The next step is testing for spark directly on the ignition coil to determine if the spark plug wire is bad or if the ignition coil pack is bad. IMPORTANT: This test step applies only if you got a no-spark result in TEST 1 on: 1) only one spark plug wire or 2) two different spark plug wires that DO NOT feed two ' paired cylinders'. TEST 2: Spark Test Directly On Coil Tower 2 cylinder Robin, Robin 2 cylinder engine, Troub 2007 chevy silverado no sound from. The next round of tests will help you troubleshoot this further, go to: TEST 2: Spark Test Directly On Coil Tower. Check if one wire from the ignition coil is grounded Factory Part. This result indicates one of two things, either both ignition coil packs are bad or the spark plug wires are bad. The next round of tests will help you troubleshoot this further, go to: TEST 3: Ignition Coil Power Circuit Test.ĬASE 5: You got NO SPARK from two spark plug wires that feed 'non-paired cylinders'. 4,058 Results 8 PCS SPARK PLUGS SP493 Platinum AGSF32PM For 4.6L 5.4L V8 US NEW SP 3PCS Ignition Coil Pack For Buick Cadillac Chevy Olds Pontiac DR39 3.8L 3.4. This result indicates one of two things, either the ignition coil pack or the ignition control module (ICM) is bad. The next round of tests will help you troubleshoot this further, go to: TEST 2: Spark Test Directly On Coil Tower.ĬASE 4: You got NO SPARK from two spark plug wires that feed 'paired cylinders'. This result indicates one of two things, either the spark plug wire is bad or the ignition coil is bad. The next round of tests will help you troubleshoot them both, go to: TEST 5: Ignition Module's Triggering Signal.ĬASE 3: You got NO SPARK from only one spark plug wire. Step 2 Remove coil The coil should have two 7mm bolts holding it in on both sides. Disconnect spark plug wires along the harness for the coils. Don't use a regular spark plug instead of a spark tester. Don't pull on the wire itself, use the boot. This inexpensive spark tester is a MUST have tool to be able to correctly diagnose the Coil-On-Plug ignition coils on your GM vehicle with the info and tests in this article (don't have an HEI spark tester Need to buy one You can buy it here: OTC 6589 Electronic Ignition Spark Tester ). This result indicates one of two things, either the ignition control module (ICM) is bad or the crankshaft position sensor is bad. Step 1 Remove wire from coil Turn the wire boot 1/2 a turn and pull it out of the coil. Go to: Other Causes Of Misfires.ĬASE 2: You got NO SPARK from any of the spark plug wires. This also confirms the ignition control module (ICM) and the crankshaft position (CKP) sensor are working correctly. This test result indicates all of the ignition coil packs are good. Let's take a look at what your test results mean:ĬASE 1: You got spark from all spark plug wires. as u can tell, just a novice wannabe mechanic.Repeat this spark test on the remaining spark plug wires. Did turning on the engine without the air intake cause my problem.Im somewhat confident I put everything back and put the plugs in ease help?.p.s. I installed the rest of the new sparkplugs ( thinking the whole time that I sould of never have turned the engine on until i was done). Thinking that I got the wrong spark plugs, I put back the old spark plugs with no improvement.The one thing I did ,from old habbit of changing plugs and maybe the cause of my problem ,is after i first installed new #1 sparkplug and without putting and connecting the air intake resonator back on first, I turned on the engine to see if the sparkplug I just installed was put in properly well afte a few seconds the engine made a strange noise that I knew did not sound right so I quickly turned off the engine. If your coil reads under 11.00, then chances are pretty good that this is the reason you're not getting any spark or a very weak one. The reading here should be 11.00 or better, with 13.49 being about normal. It is now idling rough, vibrating and check engine light turned on (flash initially now steady light). Switch the meter's resistance range to the 20K-ohm setting and attach the negative (black) meter lead to the center terminal of the coil. Truck (109,000 miles) was idling smooth until after I changed the orignal sparkplugs tonight.
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