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Thread: wont start!!!!!!!!!!!!!!!!!!!!!!
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09-17-2010, 01:46 AM #1
wont start!!!!!!!!!!!!!!!!!!!!!!
I got a 2001 z28 6 speed just did some work on my heads stock 241s ls6 intake and i have a 6.0 block of a 02 2500 silverado the motor only had 25000 miles before they wrecked it but
now the engine wont start and i already check and double and triple check every thing and still wont start i even bought a new computer but still wont start the only code it gives out is p0405 you know the egr shit but it should start right
any help i don't know what to do
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09-17-2010, 10:19 AM #2
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09-17-2010, 10:27 AM #3
- Join Date
- Jul 2009
- Location
- North of the Motorcity
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- 2,612
Custom Swirly Black- 2001 WS6 M6
I think some more details are needed.
I am not familiar with problems when modded like yours, but...
Is it cranking? Just not turning over? Got spark? Good relays? Good fuel pressure?
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09-17-2010, 11:50 AM #4
its cranking and its got good spark and good fuel pressure every thing seems like perfect for it to turn on but its not turning on
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09-17-2010, 12:03 PM #5
Crank sensor didn't poop on ya maybe?
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09-17-2010, 12:37 PM #6
yes it did and now it has new one and its not coming up anymore
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09-17-2010, 06:08 PM #7
- Join Date
- Apr 2008
- Location
- Madison, WI
- Posts
- 7,006
1999 Formula WS6 M6-sold- 2001 Silverado Z71
Did this 6.0 run in your car before or did you just swap it in and now it won't start? Did you forget the ground wire on the back of the driverside(? I think) head?
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09-18-2010, 10:55 PM #8
no i didnt forget that one lol but yea the motor run for one day
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09-19-2010, 08:49 AM #9
Are you getting any error codes?
2000 Pontiac Firehawk #0041 of 742
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09-19-2010, 10:07 AM #10
Pulla plug and see if you gas on it. If you are getting gas and spark it should at least try to start.
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09-20-2010, 10:52 AM #11
hmmm I would check those wires to that sensor they can easily pull out of the clip or short being so close to the motor and starter. I've been guilty of pulling them off on accident. IF it ran before i'm sure its just some electrical problem. Unless fuel pump went out. Unplug the fuel line from the rails and put a rag on the end of the line that comes from the pump turn the key it should shoot fuel into the rag.
If the motor has spark compression and fuel it will run. Start by checking those 3 things. If it has no spark the computer may be mad at you or something thats keeping it from sending a spark signal, like a bad crank sensor, but you have a new one. I would check those 3 things for sure.
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09-21-2010, 01:28 AM #12
yea it does try to start but it don't it turn and everything and i got spark coming out the coils and yes i got gas coming out,
im getting another computer in a couple hours and im trying it again and then i guess im going to pull everything apart again
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09-21-2010, 01:29 AM #13
oh yea the code im getting is p0405
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09-21-2010, 05:12 AM #14
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09-21-2010, 03:31 PM #15
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09-21-2010, 04:42 PM #16
yeap thats the code you get when you delete the egr but i have an 01 so i have no egr so naturally im going to get the code if im using a 2000 ecu, but thats easily fix with a tune..
now i just check and i have no spark and the mechanic said as long as i can get spark my car should turn on easily cos gas is good and he check the compression again and its good im just not getting any spark on the coils but their good so im thinking it might be my computer maybe this one dont work or i have no idea what else could cause this
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09-21-2010, 05:09 PM #17
- Join Date
- Apr 2008
- Location
- Madison, WI
- Posts
- 7,006
1999 Formula WS6 M6-sold- 2001 Silverado Z71
you could check for power on the pink wires and ground on the black wires for the coils. If that stuff checks out then you might still have a crank sensor problem. Maybe something with the wiring or connector.
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09-21-2010, 05:13 PM #18
ok i will check those wire 2morrow cos im at work right now and i go in 2morrow at 9 to 5 so i will do it 2morow night i hope i can get it turn on
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09-24-2010, 08:45 AM #19
so can all my coil packs go out at the same time
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09-24-2010, 09:13 AM #20
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