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Need Help With No Spark!

wa04compg

wa04compg

New member
Hey guys went on a trip this weekend when I went to leave I stopped to get some food when I went out 10 min later it would turn over but would not fire...I disconnected the battery for around 10 mins still no start...checked fuel rails and there is fuel in them and I can hear the pump prime...checked for spark and there was no spark...code popped up on my aeroforce as a PO520 oil sensor/switch...ended up having it towed to the inlaws and got to work on changing some stuff...I changed oil sensor/switch, Ignition control module, and crank sensor....still no spark! My friend hooked up HPT and when I turn it over RPM is showing 0...if the cam sensor is toast can it cause this issue...also we switched coil packs and module from his running car onto mine and still no spark...we ended up putting the stock tune back on it and it still wouldn't start....we ended up checking the voltage going into the ICM and it was showing only 4v instead of 12v...I ended up running out of time and had to rent a car to get home...car is 5 hours away so I am trying to get any ideas before I drive back this coming weekend to work on it...If anyone has any ideas I would love to hear them because I am stumped at this point...Toby
 


Fivefingerdeathpunch said:
Make sure the ICM ground is hooked up.

It could be a faulty Cam or Crank sensor causing this too.
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I found what I think is the ground wire for the ICM...was a wire running out of the bundle that goes towards the ICM and it it bolted under the snout down towards the block...it seemed to be intact...also could a brand new crank sensor be bad...I already changed the crank sensor...also will they throw a code if either crank or cam sensor is bad because I have no codes for either
 
I had this issue recently when I put my car back together. The problem was a grounded wire, under the coil bracket. Simple fix. So, check for any wires that may be frayed and grounded.
 
Cool I will be checking all the grounds and pulling out the voltmeter this weekend to try and isolate my issue
 


Anyone know if the ignition can go bad but still crank over? Like it will operate the starter but not provide the ignition system with 12v
 
SDGTP99 said:
I had this issue recently when I put my car back together. The problem was a grounded wire, under the coil bracket. Simple fix. So, check for any wires that may be frayed and grounded.
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It wear through the wire protector? It does seem like its a short...it did this to me about 3 months ago but after leaving the battery unhooked for around half hour it started...this time is deff has no interest in starting
 


Yeah I am driving over tonight and will be checking voltage on all the sensors and icm...need to figure this out and get it back on the road
 
Ok guys I finally fixed the car...ended up being a failed fuse box...the metal tabs inside the fuse box on #24 Elec/Ign fuse broke so the fuse was only getting a conection on one side...was so confused because both sides of the fuse had 12v but then 6in down the wiring harness it had none...anyways got a fuse box at the wrecking yard started right up...had to case relearn the crank sensor then headed home...on the 5 hour drive temp gauge stopped working lol but I will start a new thread about that new issue
 
Restart the car a couple of times on the temp sensor. Sometimes when you tune/crank learn etc...they can do that. Drunkies did.
 
BillBoost37 said:
Restart the car a couple of times on the temp sensor. Sometimes when you tune/crank learn etc...they can do that. Drunkies did.
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Really? I restarted it about 3 times so far...when my friend tuned it he dropped the fans to 180 turn on but I think that is to low since I don't have a 180 tstat yet...might need to put them back to stock
 


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