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car wont start after porting intake

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Old Jan 24, 2004 | 11:13 AM
  #1  
carbgeek's Avatar
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car wont start after porting intake

i pulled my intake off to port it and now the car starts for second then shuts back off any suggestions
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Old Jan 24, 2004 | 11:43 AM
  #2  
3.8TransAM's Avatar
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From: Schererville , IN
Car: 91 GTA, 91 Formula, 89 TTA
Engine: all 225+ RWHP
Transmission: all OD
Axle/Gears: Always the good ones
#1
Make sure everything is hooked back up correctly(vacuum lines electrical connections etc)

#2
Are u sure everything is installed into the correct orientation?(ie u dudnt swap runners side to side?) I've seen it done...

#3
Did u make sure the intake end seals are actually sealed? did u use silicone or the little rubber inserts that come with ther intake gasket?

#4
Install the distributor to tdc #1 cyl and correct firing order and the timing set correctly?

all i can think off the top of my head right now
Later
Jeremy
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Old Jan 24, 2004 | 11:52 AM
  #3  
Trickster's Avatar
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From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
Make sure all bolts are properly torqued to prevent any vacuum leaks.

The Trickster!!!!!!!!!!!
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Old Jan 24, 2004 | 12:32 PM
  #4  
doc's Avatar
doc
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From: Mims, Florida
Car: '87 IROCZ
Engine: 395 ZZ4
Transmission: ProBuilt 700R4
Axle/Gears: 9 bolt 3.70s
The porting could not be the reason for your problem. You did not put it back together properly. I dont know what it is, but you will find it eventually.

Do what the above posts suggest. You have alot to check.
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Old Jan 24, 2004 | 12:45 PM
  #5  
speed88's Avatar
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From: St. John's, NL, Canada
Car: 1988 Trans Am GTA
Engine: 383
Transmission: 700R4
Originally posted by 3.8TransAM
#1
Make sure everything is hooked back up correctly(vacuum lines electrical connections etc)

#2
Are u sure everything is installed into the correct orientation?(ie u dudnt swap runners side to side?) I've seen it done...

#3
Did u make sure the intake end seals are actually sealed? did u use silicone or the little rubber inserts that come with ther intake gasket?

#4
Install the distributor to tdc #1 cyl and correct firing order and the timing set correctly?

all i can think off the top of my head right now
Later
Jeremy
Do all of the checks that he recommended but also check you IAC. That's the peice underneath your throttle body. Was you throttle body knocked around or dropped when it was off the car? The sensor in the IAC may be gone. To check it, simply unscrew the sensor form the IAC housing and shake it gently, if you here any "peices" moving around then your IAC sensor is gone. Get a new one, plug it in, and away you go.

P.S. This is the experience I had when I ported my stock intake. Somehow the IAC got damaged and the car would'nt start.
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Old Jan 24, 2004 | 01:32 PM
  #6  
carbgeek's Avatar
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ok now it will run for 30 seconds then shut off its weird like its fuel or something but its holding pressure dunno
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Old Jan 24, 2004 | 01:35 PM
  #7  
speed88's Avatar
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From: St. John's, NL, Canada
Car: 1988 Trans Am GTA
Engine: 383
Transmission: 700R4
Ok well if ya want to get technical, then yes mine did start. It would stay going for a few seconds, surge up in the rpm, and then shut off. In order to keep it going I would have to hold the throttle as soon as it started. Check your IAC.
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Old Jan 24, 2004 | 03:57 PM
  #8  
dj haf's Avatar
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Joined: Aug 2003
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From: Miami, Florida
Car: 1990 IROC-Z
Engine: 350 L98
Transmission: 700R4
check your IAC and your TPS voltage since you were messing around with the intake and tb. is your car MAF or SD?
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Old Jan 26, 2004 | 01:07 PM
  #9  
bnoon's Avatar
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From: West Des Moines, IA
Car: 2008.5 Mazdaspeed 3 GT
Engine: 2.3 DISI Turbo
Transmission: 6 speed MT
When I did my SLP runners and ported the intake to match, I had to start the car ten times or so before it would stay running when it was all back together. It just took that long to work all of the air out of the fuel lines... even after *priming* the system by turning the key on, off, on, off several times to pump up the lines with the fuel pump.

Can you keep it running with the throttle or not?
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