4v Swap People Look

03GT_Hybrid · January 22nd, 2008, 04:21 PM

Has anyone done a 4v swap and not tuned the car and kept the stock ECU of the GT. I have been having problems at the top of my 4th gear and I dont know what it is and it is driving me crazy. Thanks

ChrisJ · January 22nd, 2008, 08:39 PM

You need a tune bro...

Before you have to put a new engine in there...

Whats it doing in 4th?

You can get a chip and have the tune burned on there and use your GT PCM...

GTsetGO · January 22nd, 2008, 09:11 PM

Originally Posted by ChrisJ

You need a tune bro...

Before you have to put a new engine in there...

Whats it doing in 4th?

You can get a chip and have the tune burned on there and use your GT PCM...

+1 what exactly is it doing?

03GT_Hybrid · January 22nd, 2008, 09:49 PM

For lack of a better choice of words it "crapped out on me" I was doing a pull on the highway and twice in 4th the motor sputtered at like 4000 RPM or so and it felt like I let off but I didn't. It was wierd so I am thinking about getting the SCT Pro Racer Package and a wideband and tuning it but I want to see if there are any mechanical problems. I checked that none of the wires are melted cause I dont want an electrical fire. And a while ago it was like doing the same thing in the exact same place in the RPM range in 4th but it was never so bad that the engine gave up. If you have any info please help. I need to get back out there and go fast!

ChrisJ · January 22nd, 2008, 09:54 PM

You need to get a tune before you blow that engine sky high...

Im serious...

$10 says it is lean as a mofo...

03GT_Hybrid · January 22nd, 2008, 11:09 PM

Yea I am going to take it easy for a while. I have a cobra pump and 24 lb. injectors. If anything I think I may be a little rich but idk. I want to get a wideband before anything. Any suggestions? I was looking at autometer.

StangAddiction · January 23rd, 2008, 06:00 PM

Originally Posted by ChrisJ

You need to get a tune before you blow that engine sky high...

Im serious...

$10 says it is lean as a mofo...

+1...i'll put down $50 on the table.. Its's not about the pump and the injectors...The computr's not telling it to inject enough fuel because it's on the GT's tune. The GT's tune is designed for heads and an intake that flow significantly less, therefore, it would require less fuel...The computer doesn't automatically know that the engine's pullin more air. The MAF sensor can compensate some, but only so much. I wouldn't rely on that.

06RedfireGT · January 23rd, 2008, 08:15 PM

+1 That motor isn't going to last long with out a tune.

03GT_Hybrid · January 23rd, 2008, 10:05 PM

Ok, I am also throwing codes for no air intake temp sensor. Is this a problem cause I could se ehow that would affect the spark. I am going to get the SCT Pro Racer Package as soon as I can but I am working 2 jobs and still am not getting money fast enough! lol

ChrisJ · January 23rd, 2008, 10:07 PM

Yes you need to get an IAT in there...

IAT - Intake Air Temp

It tells the PCM when to pull timing and such because of the temp of the intake charge...

03GT_Hybrid · January 24th, 2008, 07:35 AM

Originally Posted by ChrisJ

Yes you need to get an IAT in there...

IAT - Intake Air Temp

It tells the PCM when to pull timing and such because of the temp of the intake charge...

How do I get one in there?

99cobradroptop · January 29th, 2008, 11:22 AM

I'll bet $100 its running leaner than S**t, think about it, you went fron 2v to 4v, you need more fuel for the added valves and since your comp. is still running like a 2v. its starving the motor at high rpms. Just my opinion

FSTMRFR · January 30th, 2008, 01:55 PM

subscribing...

ChrisJ · January 30th, 2008, 08:25 PM

Originally Posted by 03GT_Hybrid

How do I get one in there?

Take the two gray wires that were on the MAF and wire them to a Lightning IAT sensor and drill a hole in the intake for it to go in then put it in there and get an effin tune for gods sake

1BADSTANG · January 31st, 2008, 12:34 AM

subscribed. Dude.. shits lean

SSStang · January 31st, 2008, 03:32 AM

Please don't drive that car anymore man... Or your gonna be looking at parts on the ground.

January 22nd, 2008, 04:21 PM	#1
03GT_Hybrid Regular 2003 GT/ 4v Swap Join Date: Oct 2007 Location: Mahwah, NJ Posts: 107	4v Swap People Look Has anyone done a 4v swap and not tuned the car and kept the stock ECU of the GT. I have been having problems at the top of my 4th gear and I dont know what it is and it is driving me crazy. Thanks __________________ 2003 GT 1999 4v swap Full Bolt ons

January 22nd, 2008, 08:39 PM	#2
ChrisJ MuchCoolerThanGTsetGO 2002 Mustang GT SLOW Join Date: Jun 2006 Location: Shepherdsville, Kentucky Posts: 16,281	You need a tune bro... Before you have to put a new engine in there... Whats it doing in 4th? You can get a chip and have the tune burned on there and use your GT PCM... __________________ My Junk www.myspace.com/cjobe

January 22nd, 2008, 09:49 PM	#4
03GT_Hybrid Regular 2003 GT/ 4v Swap Join Date: Oct 2007 Location: Mahwah, NJ Posts: 107	For lack of a better choice of words it "crapped out on me" I was doing a pull on the highway and twice in 4th the motor sputtered at like 4000 RPM or so and it felt like I let off but I didn't. It was wierd so I am thinking about getting the SCT Pro Racer Package and a wideband and tuning it but I want to see if there are any mechanical problems. I checked that none of the wires are melted cause I dont want an electrical fire. And a while ago it was like doing the same thing in the exact same place in the RPM range in 4th but it was never so bad that the engine gave up. If you have any info please help. I need to get back out there and go fast! __________________ 2003 GT 1999 4v swap Full Bolt ons

January 22nd, 2008, 09:54 PM	#5
ChrisJ MuchCoolerThanGTsetGO 2002 Mustang GT SLOW Join Date: Jun 2006 Location: Shepherdsville, Kentucky Posts: 16,281	You need to get a tune before you blow that engine sky high... Im serious... $10 says it is lean as a mofo... __________________ My Junk www.myspace.com/cjobe

January 22nd, 2008, 11:09 PM	#6
03GT_Hybrid Regular 2003 GT/ 4v Swap Join Date: Oct 2007 Location: Mahwah, NJ Posts: 107	Yea I am going to take it easy for a while. I have a cobra pump and 24 lb. injectors. If anything I think I may be a little rich but idk. I want to get a wideband before anything. Any suggestions? I was looking at autometer. __________________ 2003 GT 1999 4v swap Full Bolt ons

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January 23rd, 2008, 08:15 PM	#8
06RedfireGT Captain Of Team Leg Hump 2006 Mustang GT In the 13's Join Date: Aug 2006 Location: I'm so badass I make medicine cry Posts: 10,257	+1 That motor isn't going to last long with out a tune. __________________ Bassani Crew Member #1 Better to be judged by 12 then carried by six.

January 23rd, 2008, 10:05 PM	#9
03GT_Hybrid Regular 2003 GT/ 4v Swap Join Date: Oct 2007 Location: Mahwah, NJ Posts: 107	Ok, I am also throwing codes for no air intake temp sensor. Is this a problem cause I could se ehow that would affect the spark. I am going to get the SCT Pro Racer Package as soon as I can but I am working 2 jobs and still am not getting money fast enough! lol __________________ 2003 GT 1999 4v swap Full Bolt ons

January 23rd, 2008, 10:07 PM	#10
ChrisJ MuchCoolerThanGTsetGO 2002 Mustang GT SLOW Join Date: Jun 2006 Location: Shepherdsville, Kentucky Posts: 16,281	Yes you need to get an IAT in there... IAT - Intake Air Temp It tells the PCM when to pull timing and such because of the temp of the intake charge... __________________ My Junk www.myspace.com/cjobe

January 29th, 2008, 11:22 AM	#12
99cobradroptop Regular 99 Cobra Vert. Join Date: Jan 2008 Location: Annapolis, MD Posts: 143	I'll bet $100 its running leaner than S**t, think about it, you went fron 2v to 4v, you need more fuel for the added valves and since your comp. is still running like a 2v. its starving the motor at high rpms. Just my opinion __________________ JLT RAI, MAC LT's, bassani o/r X, M55's , Eibach Pro-kit lowering springs, eiback front and rear sway bars, solid axle swap, 31spl strange axles, 31spl diff. 3.73 gears, Pro 5.0 shifter, MM Full Length Subframe Connectors

January 30th, 2008, 01:55 PM	#13
FSTMRFR Newbie Join Date: Jan 2008 Posts: 21	subscribing...

January 31st, 2008, 12:34 AM	#15
1BADSTANG Hardcore Enthusiast Join Date: Sep 2007 Location: long island Posts: 1,512	subscribed. Dude.. shits lean __________________ 331s burn oil and have a bad piston to head ratio. http://www.StreetChallenge3D.com/sig...?referal=1BAD1 LOL @ THIS http://www.ihateyoujulia.com/?id=0a8...27aa2c6245e4c2

January 31st, 2008, 03:32 AM	#16
SSStang I Post Entirely Way Too Much 2k2 Mustang V6 Join Date: Feb 2007 Location: TEXAS Posts: 6,031	Please don't drive that car anymore man... Or your gonna be looking at parts on the ground. __________________ Selling for friend: Vortech Supercharge kit < 100miles.

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