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Re: 5.7 hemi swap won't start?
[Re: 69rrconvert]
#1137258
12/16/11 09:14 PM
12/16/11 09:14 PM
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Joined: Jan 2003
Posts: 8,478
Candler,NC / Myrtle Beach, SC
JDMopar
master
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master
Joined: Jan 2003
Posts: 8,478
Candler,NC / Myrtle Beach, SC
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Quote:
I had the same issue with my 5.7 swap. It turned out to be the fuel injectors were gummed up from sitting. My 5.7 came out of a salvage yard and had sat for awhile before I tried to get it running. I pulled the injectors and placed them in a bowl filled with paint reducer and let it sit overnite. The next morning the reducer was brown in color. Reinstalled the injectors and fired right up
 I'll remember that! I've got a 2006 5.7 Hemi with 6000 miles on it, that's been sitting since 2006. I roll it over with a breaker bar, but it will be a year or 2 before it runs again in my 70 Duster. Original poster...please let us know what you find that's keeping it from running if this isn't it. 
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Re: 5.7 hemi swap won't start?
[Re: 69rrconvert]
#1137259
12/16/11 10:42 PM
12/16/11 10:42 PM
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Joined: Jan 2008
Posts: 71
Memphis, MO
xpsyclonex2002
OP
member
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OP
member
Joined: Jan 2008
Posts: 71
Memphis, MO
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Quote:
I had the same issue with my 5.7 swap. It turned out to be the fuel injectors were gummed up from sitting. My 5.7 came out of a salvage yard and had sat for awhile before I tried to get it running. I pulled the injectors and placed them in a bowl filled with paint reducer and let it sit overnite. The next morning the reducer was brown in color. Reinstalled the injectors and fired right up
Interesting. I never thought of that.
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Re: 5.7 hemi swap won't start?
[Re: xpsyclonex2002]
#1137261
12/22/11 02:34 AM
12/22/11 02:34 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Ok. Soaked the injectors in acetone. Still no joy. Anyone else got any ideas?
Like was asked... do you have fuel pressure at the rail
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Re: 5.7 hemi swap won't start?
[Re: MR_P_BODY]
#1137262
12/22/11 02:49 AM
12/22/11 02:49 AM
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Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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As far as cleaning injectors... http://oldfuelinjection.com/?p=82Beyond that as mentioned do you have pressure in the rail... 12 volts to the injectors, pulsed ground signal. Do you have a noid light to test the signal?
"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
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Re: 5.7 hemi swap won't start?
[Re: MR_P_BODY]
#1137264
12/22/11 01:57 PM
12/22/11 01:57 PM
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Joined: Jan 2003
Posts: 104,346
Garden Grove, CA
OzHemi
Penguin-hating Ginger
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Penguin-hating Ginger
Joined: Jan 2003
Posts: 104,346
Garden Grove, CA
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Quote:
Quote:
Ok. Soaked the injectors in acetone. Still no joy. Anyone else got any ideas?
Like was asked... do you have fuel pressure at the rail
That is why I had asked...when I did my LS1 swap, I checked for fuel pressure before even trying to fire it. (I have a gauge right on the aeromotive regulator though so makes it easy)
Once you verify you have proper fuel pressure then start working your way from there with injectors getting a signal and working, etc.
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Re: 5.7 hemi swap won't start?
[Re: xpsyclonex2002]
#1137268
12/25/11 01:56 PM
12/25/11 01:56 PM
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Joined: Jan 2008
Posts: 71
Memphis, MO
xpsyclonex2002
OP
member
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OP
member
Joined: Jan 2008
Posts: 71
Memphis, MO
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Quote:
I'm running the 2005 computer that came with the motor. I'm not sure what you mean by "require you to run directly to the battery"? I am using a harness from Street and Performance that was made just for this swap.
bump
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Re: 5.7 hemi swap won't start?
[Re: xpsyclonex2002]
#1137269
12/25/11 02:11 PM
12/25/11 02:11 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
OK Guys, I have had some time to work on this. Putting a NOID test on it shows that I have no signal going to any of the injectors. I put a fuel gauge at the rail. I can't get it to run so I am only able to read it with the key turned. I can hear the fuel pump running for a second or two at most then it stops. The reading I get is at around 10PSI! I cut the wire coming of the starter relay and hard wired it directly to the battery. That gives me nearly 60 psi at the rail! I know I'm supposed to have about 55psi to run the motor. Why am I not getting it unless I come directly off the battery?
When you turn the key to the on position you get a
3 second pump run time... you only get 3 key on pump
runs then the engine has to turn over so it sees that
the engine is tuning(thinks its running)... as to
no power to the injectors... that can be multiple
things
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Re: 5.7 hemi swap won't start?
[Re: xpsyclonex2002]
#1137270
12/25/11 02:12 PM
12/25/11 02:12 PM
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Joined: Jan 2003
Posts: 104,346
Garden Grove, CA
OzHemi
Penguin-hating Ginger
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Penguin-hating Ginger
Joined: Jan 2003
Posts: 104,346
Garden Grove, CA
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The pump running just for a second and shutting off when you turn the key to on sounds normal (that is how most cars seem to be) should just prime the system them when you turn the key to start it should and then running it will run the pump as normal. If you only have 10 psi it does sound like there is an issue ?  How does your fuel pump get power normally, is it through the loom getting a trigger from the PCM ? I've never done a Hemi, but with the LSx setups and using factory PCMs you have to make sure you have them burned to remove the anti-theft stuff that turns stuff off after cranking from memory.
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Re: 5.7 hemi swap won't start?
[Re: MR_P_BODY]
#1137272
12/25/11 06:58 PM
12/25/11 06:58 PM
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Joined: Jan 2008
Posts: 71
Memphis, MO
xpsyclonex2002
OP
member
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OP
member
Joined: Jan 2008
Posts: 71
Memphis, MO
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Quote:
Quote:
OK Guys, I have had some time to work on this. Putting a NOID test on it shows that I have no signal going to any of the injectors. I put a fuel gauge at the rail. I can't get it to run so I am only able to read it with the key turned. I can hear the fuel pump running for a second or two at most then it stops. The reading I get is at around 10PSI! I cut the wire coming of the starter relay and hard wired it directly to the battery. That gives me nearly 60 psi at the rail! I know I'm supposed to have about 55psi to run the motor. Why am I not getting it unless I come directly off the battery?
When you turn the key to the on position you get a
3 second pump run time... you only get 3 key on pump
runs then the engine has to turn over so it sees that
the engine is tuning(thinks its running)... as to
no power to the injectors... that can be multiple
things
Can you guys give me a quick rundown of the most common causes of the injectors not getting power and how to test for them? I am no mechanic, just a guy who is crazy enough to tackle a project like this with no help except the forums. 
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