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LTX and LSX Putting LT1's, LS1's, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects, including repairs, swap info, and performance upgrades.

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Old 08-29-2009, 06:20 AM   #1
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Join Date: Sep 2000
Location: Crestline,OH
Posts: 388
Car: 1987 Formula 350
Engine: 6.0 and smak
Transmission: 4l80e
Axle/Gears: 9bolt 3.27

Classifieds Rating: (0)
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Neutral Safety Switch and you!

My 6.0 swap won't start.

Seem to be getting fuel. (wet plugs)

No spark.

I have power to coils and control power for packs.

Hptuners, says CKP P0335, but I put a new one in it and no change.

triple checked the wiring and plug, it "rings" out just fine and it has 12.7v at the right pin, with key on.

Have a 2002 6.0l/4l80e "411" computer and Hptuners mods just to get it started... emissions off, and vats (fuel pumps work)

tired and couldn't think anymore, so I went home and took a shower. and looked at some pin out diagrams.

I don't remember using P 34 Neutral safety switch, it is still hooked up to the car but not the PCM! is that maybe it?

if not what else may it be?
__________________
Ram Air Firebird Formula 350 1987
Powder Coated Holley Stealth,
HX50W Holset, monster SX pump,
42lb injectors, FMIC, FS BOV [[Tuning in progress]] and I still have my Nitrous back up my 10psi...
bent 3 rods..... now 6.0L/ 4l80e with Nitrous

Click sig pic for a better view of parts and that state she is in right now. www.myspace.com/rippedtornheart
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Old 08-29-2009, 09:12 AM   #2
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Join Date: Jun 2005
Location: NC
Posts: 6,038
Car: 92 Firebird
Engine: Supercharged 6.0
Transmission: 4L80E
Axle/Gears: 8.8 3.55 locker

Classifieds Rating: (19)
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Re: Neutral Safety Switch and you!

B32 and B34 are the PN pins that must be grounded to run

Some pinouts call for one or the other, some call for both. I err on the side of caution and ground them both as more grounds than necessary changes nothing. Too few... well you know
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Old 08-29-2009, 12:51 PM   #3
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Join Date: Sep 2000
Location: Crestline,OH
Posts: 388
Car: 1987 Formula 350
Engine: 6.0 and smak
Transmission: 4l80e
Axle/Gears: 9bolt 3.27

Classifieds Rating: (0)
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Re: Neutral Safety Switch and you!

sweet, working by yourself on lil problems like this takes a toll. Taking a break really helped, and so did you I will give that a whack...

still if anyone knows something else that it "could" be let me know...thanks
__________________
Ram Air Firebird Formula 350 1987
Powder Coated Holley Stealth,
HX50W Holset, monster SX pump,
42lb injectors, FMIC, FS BOV [[Tuning in progress]] and I still have my Nitrous back up my 10psi...
bent 3 rods..... now 6.0L/ 4l80e with Nitrous

Click sig pic for a better view of parts and that state she is in right now. www.myspace.com/rippedtornheart
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Old 09-01-2009, 11:18 AM   #4
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Join Date: Sep 2000
Location: Crestline,OH
Posts: 388
Car: 1987 Formula 350
Engine: 6.0 and smak
Transmission: 4l80e
Axle/Gears: 9bolt 3.27

Classifieds Rating: (0)
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Re: Neutral Safety Switch and you!

On this truck, "411" pcm 2002 diag. for a 4l80e it also calls for c1(blue)72, c2(red)62 to be grounded by the Park/ Neutral Safety Switch .


didn't fix the crank, but no start problem!!!

http://www.thirdgen.org/techboard/lt...ird-6-0-a.html (87 bird, 6.0/4l80 no start)
(added for searchers)
__________________
Ram Air Firebird Formula 350 1987
Powder Coated Holley Stealth,
HX50W Holset, monster SX pump,
42lb injectors, FMIC, FS BOV [[Tuning in progress]] and I still have my Nitrous back up my 10psi...
bent 3 rods..... now 6.0L/ 4l80e with Nitrous

Click sig pic for a better view of parts and that state she is in right now. www.myspace.com/rippedtornheart

Last edited by fun Pain; 09-01-2009 at 03:19 PM.
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Old 09-01-2009, 11:18 AM
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