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3800 Engine Swap -- will not start -- HELP by pparker
Started on: 02-26-2014 04:25 PM
Replies: 10 (314 views)
Last post by: darkhorizon on 03-03-2014 06:34 PM
pparker
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Report this Post02-26-2014 04:25 PM Click Here to See the Profile for pparkerClick Here to Email pparkerSend a Private Message to pparkerEdit/Delete MessageReply w/QuoteDirect Link to This Post
I have a 2004 Grand Prix GPT. Engine, auto-trans, complete with harness, PCM, body control module, etc., installed in a Lambo kit.
When I turn the key on, cluster lights up, no warnings on display, except ABS and traction control which are not being used. When
I turn key to start, cluster goes dark, fuel pump does not run, engine does not crank.

It almost seems like trying to start in gear. Anyone know how Auto-trans neutral switch works?

OBD code reader will not make connection to PCM. I have Alldata wiring diagrams, but, boy are they complicated! Any hints where to start trouble-shooting? Don't want to haul it to a dealer.

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Gall757
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Report this Post02-26-2014 06:33 PM Click Here to See the Profile for Gall757Send a Private Message to Gall757Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by pparker:
Don't want to haul it to a dealer.


Understatement of the year.

bump for one of the 3800 electrical gurus.
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phonedawgz
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Report this Post02-26-2014 06:45 PM Click Here to See the Profile for phonedawgzClick Here to visit phonedawgz's HomePageClick Here to Email phonedawgzSend a Private Message to phonedawgzEdit/Delete MessageReply w/QuoteDirect Link to This Post
So you swapped the complete donor engine and body harness into the car?
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trotterlg
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Report this Post02-26-2014 07:20 PM Click Here to See the Profile for trotterlgClick Here to Email trotterlgSend a Private Message to trotterlgEdit/Delete MessageReply w/QuoteDirect Link to This Post
Sort of sounds like you are having a battery connection problem or ground problem. When the starter draws current the voltage drops and the lights go out. I would check that out before you do much else. Larry
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James Bond 007
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Report this Post02-26-2014 07:29 PM Click Here to See the Profile for James Bond 007Send a Private Message to James Bond 007Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by trotterlg:

Sort of sounds like you are having a battery connection problem or ground problem. When the starter draws current the voltage drops and the lights go out. I would check that out before you do much else. Larry


Good point. Ide allso check to make sure you have a good ground off the engine block. Did you have the PCM edited,so the security feature would be disabled and the car would start (you could allso have the ABS edited out too). Is the battery fulley charged?

[This message has been edited by James Bond 007 (edited 02-26-2014).]

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FIEROFLYER
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Report this Post02-27-2014 10:12 AM Click Here to See the Profile for FIEROFLYERSend a Private Message to FIEROFLYEREdit/Delete MessageReply w/QuoteDirect Link to This Post
Did you use every thing from the GP including the steering column and ignition switch, most newer cars no longer have the neutral start switch on the tranny with power to the starter going through the switch they use relays and such to control power to pretty much every thing including ignition power to most systems goes through relays. If you want to explain better how you wired your car I can most likely help you get every thing working. Dan

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DARN Cars now open with
Over 30 years wiring experience between cars and trade as an avionics technician in both Canadian Air Force and civilian aviation.
Over 25 years experience building and modifying cars.
Over 10 years of full Fiero engine swaps and harnesses building and still going.

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pparker
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Report this Post03-03-2014 03:43 PM Click Here to See the Profile for pparkerClick Here to Email pparkerSend a Private Message to pparkerEdit/Delete MessageReply w/QuoteDirect Link to This Post
3800 Engine Swap -- will not start -- HELP

Thanks for the reply Mrlogic1234. My wiring is completely stock....all plug in, except for things I'm not using. ABS, wheel sensors, etc. No new wiring at all or patched wiring. It seems I must have one critical wire disconnected somewhere. I can jump the relays and crank, get fuel, and spark; however, the fuel injectors are not pulsing. I have a second PCM with same problems. Any guess as to what it could be?
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IanT720
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Report this Post03-03-2014 04:37 PM Click Here to See the Profile for IanT720Click Here to Email IanT720Send a Private Message to IanT720Edit/Delete MessageReply w/QuoteDirect Link to This Post
Is it in gear? I freaked out when my swap didn't start for 5 mins... Till I realized I didn't know what gear the trans was in (Auto)... Mine actually won't start in Neutral, only Park. But yes, pop the shifter cable off the trans. Park should be all the way Counter Clockwise, If I remember right... Just grab it and twist.

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1987 Fiero GTX 3800 Turbo... My Build, ST3 Cam, Lowered, Wheels, and pics enjoy!http://www.fiero.nl/forum/Forum1/HTML/089483.html

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IanT720
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Report this Post03-03-2014 04:40 PM Click Here to See the Profile for IanT720Click Here to Email IanT720Send a Private Message to IanT720Edit/Delete MessageReply w/QuoteDirect Link to This Post

IanT720

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Also for what its worth... Did you put that dog bone washer back on by the C500 connector? It connects both posts.... I have no idea what it does but, I know its easy to forget. :P

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1987 Fiero GTX 3800 Turbo... My Build, ST3 Cam, Lowered, Wheels, and pics enjoy!http://www.fiero.nl/forum/Forum1/HTML/089483.html

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IanT720
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Report this Post03-03-2014 04:41 PM Click Here to See the Profile for IanT720Click Here to Email IanT720Send a Private Message to IanT720Edit/Delete MessageReply w/QuoteDirect Link to This Post

IanT720

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Just saw the part about the lights dimming... Check battery/Connections to starter..

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1987 Fiero GTX 3800 Turbo... My Build, ST3 Cam, Lowered, Wheels, and pics enjoy!http://www.fiero.nl/forum/Forum1/HTML/089483.html

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darkhorizon
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Report this Post03-03-2014 06:34 PM Click Here to See the Profile for darkhorizonSend a Private Message to darkhorizonEdit/Delete MessageReply w/QuoteDirect Link to This Post
might want to check that all your security learn stuff is done as well if you have been swapping modules around... Google up some of those learn procedures (they are basically key on for 10 minutes, key off, key on for 10 minutes repeat)
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