Question about 1999 Chevrolet C/K 2500

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I REPLACED A 5.7 IN A CHEVY P30 WITH A LONG BLOCK

TIMING IS DEAD ON, AND IT HAS NEW PLUGS,WIRES,CAP,AND ROTOR BUTTON. ITS NOT GIVING ME ANY CODES BUT YET THE #3,5,AND7 CYLINDERS DONT SEEM TO BE FIRING.THE PLUGS AND WIRES ARE VISIBLY FIRING BUT YET YOU PULL ONE OFF WHILE RUNNING AND THERE IS NO CHANGE IN ENGINE,LIKE YOU NEVER TOUCHED THEM....COMPRESSION IS FINE ALSO...NO VAC LEAKS THAT I CAN FIND EITHER....ANY SUGGESTIONS WOULD BE A HELP THANX AMOS

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Plugs mis fire under compression try new plugs in 3 5 and 7 even new plugs can be bad

Posted on Nov 25, 2008

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I have a miss in a 5.7 chevy replaced plugs wires timing chain mass air flagging 1,2 and 3 all have 180 compression also replaced distributor new cap and button


What year? Does it have a distributor? If so, possible distributor cap/rotor issue. If coil over plug, you need to run a compression test to see if a cylinder is weak/valve issue

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Need a diagram on how to put wires on a distributor for a 78 monte carlo motor wit a 305


The fireing order is 1 8 4 3 6 5 7 2 . Pull #1 plug bring engine up on' top
dead center if you put a finger in the plug hole you will hear and feel the engine coming up on compression and TDC, Pull dist cap and locate # 1 terrminal the rotor will be pointing at the location .Rotation on small block chevy's is clockwise start with #1 and plug the wires in. Hope this helps
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1993 chevy suburban, engine has been popping and skipping now has stopped running at all, could it be the distributor cap and rotor button have gone bad ?


its possible it needs tune up but also check the timing. alot of chevy's spit and pop and when you shut them off and go to start later they wont, this is when the timing cam gear goes bad and out of time. turn crank to top dead center (TDC) on timing mark on front of engine cover or tab first, then remove dist cap and notice where the supply point of the rotor is facing. is it pointing to the # cylinder (very front of motor on the driver side)? Or is it aiming to the plug wire location on the dist cap that goes to the # 1 spark plug. ( the front plug on the driver side of motor )? If neither of these are in line then timing is out of wak. If it's all good then check plugs for old worn or burnt electrodes then check rotor with multi testor for current travel, then check cap for electrode failure and then check plug wires for current loss and burn. then perform a compression check on motor. (dry & wet)

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1 Answer

How do you check the firing order on a chevy small block engine ?


Firing order for small block chevy is 1-8-4-3-6-5-7-2. The cylinders are numbered 1-3-5-7 on the driver's side of the engine counting front to back. Passenger side is 2-4-6-8, front to back. You will need to get #1 cylinder at top dead center on the compression stroke. To do this, remove the #1 spark plug and remove the coil wire from the distributor cap. You will need a helper for the next step. Place your index finger in the empty spark plug hole, Have your helper bump the starter with the ignition key, When #1 cylinder comes up on the compression stroke, the pressure will push your finger away from the spark plug hole. Don't worry, this doesn't hurt. Turn the key off. Check the timing mark on the harmonic balancer behind the crankshaft pulley. It should be pretty close to lining up with the "0" timing mark on the pointer attached to the engine block. Now pull the distributor cap and see where the rotor cap is pointing. This will be #1 on the distributor cap. The spark plug wire from the #1 plug will occupy that position. The next position on the distributor cap will be for the plug wire coming off the #8 cylinder. The rest of the plug wires will attach to the distributor cap in the above mentioned firing order counting clockwise. If you do not wish to place your finger in the #1 spark plug hole, you can use a piece of paper towel roll up and stuck in the hole just enough to form a seal. When the piston comes up on the compression stroke it will force the paper towel out. Any questions, just let me know.

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4 Answers

I need to know firing order for 1982 chevy van 305 v-8? was told order is 1,8,4,3,6,5,7,2 clockwise order but not sure where to begin order


put a socket on the nut for the crankshaft dampener and rotate the crank until you get to top dead center of #1 cylinder-remove the cap, the rotor is pointed to where #1 is located. you can have someone bump the starter with the key (disconnect the power feed wire to the distributor if you do this)

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3 Answers

Chev 396 backfires through carburator while starting then stalls. Is the timing Advanced and if so how do I change it enough to get the car running?


Hi wyocwboy here, Have you changed Spark Plug Wires ,or distributor Cap & Rotor? If you have this really sounds more like a Few spark Plug Wires have Been put on wrong. If you have'nt changed opr moved any of the wires or changed cap & rotor,Its Possible that your Timing Chain has jumped a Notch.Clean off your Damper -Which is the Bottom Pully your Hamonic Balacer, then rotate your enging until you Find your Timing Marks, Clean good and take a Marker or best a Chalk or Soap stick and mark it a 8 Degrees BTDC (Before Top Dead Center) Hook up a Timimg like Assuming it does run.And see if your able to see the Timing light Flashing on the mark if not Rote your Distributor either way Slowly and See if you can get the Light on the MARK you Made on The Harmonic Balancer. If Not Either Your Timing Chain Jumped a Notch or your Distributor may be off a nocth. To Check to see if your Timing Chain Jumped a Notch =Remove the COIL WIRE from Distributor Cap So it Won't Start then Remove #-1 Spark Plug Have a Friend Turn the Key off and On just Bumping the Engine a Little at a Time,Keeping a Compression Gauge in the #-1 Plug Hole When the Gauge Needle goes up you are close to TDC (TOP DEAD CENTER) STOP THERE .Check to see if the Mark on your Bottom Pully you made is at or Close to Ling up on top dead center. Trace #-1 Spark Plug Wire up to the Distributor Cap Remember the wires In the Dist. Caps Position or mark it to. Pull the Cap off The Distributor Rotor Should Be Pointing to Close to Where Your Number 1-Spark Plug Wire was Located.
Run These Series Of Tests and it Should Tell you or Give you a Very Good Idea of Your Problem. Please Let Me Know if This Helped You. FROM THE WYOCWBOY

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1 Answer

Chevy 95 g20 van 8 cylinder wiring order spark plugs


1-8-4-3-6-5-7-2 The #1 spark plug is the front spark plug on the drivers side and the cylinder location in order from front to back on the drivers side is 1-3-5-7 and on the passenger side it is 2-4-6-8. The ignition rotor rotation is clockwise.

If your Distributor cap is not numbered then replace the new wires, or transfer the old ones to the new distributor cap one wire at a time. Identify the #1 spark plug wire and start from there.

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2 Answers

1999 Tahoe 5.7L..had a blown motor, broke it down, cleaned it up, new gaskets throughout..put back together..power works, new plugs, wires, cap/rotor.. it's getting fuel and spark but not...


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3 Answers

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The firing order is 1-8-4-3-6-5-7-2.
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Good Luck

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