battery or the starter solonoid. Next would be a starter, but you would usually get a click down on the flywheel where the starter engaged but could not turn over. Finally an ignition switch, unlikely but contacts there do sometimes go bad there as well.
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Your crankshaft turns 2x times the camshaft. Put it this way as # 1 cylinder reaches TDC (top dead center) of the firing/compression stroke, and this will be after a (8 degs BTDC) spark to ignite the air/fuel mix, the # 3 cyl. will be at BDC of the intake stroke and as #1 begins its power down stroke, (during explosion of air/fuel mix), #3 begins its compression up stroke, the #4 cyl. will be coming down with #1 cyl. but #4 will be in the beginning of its intake down stroke, and #2 cyl. will be coming up with #3 but #2will be in its BDC of the exhaust stroke. Which has just fired previously to #1. 1342134213421342 etc.
Now the cam turns to open / close the valves;
In the outline above, #1 cyl. valves will both be closed. #3 cyl. will have the intake starting to close at this point. #4 cyl. will just be starting to open its intake valve, and #2 will be starting to open its exhaust valve. Is all this clear as mud? So as the crank makes one full rotation (in a 4cyl. engine) only the firing of one cylinder has happened.and at every rotation one cyl. will fire. So #1 at TDC then one full rotation, #1 back at TDC, but this TDC is half of its 4 cycles, (1)Intake, (2)compression, (3)power, (4)exhaust. this 1234 refers to the 4 cycles of the rotation not firing order.
My sincere apologies for the delayed response. I am personally going back to answer your unanswered questions. I have only been a free contributor to this site for the past 4-months.
I do not know if you still need this information, but I am going ahead and answering it anyway.
I do not know if you have the 2.5L (4-Cyl), 2.8L (6-Cyl), or the 3.8L (6-Cyl); however I have included all three below.
For the 2.5L (4-Cyl) Firing Order: 1-3-4-2 Cylinders: (back of engine) 1-----2-----3-----4 (front of engine) Ignition Connections: (back) o <-----1 o <-----4 ___ o <----2 o <----3 (front)
For the 2.8L (6-Cyl): Firing Order: 1-2-3-4-5-6 Cylinders: (back of engine) 1--------3--------5 2--------4--------6 (front of engine) Ignition Connections: .........(back) |.1..4.|.|.6..3.|.|.2..5.| .........(front)
For the 3.8L (6-Cyl): Firing Order: 1-6-5-4-3-2 Cylinders: (back of engine) 2------4-------6 1------3-------5 (front of engine) Ignition Connections: Type I: (back) 6..2..4 3..5..1 (front) Type II: (back) |.3..6.|.|.2..5.|.|.4..1.| (front)
Let me know if this helped, or if you have any additional information or questions. Feel Free to contact me at FixYa.com!
The fab key activates the security system in the car, the ignition pass lock may need to be reset to your ignition key's. It Takes about 30 min to do. Try resetting the pass lock to read your ignition keys.
30-Minute Learn Procedure
1. Turn ON the ignition, with the engine OFF.
2. Attempt to start the engine, then release the key to ON; the vehicle will not start.
3. Observe the SECURITY tell tale light. After approximately 10 minutes, the light will turn OFF.
4. Turn OFF the ignition switch, and wait 5 seconds.
5. Repeat steps 1 through 4 - two more times - for a total of 3 cycles of 10 minutes. 3x10 = 30 minutes.
The vehicle is now ready to relearn the Passlock Sensor Data Code and/or passwords on the next ignition switch turn from OFF to CRANK.
Turn the Ignition Switch OFF.
The vehicle learns the Passlock Sensor Data Code and/or password on
the next ignition switch transition from OFF to CRANK. You must turn the ignition
OFF before attempting to start the vehicle.
6. Start the engine. The vehicle has now learned the Passlock Sensor Data Code
7. With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100
Without a scan tool you may have momentary starter interruptions while history clears itself.
Good luck and hope this helps. The ignition keys has a resistor value for the ignition to read and after a few years the resistance may change and the Pass Lock has a had time reading it's value so you have to reset the pass lock to read the keys again.
it sounds like you may have the wires on the wrong coil. It should be #1 on the #4 coil, and the #3 wire on the #2 coil. you probably have them backwards so 1 and 3 are firing on the exhaust stroke. the firing order is 1-3-4-2. they should be hooked like this.