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Surging since changed intake manifold?

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Started by 4G63EVO0, Mar 25 2014 02:37 AM

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11 replies to this topic

#1
4G63EVO0
Posted 25 March 2014 - 02:37 AM

4G63EVO0

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i recently changed my intake manifold from a duel runner vr4 cyclone one , to a n/a galant one and ive had a issue when you go to boost it kind of like wants to go but something is stopping it , it will boost but it like lags now now im using the vr4 throttle body still and using a 3inch air intake pipe to my vr4 turbo and vr4 afm

 

any help please cheers ?  


#2
Geo&Kez
Posted 25 March 2014 - 03:58 AM

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Check your wastegate & vacuum connections are right. Sounds like it might be open.


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#3
evo-gsr
Posted 25 March 2014 - 04:37 AM

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Im with George...make sure all your hoses/pipes and stuff are all connected / plugged in.


[qoute name="BMGTZ" post="331212" timestamp="1467451744"]I don't know anything ...
Trust in the master of taxis.... He will set you straight[/quote]

#4
4G63EVO0
Posted 25 March 2014 - 05:41 AM

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cheers mate

 

 

does it matter if im running the air hose from the rocker cover to the air intake pipe to afm? 


#5
Geo&Kez
Posted 25 March 2014 - 06:37 AM

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:-/ Jamo.....
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#6
evo-gsr
Posted 25 March 2014 - 07:47 AM

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The pipe from the rocker to the intake draws the oil vapours from the head and recirculates them back through the system. There are arguments for and against this idea...

Just tap a hole into the intake pipe and put a nipple on it so you can use it...Im guessing your intake doesnt have the nipple which is why your asking? 


[qoute name="BMGTZ" post="331212" timestamp="1467451744"]I don't know anything ...
Trust in the master of taxis.... He will set you straight[/quote]

#7
Geo&Kez
Posted 25 March 2014 - 08:13 AM

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Ok I understand now. Wouldn't the 'dirty air' from the rocker cover contaminate the afm if it was plumbed in before it? And no, I don't understand how this plumbing would influence the problem you described.
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#8
evo-gsr
Posted 25 March 2014 - 08:55 AM

evo-gsr

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Its usually plumbed in after the AFM George....to eliminate that problem.

And yeah...George is also right in saying that would have no influence on the problem you mentioned before.


[qoute name="BMGTZ" post="331212" timestamp="1467451744"]I don't know anything ...
Trust in the master of taxis.... He will set you straight[/quote]

#9
jack be nimble
Posted 25 March 2014 - 10:47 AM

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Agree. The air has been measured by the afm so it must port in after the afm. When you have manifold vacuum the engine sucks the 'dirty air' past the 1way valve and into manifold. When boosting the 1way valve is shut and the air goes into the intake, pre turbo.


Gotta boost test your new manifold, bet its leaking air
4g93t jumbuck conversion. PRANGED 18/3/12, CHECK MY MEMBER RIDES Page 11. no serious human injuries.
ON THE ENGINE STAND. g4cs 2.4l + Gt35r. PLUS: auto conversion + Awd coming.
thanks for parts and help: BMGTZ, EVOCPE, cwolf, Benozi, Jamo-GSR, 1JUM2NV, RXVII..much appreciated, cheers guys.
Aerodynamics are for people who can't build engines. —Enzo Ferrari
REMEMBER: you cant polish a turd, but you can roll it in glitter.

#10
4G63EVO0
Posted 26 March 2014 - 03:03 AM

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my air intake to afm has a nipple on it put will run with a different pipe and see if it makes a differnce? and i will check my intake manifold to cheers 


#11
evo-gsr
Posted 26 March 2014 - 06:12 AM

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Yep..boost leak test is a must...you will be amazed what you find....you can make one for under $10 too.


[qoute name="BMGTZ" post="331212" timestamp="1467451744"]I don't know anything ...
Trust in the master of taxis.... He will set you straight[/quote]

#12
jack be nimble
Posted 26 March 2014 - 01:22 PM

jack be nimble

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I have a thread here somewhere that I started with my $3.50 boost tester. Looks like you could smoke ganja with it...
4g93t jumbuck conversion. PRANGED 18/3/12, CHECK MY MEMBER RIDES Page 11. no serious human injuries.
ON THE ENGINE STAND. g4cs 2.4l + Gt35r. PLUS: auto conversion + Awd coming.
thanks for parts and help: BMGTZ, EVOCPE, cwolf, Benozi, Jamo-GSR, 1JUM2NV, RXVII..much appreciated, cheers guys.
Aerodynamics are for people who can't build engines. —Enzo Ferrari
REMEMBER: you cant polish a turd, but you can roll it in glitter.
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