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Thread: No Spark
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04-19-2013, 06:18 PM #1
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No Spark
Im at a loss, I am having a issue with my 96 T/A the car will start up fine when its cold but as it runs and heats up (20 min or so) the car just shuts down, then when I try to re-start it it might kick once but then no spark, I have replaced the opti, coil,icm,crank sensor, and just now the knock sensor and connector and Im getting 5volts to the knock sensor, what else can I try im at a loss. I just let it run for about 30 min in the drive way and it did fine moved it back in the garage shut it off then tried to restart it it fired up after 2 cranks. I let it sit for about 20 mins. tried to restart 2 kicks then back to no spark. Has anyone else had this problem. The car ran fine then I pulled the headers off to be recoated went to put back on now im having this issue
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04-19-2013, 08:21 PM #2
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Did you check the opti harness?
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Jesse
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04-24-2013, 11:04 PM #3
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fix it yet?
any codes?
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04-25-2013, 06:11 AM #4
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Seems to be leading back to the ICM, IMHO. Did you do the cooling mod on it? You might try to exchange it with a known good one ... just thinking out loud.
94 Z28 LT1 M6 - SOLD
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04-25-2013, 06:51 AM #5
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The optic on my project car recently gave me fit similar to this. It would run for awhile and then no spark. Could be a possibility. Bought a new one a fixed the problem. Just a suggestion. After I let it sit a few it would start up. Could run five minutes or 30 but would eventually die out.
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04-25-2013, 07:30 AM #6
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04-27-2013, 05:39 PM #7
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I did the icm cooling mod a long time ago, I just got a new opti wire harness(the only thing that I hadn't replaced) the voltage is showing what they said on on shbox then I checked the ohms on the new harness and is reading .3-.4 on all wires and did the same check on the old harness and term A .5 term B .3 c .4 d. .6
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04-27-2013, 10:31 PM #8
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Have you scanned it for codes?
SOLD - GONE TO A (VERY) GOOD HOME ! - 94 Formula A3+1: 381ci forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / CC solid roller / TH400+GearVendors OD / 4.11 Strange 12-bolt / 300-shot N2O / Spohn Suspension / roll bar / MoTeC M48 Pro engine management system /a few other odds 'n ends.
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04-30-2013, 06:20 PM #9
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i put on a new opti harness still the same it is throwing a random miss fire I have a new icm, coil and a new opti but I went cheap and got a cardon crap still same issue, long story short the car ran fine then I was getting ready for the t/a nats pulled headers and valve covers etc. to be re chromed and the headers re coated, then a month later i put everything back on and now this issue I had a accel opti on it so thinking that this was the issue I bought the cheap 1 to get me by but no luck .
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