4.2 swap, engine wont start

99v6stang · October 8th, 2007, 11:27 PM

Okey so after 4 days of living hell i swapped in a 99 4.2 in my 99 mustang and now it wont start. It will pop a little but will not star tat all. What could be wrong???

ESG-642T · October 8th, 2007, 11:30 PM

Originally Posted by 99v6stang

Okey so after 4 days of living hell i swapped in a 99 4.2 in my 99 mustang and now it wont start. It will pop a little but will not star tat all. What could be wrong???

fuel?

computer?

itschristorres8 · October 8th, 2007, 11:36 PM

4.2L!?!?! pictures..what kinda upgrades on it...
all cable and grounds are connected?
fuses...
plugs
sensors...
fuel lines
also comuter like SSS said is critical

99v6stang · October 8th, 2007, 11:42 PM

it is the f150 4.2, i ported and polished the heads and upper and lower intakes. I laso has a spec b cam, springs, and pushrods from morana racing

All cables, wires, everything is connected.

plugs are brand new, gapped and fully installed

Sensors are all in and fully connected

Fuel lines, rail, injectors are all connected and it smells like itss getting gas and its popping some

The computer is from the stock 3.8 tunned by a sniper special forces tunner but tuned for 3.8 still.... Could this be the problem?

ESG-642T · October 8th, 2007, 11:43 PM

Originally Posted by 99v6stang

it is the f150 4.2, i ported and polished the heads and upper and lower intakes. I laso has a spec b cam, springs, and pushrods from morana racing

All cables, wires, everything is connected.

plugs are brand new, gapped and fully installed

Sensors are all in and fully connected

Fuel lines, rail, injectors are all connected and it smells like itss getting gas and its popping some

The computer is from the stock 3.8 tunned by a sniper special forces tunner but tuned for 3.8 still.... Could this be the problem?

That junk could be the problem, but I don't know. Got aim?

itschristorres8 · October 8th, 2007, 11:45 PM

could be but not critical enough to not let your car start i believe..just not run at it best...but imnot to sure if the computer might not be able to correspond with the new block or wat..still i dont think thats it..
and check engine light?

99v6stang · October 8th, 2007, 11:53 PM

I never paid any attention to the check engine light, but isnt that always on when the car is starting? And i doubt running the 3.8 computer could cause this problem, or that the sniper tunning would effect it this much but then again i also thought the car would start today.

99v6stang · October 8th, 2007, 11:54 PM

I was thinking this was a timming issue or possibly even something to do with using the 3.8 coil pack

99v6stang · October 8th, 2007, 11:55 PM

Also i pust the cam position sensor in at tdc but it was taken out of my 3.8 not at tdc, could this be an issue?

Onemanzu · October 9th, 2007, 12:26 AM

Originally Posted by 99v6stang

Also i pust the cam position sensor in at tdc but it was taken out of my 3.8 not at tdc, could this be an issue?

you need to reset your Cam shaft and crank shaft positioning sensors... reseting both of these and making sure that they are timed right will help you get it started...

is the popping like a back fire pop? cause if so its timing... due to CMS and CPS

dapack69 · October 9th, 2007, 05:52 AM

When you installed the snychro, did you use the tool to make sure its installed in the right position?

Check your plug wires, make sure that you have them in the right order.

99v6stang · October 9th, 2007, 07:28 AM

i was not aware that there was a special tool. How do i reset these sensors?

dapack69 · October 9th, 2007, 07:32 AM

Reset what sensors?

mmvi · October 9th, 2007, 07:42 AM

make sure the timing is correct.. (cps, and whatnot) also, my screamin demon coil pack f'd me in the a a few times, the wires are no where near what the y should be as far as the books say, they're all over the place. also, popping as in backfiring? not starting at all? turning over atleast? my next thought is vacuum leak... i had one and the car hardly turned over. just my thoughts though.

99v6stang · October 9th, 2007, 08:19 AM

The timming is correct except i dont know about the cam position senor. Like i said before it was taken out of an engine not at tdc and put in at tdc, I do not know what must be done to correct time the cam position sensor. And the poping was if it was trying to start, but it did not start at all. I have triple checked all the vaccum lines so i highly doubt that could be the problem/

dapack69 · October 9th, 2007, 08:32 AM

How do you have the plug wires done. And you really need to get hold of the cam sync tool. You can usually buy them for about $30.

mmvi · October 9th, 2007, 08:45 AM

too bad you dont live near me, i could pass one on to you for nothing. take carb and choke crap and spray around all your gaskets (to make sure) my car did the same thing when it had a vac leak... i thought the ssms heads and intakes were good, but i had to have them shaved because they were off a bit... then i was told, remove those damn medal spacers in the gaskets, they held the lower intake away from the heads.... no more spacres and the car runs perfectly!

mmvi · October 9th, 2007, 08:46 AM

i dont know if anyone else had a problem with the gasket spacers, but they cost me 500 bucks or more till we figured out what it was....

dapack69 · October 9th, 2007, 08:56 AM

What are gasket spacers?

ESG-642T · October 9th, 2007, 08:58 AM

Originally Posted by dapack69

What are gasket spacers?

intake spacer?

October 8th, 2007, 11:27 PM	#1
99v6stang Enthusiast Join Date: Dec 2006 Posts: 760 iTrader: 0 reviews	4.2 swap, engine wont start Okey so after 4 days of living hell i swapped in a 99 4.2 in my 99 mustang and now it wont start. It will pop a little but will not star tat all. What could be wrong???

October 8th, 2007, 11:36 PM	#3
itschristorres8 Banned 00 V6 & 09 GT 13.37@104.4mph--BONE stock GT Join Date: Aug 2006 Location: south florida Posts: 15,806 iTrader: 2 reviews	4.2L!?!?! pictures..what kinda upgrades on it... all cable and grounds are connected? fuses... plugs sensors... fuel lines also comuter like SSS said is critical __________________ [SIGPIC][/SIGPIC] Acmillr loves me

October 8th, 2007, 11:42 PM	#4
99v6stang Enthusiast Join Date: Dec 2006 Posts: 760 iTrader: 0 reviews	it is the f150 4.2, i ported and polished the heads and upper and lower intakes. I laso has a spec b cam, springs, and pushrods from morana racing All cables, wires, everything is connected. plugs are brand new, gapped and fully installed Sensors are all in and fully connected Fuel lines, rail, injectors are all connected and it smells like itss getting gas and its popping some The computer is from the stock 3.8 tunned by a sniper special forces tunner but tuned for 3.8 still.... Could this be the problem? __________________ My car ---- (m112 in progress)

October 8th, 2007, 11:45 PM	#6
itschristorres8 Banned 00 V6 & 09 GT 13.37@104.4mph--BONE stock GT Join Date: Aug 2006 Location: south florida Posts: 15,806 iTrader: 2 reviews	could be but not critical enough to not let your car start i believe..just not run at it best...but imnot to sure if the computer might not be able to correspond with the new block or wat..still i dont think thats it.. and check engine light? __________________ [SIGPIC][/SIGPIC] Acmillr loves me

October 8th, 2007, 11:53 PM	#7
99v6stang Enthusiast Join Date: Dec 2006 Posts: 760 iTrader: 0 reviews	I never paid any attention to the check engine light, but isnt that always on when the car is starting? And i doubt running the 3.8 computer could cause this problem, or that the sniper tunning would effect it this much but then again i also thought the car would start today. __________________ My car ---- (m112 in progress)

October 8th, 2007, 11:54 PM	#8
99v6stang Enthusiast Join Date: Dec 2006 Posts: 760 iTrader: 0 reviews	I was thinking this was a timming issue or possibly even something to do with using the 3.8 coil pack __________________ My car ---- (m112 in progress)

October 8th, 2007, 11:55 PM	#9
99v6stang Enthusiast Join Date: Dec 2006 Posts: 760 iTrader: 0 reviews	Also i pust the cam position sensor in at tdc but it was taken out of my 3.8 not at tdc, could this be an issue? __________________ My car ---- (m112 in progress)

October 9th, 2007, 05:52 AM	#11
dapack69 Enthusiast Join Date: Nov 2006 Location: Ft Walton Bch, FL Posts: 503 iTrader: 0 reviews	When you installed the snychro, did you use the tool to make sure its installed in the right position? Check your plug wires, make sure that you have them in the right order. __________________ Custom engine built from Super Six, Cam from Delk performance, Custom Novi 2000 in the works. My Car www.supersixmotorsports.com www.bc-automotive.com/

October 9th, 2007, 07:28 AM	#12
99v6stang Enthusiast Join Date: Dec 2006 Posts: 760 iTrader: 0 reviews	i was not aware that there was a special tool. How do i reset these sensors? __________________ My car ---- (m112 in progress)

October 9th, 2007, 07:32 AM	#13
dapack69 Enthusiast Join Date: Nov 2006 Location: Ft Walton Bch, FL Posts: 503 iTrader: 0 reviews	Reset what sensors? __________________ Custom engine built from Super Six, Cam from Delk performance, Custom Novi 2000 in the works. My Car www.supersixmotorsports.com www.bc-automotive.com/

October 9th, 2007, 07:42 AM	#14
mmvi Enthusiast Join Date: Jan 2007 Posts: 788 iTrader: 0 reviews	make sure the timing is correct.. (cps, and whatnot) also, my screamin demon coil pack f'd me in the a a few times, the wires are no where near what the y should be as far as the books say, they're all over the place. also, popping as in backfiring? not starting at all? turning over atleast? my next thought is vacuum leak... i had one and the car hardly turned over. just my thoughts though.

October 9th, 2007, 08:19 AM	#15
99v6stang Enthusiast Join Date: Dec 2006 Posts: 760 iTrader: 0 reviews	The timming is correct except i dont know about the cam position senor. Like i said before it was taken out of an engine not at tdc and put in at tdc, I do not know what must be done to correct time the cam position sensor. And the poping was if it was trying to start, but it did not start at all. I have triple checked all the vaccum lines so i highly doubt that could be the problem/ __________________ My car ---- (m112 in progress)

October 9th, 2007, 08:32 AM	#16
dapack69 Enthusiast Join Date: Nov 2006 Location: Ft Walton Bch, FL Posts: 503 iTrader: 0 reviews	How do you have the plug wires done. And you really need to get hold of the cam sync tool. You can usually buy them for about $30. __________________ Custom engine built from Super Six, Cam from Delk performance, Custom Novi 2000 in the works. My Car www.supersixmotorsports.com www.bc-automotive.com/

October 9th, 2007, 08:45 AM	#17
mmvi Enthusiast Join Date: Jan 2007 Posts: 788 iTrader: 0 reviews	too bad you dont live near me, i could pass one on to you for nothing. take carb and choke crap and spray around all your gaskets (to make sure) my car did the same thing when it had a vac leak... i thought the ssms heads and intakes were good, but i had to have them shaved because they were off a bit... then i was told, remove those damn medal spacers in the gaskets, they held the lower intake away from the heads.... no more spacres and the car runs perfectly!

October 9th, 2007, 08:46 AM	#18
mmvi Enthusiast Join Date: Jan 2007 Posts: 788 iTrader: 0 reviews	i dont know if anyone else had a problem with the gasket spacers, but they cost me 500 bucks or more till we figured out what it was....

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October 9th, 2007, 08:56 AM	#19
dapack69 Enthusiast Join Date: Nov 2006 Location: Ft Walton Bch, FL Posts: 503 iTrader: 0 reviews	What are gasket spacers? __________________ Custom engine built from Super Six, Cam from Delk performance, Custom Novi 2000 in the works. My Car www.supersixmotorsports.com www.bc-automotive.com/

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4.2 swap, engine wont start

4.2 swap, engine wont start

Re: 4.2 swap, engine wont start