RetiredButNot 06GP
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- Joined
- Apr 23, 2021
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Hello, I will try to be thorough but its a weird no start.
I have a 2006 Grand Prix base, rust free car.
I recently rebuilt the car, not wrecked, but it was all stock & bad.
I rebuilt the motor, replaced the fuel system from pump to injectors, the whole 9 yards down to the tires.
Everything was replaced.
I drove the car around, gave it a bath, drove it some more.
Got home, shut it off, fired it back up, no problem.
Waited 30 mins, fired right back up.
Came out the next morning and I heard a Clunk.
Dang, motor locked up.
Nope, spins fine.
After days of messing with it, here is where I stand.... Aaaaaaagghhh
Lol
All Neg & Pos posts, cables, nuts, bolts, mounting points have been sanded clean.
No fuses are blown.
Swapped relays around.
Pulled starter, it was gummed up.
Disassembled starter, cleaned & bench tested. Works fine.
But Not in the car.
Tried starter #2.
Bench tested fine, Clunked in the car also.
Ran wires from starter #1 mounted in the car to starter #2 outside the car, both acted the same & clunked at the same time.
Barely kicks out, no spin and slams back in.
Tested Batt+ to engine ground ~ 12.59v
Batt+ to Batt- was 12.60v
Starter+ to engine -- it was 12.59v
Tested purple Sol+ wire in crank position and test light lit up.
Heres the weird part.
Through all of this, my gauges do not swing.
Fuel gauge works, all lights work.
With the starter in the car wired up, turn the key, CLUNK, Total Power Loss for a split second, everything resets.
Remove the starter, turn the key to crank, No power loss, gauges swing, things are back to normal.
I replaced the solenoid, that did not work.
Im thinking PCM/ECM but after dropping 2500 on this car.....but then again, its like the last part left to replace.
Oh yeah, I bought a new ignition switch too.
So basically, the car works properly until you install the starter.
Gauges & info center flutter, reset, total power loss with the starter in, in crank position.
Everything is new.
No blown fuses or relays.
Power where power should be, at the proper volts.
Clean grounds.
Starters work.
Help.
TIA~✌
I have a 2006 Grand Prix base, rust free car.
I recently rebuilt the car, not wrecked, but it was all stock & bad.
I rebuilt the motor, replaced the fuel system from pump to injectors, the whole 9 yards down to the tires.
Everything was replaced.
I drove the car around, gave it a bath, drove it some more.
Got home, shut it off, fired it back up, no problem.
Waited 30 mins, fired right back up.
Came out the next morning and I heard a Clunk.
Dang, motor locked up.
Nope, spins fine.
After days of messing with it, here is where I stand.... Aaaaaaagghhh
Lol
All Neg & Pos posts, cables, nuts, bolts, mounting points have been sanded clean.
No fuses are blown.
Swapped relays around.
Pulled starter, it was gummed up.
Disassembled starter, cleaned & bench tested. Works fine.
But Not in the car.
Tried starter #2.
Bench tested fine, Clunked in the car also.
Ran wires from starter #1 mounted in the car to starter #2 outside the car, both acted the same & clunked at the same time.
Barely kicks out, no spin and slams back in.
Tested Batt+ to engine ground ~ 12.59v
Batt+ to Batt- was 12.60v
Starter+ to engine -- it was 12.59v
Tested purple Sol+ wire in crank position and test light lit up.
Heres the weird part.
Through all of this, my gauges do not swing.
Fuel gauge works, all lights work.
With the starter in the car wired up, turn the key, CLUNK, Total Power Loss for a split second, everything resets.
Remove the starter, turn the key to crank, No power loss, gauges swing, things are back to normal.
I replaced the solenoid, that did not work.
Im thinking PCM/ECM but after dropping 2500 on this car.....but then again, its like the last part left to replace.
Oh yeah, I bought a new ignition switch too.
So basically, the car works properly until you install the starter.
Gauges & info center flutter, reset, total power loss with the starter in, in crank position.
Everything is new.
No blown fuses or relays.
Power where power should be, at the proper volts.
Clean grounds.
Starters work.
Help.
TIA~✌
