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04 Z0-4 will not start ( HELP )

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Old Feb 5, 2015 | 04:50 PM
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Default 04 Z0-4 will not start ( HELP )

Was runnign great ,untill I installed Holly valve covers and all new injector seals ..Spins like a top nothing ,,checked all the plugs, pluged back in the right place ,checked spark plugs no wet gas ... Can smell gas when trying to start ,no leaks just a smell ..??? thanks ...
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Old Feb 5, 2015 | 04:57 PM
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Originally Posted by radar502
was runnign great ,untill i installed holly valve covers and all new injector seals ..spins like a top nothing ,,checked all the plugs, pluged back in the right place ,checked spark plugs no wet gas ... Can smell gas when trying to start ,no leaks just a smell ..??? Thanks ...
oops ( 6)
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Old Feb 5, 2015 | 06:08 PM
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what did you knock loose?
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Old Feb 6, 2015 | 08:22 AM
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Originally Posted by racebum
what did you knock loose?
I have looked don't see anything .. I remover Batt. to recharge I think that may reset the PCM Ect. Will try in the morning to restart .Unpluging stuff on these makes them go crazzy some times ..
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Old Feb 6, 2015 | 10:55 AM
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Try pulling the codes if you can't get it to run and we can go from there.
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Old Feb 6, 2015 | 11:00 AM
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Originally Posted by dadaroo
Try pulling the codes if you can't get it to run and we can go from there.
NO new codes some H ones ??? It did run through and NO codes ..
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Old Feb 6, 2015 | 11:16 AM
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Plug the coils back in after the valve covers?
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Old Feb 6, 2015 | 11:40 AM
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Originally Posted by 3boystoys
Plug the coils back in after the valve covers?
Just rechecked all the plugs did not find one hanging around all pluged somewere ,checked 50% fuses all looked good , Looked it over did see anything hanging the 04 has 60,000 runs very good drove in to grage installed valve covers seals pluged all back in ..NO START
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Old Feb 6, 2015 | 01:32 PM
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Check spark and fuel pressure.
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Old Feb 7, 2015 | 11:06 AM
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Originally Posted by 3boystoys
Check spark and fuel pressure.
NO SPARK , checking in to that deal now ,everthing else working . getting a layout of the Sys. to start from the crank to see what the heck is going on ...
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Old Feb 7, 2015 | 01:53 PM
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Check Ground 106 where battery negative pole attaches to frame: Ignition Relay, Powertrain control modules, throttle actuator control module, mass airflow sensor.

Check Ground 107, left rear head: Ignition control modules 1-8.

Unlikely, but last check Ground 202 and splice pack 202, bottom of RT A pillar (grab plastic sill cover and pull up and out, G 202 and SP 202 are in the lower corner) This group of grounds includes the ignition switch.

Under hood fuse box: your owner's manual gives a description of what each does. Check fuses 16, 23, pcm; 19, engine ignition; relay 42, ignition.

54 is supposed to be a fuse puller.

Right footwell fuse panel: Check 13, 23, 47, 50 these have an ignition function.

I probably missed some, check your OM.

Last edited by jim993; Feb 7, 2015 at 01:56 PM. Reason: Ground 202 is at botttom of RT A pillar.
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Old Feb 7, 2015 | 05:51 PM
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Since you had the valve cover off I bet you accidently broke the ground on the back of the driver's side head. I had a no start problem one time and that was it. A second problem is the ground that is in the side of the block below the manifolds/headers. That is not as likely but mine worked its way loose at one time and was giving me all kinds of trouble till I found a thread on here and I checked it.
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Old Feb 8, 2015 | 01:35 AM
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Originally Posted by silver408z
Since you had the valve cover off I bet you accidently broke the ground on the back of the driver's side head. I had a no start problem one time and that was it. A second problem is the ground that is in the side of the block below the manifolds/headers. That is not as likely but mine worked its way loose at one time and was giving me all kinds of trouble till I found a thread on here and I checked it.
FIXED: Was ground on back on drivers side head 2 wires both brocken .I had to take intake off to get back there looked like I needed gaskets anway ,had to strip the harness to find it and two grounds broken don't know how ??? found some more stuff needed fixed so fixed them also some wires on headers ..I guess we all need to just take a good look under and in tight places to make sure all is good these C-5 are getting old and grounds and such need to be cleaned I cleaned mine checked all some wires had came lose and had to be zip tied back in place ..Well got new valve covers gaskets intake gasket and all the wires and grounds looked at all cleaned up ..One little wire BAM I'll Be looking at the wires way closer that before this for sure ..Thanks for all the help ..I think it runs better go figure ... THANKS>>>
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