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03 neon no fire to coil


 
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jigolf
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Post: #1   PostPosted: Thu Jan 27, 2011 6:36 am    Post subject: 03 neon no fire to coil Reply with quote

We put an 04 engine 2.0 in 03 which threw rod and have not got it started yet. We have checked cam and crank sensor , tried new computer, fuses , battery good , getting fuel will turn engine over good but no fire to coil., also tried another coil. no hot wire to coil with key on. What els can we do? Is there something different in the wire harness on 04 engine than 03?
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occasional demons
Mr One World
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2001 Dodge Neon ES

Post: #2   PostPosted: Thu Jan 27, 2011 6:51 am    Post subject: Reply with quote

It cranks fine, but just doesn't fire the coil? (As in you didn't also originally swap PCM's?) The PCM needs to have the VIN/SKIM flashed at the dealer. It will lock down otherwise. Try the original PCM again. If it did not see the proper signal from the key transponder, it would not have started.

Just putting in another PCM will not work. The ASD relay is prolly not energizing, keeping the coil and injectors from getting power. Jumping power to them may not work either if the PCM has locked down. It will not let the drivers ground the coil/injectors either.

To reset the original PCM, you need to hook a battery charger to the car, and let it sit with the key on for a while. I can't recall ATM how long, but I think it is for more than a few hours. Hope that works for you.
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jigolf
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Post: #3   PostPosted: Sun Jan 30, 2011 8:24 pm    Post subject: Reply with quote

we tried reset no luck yet?
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lilnicko11
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2002 Dodge Neon ACR

Post: #4   PostPosted: Mon Jan 31, 2011 10:47 am    Post subject: Reply with quote

If you have a Dodge dealer close by. try calling them or maybe even towing it there after asking them.
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occasional demons
Mr One World
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2001 Dodge Neon ES

Post: #5   PostPosted: Mon Jan 31, 2011 12:27 pm    Post subject: Reply with quote

Get them to tow it no charge, if you have them repair it. Laughing
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dblsg wrote:
ya'll a bunch of post whores

desmodromic wrote:
You have to remember what's important here, while they make New humans everyday, they'll never make another Neon.



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occasional demons
Mr One World
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2001 Dodge Neon ES

Post: #6   PostPosted: Mon Jan 31, 2011 7:04 pm    Post subject: Re: 03 neon no fire to coil Reply with quote

jigolf wrote:
Is there something different in the wire harness on 04 engine than 03?


Did you swap the engine harness also, or did you just swap the engine? IDK if the harness is any different. I would have stuck with the '03 everything, and just put the engine in. At least you knew the '03 stuff did run the engine before it failed.

Center wire on the coil is 12 volts to ground. The two outer wires only switch ground when the PCM wants to energize/fire the coils. Not sure how you were checking the power to the coil.
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Bill


dblsg wrote:
ya'll a bunch of post whores

desmodromic wrote:
You have to remember what's important here, while they make New humans everyday, they'll never make another Neon.



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Danteneon
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2002 Dodge Neon ACR

Post: #7   PostPosted: Tue Feb 01, 2011 6:09 am    Post subject: Reply with quote

Could this be the classic "mixed up the coil connector and the CPS connector"?

Just in case, the connector for the coil is the longer one with the plastic sheathing around it.
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Mr One World
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2001 Dodge Neon ES

Post: #8   PostPosted: Tue Feb 01, 2011 6:11 am    Post subject: Reply with quote

You are the man, Dante! I totally forgot about that. slap
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Bill


dblsg wrote:
ya'll a bunch of post whores

desmodromic wrote:
You have to remember what's important here, while they make New humans everyday, they'll never make another Neon.



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Danteneon
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Post: #9   PostPosted: Tue Feb 01, 2011 6:13 am    Post subject: Reply with quote

ROFL

I have seen this happen (to myself even Shocked ) too many times to forget it Laughing
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esteinmaier
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2004 Dodge Neon SE

Post: #10   PostPosted: Tue Feb 01, 2011 6:28 am    Post subject: Reply with quote

Good call. If the injectors are hot, so is the coil.
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Mr One World
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2001 Dodge Neon ES

Post: #11   PostPosted: Tue Feb 01, 2011 6:34 am    Post subject: Reply with quote

There should be 12 volts at the coil plug, and 5 volts at the CPS plug. One way to tell them apart. If they are powered.
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Bill


dblsg wrote:
ya'll a bunch of post whores

desmodromic wrote:
You have to remember what's important here, while they make New humans everyday, they'll never make another Neon.



2001 Neon ES MTX with '02 R/T PCM
Help support 2GN!
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Danteneon
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Post: #12   PostPosted: Wed Feb 02, 2011 6:38 am    Post subject: Reply with quote

So, is she fixed?
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jigolf
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Post: #13   PostPosted: Wed Feb 02, 2011 8:20 am    Post subject: 03 neon no fire to coil Reply with quote

Not yet we swapped to the origional car harness and still nothing ? The only thing we haven't checked or changed is the map senso. i have heard this coould cause problem. Havent been to dealer yet . any input is still appreciated. thanks
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Mr One World
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2001 Dodge Neon ES

Post: #14   PostPosted: Wed Feb 02, 2011 9:09 am    Post subject: Reply with quote

A bad MAP sensor won't keep it from running/starting. It just wouldn't run well.
_________________
Bill


dblsg wrote:
ya'll a bunch of post whores

desmodromic wrote:
You have to remember what's important here, while they make New humans everyday, they'll never make another Neon.



2001 Neon ES MTX with '02 R/T PCM
Help support 2GN!
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jigolf
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Age: 54
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Location: Murray



Post: #15   PostPosted: Wed Mar 02, 2011 2:02 pm    Post subject: 03 neon no fire to coil Reply with quote

Well we finally got it fixed. we got a new computer, had it flshed and programed to vin and we are up again . Our engine seems to be a good strong engine. a few small issues and we will be good as new. Thanks to all of you who posted coments. I feel like my son and me are now neon mechanics. : Rock ON
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00Neon RCR
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Post: #16   PostPosted: Wed Mar 02, 2011 2:16 pm    Post subject: Re: 03 neon no fire to coil Reply with quote

jigolf wrote:
Well we finally got it fixed. we got a new computer, had it flshed and programed to vin and we are up again . Our engine seems to be a good strong engine. a few small issues and we will be good as new. Thanks to all of you who posted coments. I feel like my son and me are now neon mechanics. : Rock ON


lmao bill and dante suggested getting it flashed in the first place!
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jigolf
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Post: #17   PostPosted: Wed Mar 02, 2011 2:20 pm    Post subject: 03 neon no fire to coil Reply with quote

The computer on car was bad. we tried to do it first and had to get the new one.
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00Neon RCR
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Post: #18   PostPosted: Wed Mar 02, 2011 2:24 pm    Post subject: Re: 03 neon no fire to coil Reply with quote

jigolf wrote:
The computer on car was bad. we tried to do it first and had to get the new one.


Well that sucks, spun a rod bearing and the computer took a s*** all at once?
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