Subject	recheck PTU...
Posted by	puchy on March 10, 2013 at 2:12 PM
	This message has been viewed 295 times.
In Reply To	Weak to no spark when car is hot! posted by JonnyZ(SoCal) on March 08, 2013 at 01:56 PM
Message	First check for boost leaks when warmed, if it is good, then swap the #5 coil with #3, test drive and check if the problem moved with the coil. If the problem stayed on #5 check again the PTU. If you know of someone who can lend you one for a few minutes you can test drive the car and when it starts to misfire during the drive replace it with the other one. if the problem still exist, more than likely the problem will be in the harness. Now, the other remote posibility is the CAS because it's signal is used to feed the ECU, to feed the PTU, that feeds the coils, and like everything in electronics, it can fail when hot. I had something similar problem with my Impala SS, when it warm up the car shut down and ended up being the ignition module (PTU in our cars)
Follow Ups	Weak to no spark when car is hot! - JonnyZ(SoCal) 13:56:46 03/08/13 I think it may be my coolant temp sensor! - JonnyZ(SoCal) 20:06:44 03/08/13 the ecu temp sender unit is often an issue... I assume - Medallion Man 03:57:48 03/09/13 Yes, timing and tps are within spec... - JonnyZ(SoCal) 06:34:02 03/09/13 Its not going to be a Coolant sensor if you are losing spark - Joe@ZSpeedperformance 11:09:48 03/09/13 They are snug and no corrosion or anything! - JonnyZ(SoCal) 15:06:35 03/09/13 recheck PTU... - puchy 14:12:23 03/10/13 Re: Weak to no spark when car is hot! - itlnstln13 23:56:16 03/10/13 Re: Weak to no spark when car is hot! - itlnstln13 23:59:51 03/10/13
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