Anytime brother!! 
IMPORTANT ELECTRICAL INFORMATION (Long!)
Race Director
Joined: May 2001
Posts: 16,106
Likes: 473
First, clean all key resistor chips with alcohol. Then try your spare key (does it have a fob?). Then try replacing the main fob battery and re-try with the key that comes with it. No joke, it could be as stupid as that. Those are super cheap go-to ideas. And check the driver side rear wheel well chassis ground, you can see it if you look in closely by the tire. That's an important gorund, the fob ground if I recall one of the posts on this thread.
That ground in my car turned out to be a crusty mess. Mechanic took apart, cleaned, back nice and fresh. Can't say my no-start issues we're fixed by doing that, because he cleaned up and re-assembled several other crusty ground locations and connectors that might have been a cause also.
But, just thought I'd offer up a couple of simple suggestions having recently gone thru no-start mayhem.
Good luck!
That ground in my car turned out to be a crusty mess. Mechanic took apart, cleaned, back nice and fresh. Can't say my no-start issues we're fixed by doing that, because he cleaned up and re-assembled several other crusty ground locations and connectors that might have been a cause also.
But, just thought I'd offer up a couple of simple suggestions having recently gone thru no-start mayhem.
Good luck!
Thread Starter
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I am asking a slightly different question. Not every one of the ground connections are "connectors" that you have to take apart and clean out. Some are just a single wire or two attached to a lug to the frame. I am trying to find out how many are there of the "connectors" for multiple ground wires that you take apart, clean, and use dielectric grease on before putting plugging them back together. There are one each near the headlights, but I am wondering where there are other "connectors" located for multiple ground wires, not the single lug connections. Or are the two near the headlights the only ones?
There are FOUR ground connectors inside the cabin. By each seat belt retractor and at the base of each door A pillar ( you have to remove the sill plate cover to see them) The rest are eyelets. The ones inside the cabin are rarely an issue unless you have a very wet interior.
5th Gear
Joined: Mar 2019
Posts: 5
Likes: 1
From: Moab Utah
Guys!
I have to say, Bill Curlee saved my car and my wallet!
He was gracious to call me the other night, and we went through a few things and he then simply said "It's your ignition switch."
I'm like "How can that be, the car only has 19,000 miles on it?"
But I took his advice, and removed the switch. I ordered a new switch, but then figured, I may as well take this apart and see whats what... So I did, and then I saw the burned areas. Killing time, I cleaned it all up with fine grit wet sandpaper, put it back together, and plugged in. And to my amazement, the car immediately started and sprang to life! Everything's working, just like a new car.
A BIG thanks to Bill on this! I'd bet I would have been into the dealer for a couple thousand $$ not to mention them messing up my nice interior, and dash...
I have to say, Bill Curlee saved my car and my wallet!
He was gracious to call me the other night, and we went through a few things and he then simply said "It's your ignition switch."
I'm like "How can that be, the car only has 19,000 miles on it?"
But I took his advice, and removed the switch. I ordered a new switch, but then figured, I may as well take this apart and see whats what... So I did, and then I saw the burned areas. Killing time, I cleaned it all up with fine grit wet sandpaper, put it back together, and plugged in. And to my amazement, the car immediately started and sprang to life! Everything's working, just like a new car.
A BIG thanks to Bill on this! I'd bet I would have been into the dealer for a couple thousand $$ not to mention them messing up my nice interior, and dash...
Last edited by ckcarr1; Apr 19, 2019 at 11:51 AM.
Racer
Joined: Jul 2012
Posts: 266
Likes: 6
From: winnipeg manitoba
2004 z06
went to start her up after winter hibernation cranked it for a few seconds first to get oil pressure up before starting
and then went to start it fired right away but was short lived started to shudder and sputter and died wont start now cranks no prob
but wont fire
odes are as folows
P0120
p0220
p0300
p1516
checked all fuses inside and out
scaner shows 14% throttle at what should be idle and momentary 100% at wot
i can hear the throttle open and close
removed tps checked for debris all clean
checked battery
not sure where to go from hear
????????
went to start her up after winter hibernation cranked it for a few seconds first to get oil pressure up before starting
and then went to start it fired right away but was short lived started to shudder and sputter and died wont start now cranks no prob
but wont fire
odes are as folows
P0120
p0220
p0300
p1516
checked all fuses inside and out
scaner shows 14% throttle at what should be idle and momentary 100% at wot
i can hear the throttle open and close
removed tps checked for debris all clean
checked battery
not sure where to go from hear
????????
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Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,416
Likes: 3,972
From: Cape Coral, Florida
2004 z06
went to start her up after winter hibernation cranked it for a few seconds first to get oil pressure up before starting
and then went to start it fired right away but was short lived started to shudder and sputter and died wont start now cranks no prob
but wont fire
odes are as folows
P0120
p0220
p0300
p1516
checked all fuses inside and out
scaner shows 14% throttle at what should be idle and momentary 100% at wot
i can hear the throttle open and close
removed tps checked for debris all clean
checked battery
not sure where to go from hear
????????
went to start her up after winter hibernation cranked it for a few seconds first to get oil pressure up before starting
and then went to start it fired right away but was short lived started to shudder and sputter and died wont start now cranks no prob
but wont fire
odes are as folows
P0120
p0220
p0300
p1516
checked all fuses inside and out
scaner shows 14% throttle at what should be idle and momentary 100% at wot
i can hear the throttle open and close
removed tps checked for debris all clean
checked battery
not sure where to go from hear
????????
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,416
Likes: 3,972
From: Cape Coral, Florida
2004 z06
went to start her up after winter hibernation cranked it for a few seconds first to get oil pressure up before starting
and then went to start it fired right away but was short lived started to shudder and sputter and died wont start now cranks no prob
but wont fire
odes are as folows
P0120
p0220
p0300
p1516
checked all fuses inside and out
scaner shows 14% throttle at what should be idle and momentary 100% at wot
i can hear the throttle open and close
removed tps checked for debris all clean
checked battery
not sure where to go from hear
????????
went to start her up after winter hibernation cranked it for a few seconds first to get oil pressure up before starting
and then went to start it fired right away but was short lived started to shudder and sputter and died wont start now cranks no prob
but wont fire
odes are as folows
P0120
p0220
p0300
p1516
checked all fuses inside and out
scaner shows 14% throttle at what should be idle and momentary 100% at wot
i can hear the throttle open and close
removed tps checked for debris all clean
checked battery
not sure where to go from hear
????????
EDIT: PCM fuse 16 also feeds Ignition Relay 42 which feeds injectors,and coils...the LOAD side of ignition relay 42 feeds Throttle Control fuse #17...connect your voltmeter red lead to battery positive and the black lead to one of the test points on Fuse 16...crank engine and read the voltage drop...should be around .01 to .02...now try it on fuse 17...you should see the same voltage...I would even swap out ignition relay 42 with another in the fusebox !!
EDIT:
Last edited by C5 Diag; May 1, 2019 at 02:15 PM.
Racer
Joined: Jul 2012
Posts: 266
Likes: 6
From: winnipeg manitoba
so far these are my findings like before checked all fuses swapped relays no difference haven't checked voltages yet
but i now know i have no fuel pressure worst case scenario fuel pump but have to check all grounds and wiring before jumping to conclusions
also swapped tps
a work in progress
will keep posting as i make findings
thank you for input
but i now know i have no fuel pressure worst case scenario fuel pump but have to check all grounds and wiring before jumping to conclusions
also swapped tps
a work in progress
will keep posting as i make findings
thank you for input
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,416
Likes: 3,972
From: Cape Coral, Florida
so far these are my findings like before checked all fuses swapped relays no difference haven't checked voltages yet
but i now know i have no fuel pressure worst case scenario fuel pump but have to check all grounds and wiring before jumping to conclusions
also swapped tps
a work in progress
will keep posting as i make findings
thank you for input
but i now know i have no fuel pressure worst case scenario fuel pump but have to check all grounds and wiring before jumping to conclusions
also swapped tps
a work in progress
will keep posting as i make findings
thank you for input
Last edited by C5 Diag; May 2, 2019 at 11:58 AM.
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,416
Likes: 3,972
From: Cape Coral, Florida
Great !!... I was a F.E. in the Air Force Reserves on a C141 for almost 20 years...thanks for subscribing !!...are you having fuel pump issues ??
Racer
Joined: Jul 2012
Posts: 266
Likes: 6
From: winnipeg manitoba
yes sir il be doing some electrical forensics 2day lol I know i have power at the fuse box because my scavenge pump kicks in for the 2 secontd prime so ill have go from there to the pump and see
Thread Starter
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
With the P-0120 & P-0220 DTCs you really need to get those sorted out before you worry about other things. If you have any throttle position circuit issues the PCM will either set reduced engine power or run like crap like you are seeing. If you hear the fuel pump prime, you most likely have a good pump and power to the pump. Open the fuel cap and have someone turn the key on. It will be much easier to hear the pump run that way.
Check the Throttle Position Sensor connector female pins, wiring to the connector, harness and the connector male pins. You can check the sensor resistance but its best to use a scope. If you have a scanner with live data capability you should be able to see phase A & B voltage and or angle. They should be 180 degs out from each other. Like 4.xx VDC & 1.xx VDC.
Bill