electrically issues
Thread Starter
Teching In
Joined: Jun 2009
Posts: 23
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From: Orlando,Fl
electrically issues i have a 01 camaro the issues i have is a service vehicle light also the starter fuse isn't getting any power but it will turn over, also the alt exciter wire isnt getting any voltage as well. the fuel pump isnt priming either i can hear a click in front of the car and the back but nothing. prior to this i had fluctuating voltage i replaced the battery cables cleaned all the grounds. i bought a brand new battery and alt and still had issues. a charging system check said i had low starter voltage so i rechecked all of the cables again and went through them all to make sure everything had a good connection with a multimeter as well. along with the other parts i replaced the temp sensor harness. all of this happened all of a sudden the day before it was fine it was charging after i replaced everything this morning i startup its not charging i check the exciter and no voltage ive switched relays, checked all fuses i dont know what the issue is most of my sensors are new. lights everything works except the parts mentioned. i have searched everywhere on here no one seems to have similar issues.
Thread Starter
Teching In
Joined: Jun 2009
Posts: 23
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From: Orlando,Fl
does anyone know what the issue might be im wondering if the computer got messed up or something. but right now the only thing i can hear clicking on the car is the abs module and im guessing the sensor in the rear end it as a 3ch 10 bolt. the previous owner also had a diablosport hand tuner but removed it when he sold it to me. the vats is bypassed with a resister as well if any one know or has had a similar issue like im describing any help would be appreciated.
Thread Starter
Teching In
Joined: Jun 2009
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From: Orlando,Fl
yes they were in great shape i reached behind the heads and felt them theyre not loose or anything. i had the intake off last yr to do the ls6 valley cover so i changed everything that would be hard to get to the knock sensors and new harness and oil pressure switch. but all three grounds are still attached and clean if i have to pull the intake i will just to make sure everything is good
Thread Starter
Teching In
Joined: Jun 2009
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From: Orlando,Fl
ill post a vid tomorrow but the entire fuse box inside the car has power the only parts that don't are the alternator wire the temp sensor voltage is reading less than half a volt ive checked every ground and cleaned them again today including the starter area still doing the same thing. i can hear the bcm click when i turn the key before starting and as i said earlier the abs module clicks twice. ive had a abs and brake light that's been off and on since i changed the tires to a bigger size. i got the abs module read it just reported the issue but it corrects its self so i figured its just the tires setting that off. i don't remember the exact code it was but if anyone knows what can cause this let me know the fuel rails are full of fuel but no pressure as well the pumps not priming or anything. dont really want to deal with the shops in my area so if anyone can figure this out let me know.
Thread Starter
Teching In
Joined: Jun 2009
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From: Orlando,Fl
at the moment looks like pcm failure im going to buy a new engine harness and ground wires again to make sure i have no issues. i have no spark or fuel and the sensors are getting little to no power
Thread Starter
Teching In
Joined: Jun 2009
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From: Orlando,Fl
here a vid of what its doing toady i pulled the intake and checked the grounds on the driver side the were intact just a little dirty from the previous oil pressure sending unit that was on it ive checked other sensors for power no are receiving any ill pull out the pcm tomorrow and check it sd well if any one has a clue i suspect the computers gone but im not sure i cant test it yet. so let me know what you guys think.
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TECH Apprentice
Joined: Apr 2011
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From: Bahrain
no spark or fuel hmmm,
do you hear the fuel pump sound on ignition before starting the car?\
if not , then that's another problem & your issue doesn't really seem electrical as it's obvious that the pcm and everything else is on your dash else you won't see any lights.
but hey i could be wrong
do you hear the fuel pump sound on ignition before starting the car?\
if not , then that's another problem & your issue doesn't really seem electrical as it's obvious that the pcm and everything else is on your dash else you won't see any lights.
but hey i could be wrong
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Verdad Gallardo Thread Starter
Teching In
Joined: Jun 2009
Posts: 23
Likes: 0
From: Orlando,Fl
no spark or fuel hmmm,
do you hear the fuel pump sound on ignition before starting the car?\
if not , then that's another problem & your issue doesn't really seem electrical as it's obvious that the pcm and everything else is on your dash else you won't see any lights.
but hey i could be wrong
do you hear the fuel pump sound on ignition before starting the car?\
if not , then that's another problem & your issue doesn't really seem electrical as it's obvious that the pcm and everything else is on your dash else you won't see any lights.
but hey i could be wrong
Thread Starter
Teching In
Joined: Jun 2009
Posts: 23
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From: Orlando,Fl
ok so i tried to scan it with a scanner and the pcm isn't communicating with it so it looks like the computer. i tried it on both of my cars to make sure. my other vehicle is my wife's firebird so couldn't swap the comps to see. a guy from auto zone tried to argue with me when i called to purchase the tool saying even though vats is bypassed at the ignition with a resistor it can still kill the coils and fuel pump. in my experience when my key was dirty in the other car it would kill everything and the security light would be on. if anyone else thinks its not the pcm let me know and where i can get a replacement one as well. again the car is an 01 z/28 m6 and the only light thats on is service vehcle.
Thread Starter
Teching In
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From: Orlando,Fl
update sorry to spam you guys everything is working i reset the ecm it hasnt run yet to throw any codes but only two show up cause the intake is off but i will update further once the other wire harnesses are installed. i did clean the ecm connections i guess that did the trick but im still chasing this erractic voltage issue all grounds are good i will purchase another for the battery just to make sure i didnt get a cheap one and ill update thank you to the two guys that helped
Thread Starter
Teching In
Joined: Jun 2009
Posts: 23
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From: Orlando,Fl
ok so i finally got everything back up and running. it is running good except the alt charges whenever it want so im going to do the truck alt. like ive seen suggested on here. the question i have is can i use a alt relocation kit with the truck alt. as well. the only thing that may be in the way on that side is the pcv hoses i did a ls6 pcv conv but i got the older cover so the valve isnt built in its external. also i was wondering if the big 3 was neccesary or mandatory for what i want to do.