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Old 03-29-2019, 09:49 PM   #1
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2002 SVT no spark

So this problem as absolutely stumped me and I could use some help. Went to start the car one morning and it would crank but not start. Replaced the spark plugs and it fired right up, it drove fine for roughly 30 miles then it started misfiring horribly. I got it back home parked it and worked on it all night now the next day it won't start cranks fine. Not a single cylinder will pass a spark test. It doesn't have any check engine light and the only code in the computer is a P1000. I have tried two different coils, plug wires, crank position sensor, traced the wires that control the coil, tested the fuel injectors, and cleaned the MAF. Car has 76,000 miles on it and has completely stumped me, any suggestions would be appreciated


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Old 03-30-2019, 12:23 AM   #2
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If you are not wiping any codes by disconnecting battery the P1000 may be an indicator the PCM is amuck. The ignition 'modules' are part of it.
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Old 03-30-2019, 02:39 PM   #3
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That's kind of what I was thinking but really hoping it's not that.
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Old 03-30-2019, 02:53 PM   #4
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Whirl engine by key on and if the check engine light goes off while cranking the crank sensor is OK.

Need 12 volts at the center coil connector wire, the two outsides are each grounded by PCM to get your two sparks, the engine uses waste spark so two are going off at a time. 1-4 and 2-3 are paired together.

Have one pair of plugs out of engine and still on the plug wires and grounded at plug end and then ground one outside wire or the other for a second then unground suddenly with key turned on like the PCM does and one of them will fire the two plugs, the other fires the other two plugs. That working says coils and everything past them is good and points again at the PCM.
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Old 03-30-2019, 05:51 PM   #5
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Got it start with a new ignition switch behind the dash, however still runs terribly. Went ahead and replaced the fuel filter with no luck. Right now it's sputtering/missing at idle and at low RPM. At higher RPM (above 3k) it seems okay.
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Old 03-31-2019, 09:25 PM   #6
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P1000 is "System readiness test not complete" (ie fuel trims, cat efficiency, o2 sensor status, a lot of emission stuff) and can be ignored, its a code stored when the car gets reset and will go away with a few drive cycles

never had an svt, if it now has spark, fuel and combustion.....

last i remember they have a oil actuated solenoid driven intake cam... may want to check the plug on that, you may have knock it loose dickin with the ignitions

sputtering at low rpm, wouldnt hurt to take some carb cleaner to the IAC

other than that it wouldnt hurt to put a scan tool on it and see if any other codes (P1000 doesnt count lol)
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Old 03-31-2019, 11:57 PM   #7
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'...can be ignored...'

Read post #2 again. If owner has done nothing like disconnect battery or wipe codes to produce a P1000 then it IS a possible sign of a bad PCM, the PCM is shutting off and coming back on by itself. Possible power supply issue.
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Old 04-01-2019, 12:23 AM   #8
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that was my bad, i read #2, aaaaand it kinda glazed over..... think imma hit the rack lol
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Old Yesterday, 08:44 PM   #9
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Check the large plastic vacuum line from the back of the intake manifold to the brake booster. I’ve seen them crack and split causing a huge intake air leak. At small throttle openings it’s enough air to cause a very rough idle, if it will even run, but will run over 3,000 rpm because the air leak is balanced out by more fuel with more TPS signal. Still lean but runs and doesn’t cause the obvious lean rough idle.
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Old Today, 07:14 AM   #10
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Basically the small vacuum leak gets overwhelmed by the much larger fuel/air amounts at going off idle. It seems to disappear.
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