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boostin problem need help badly

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boostin problem need help badly - 1/16/2008 7:32:41 PM   
lhausi2

 

Posts: 710
Joined: 11/5/2007
Status: offline 		aight my car boosts fine until it hits 4500 rpms. then it starts sputtering and will sputter every 500 rpm's after that. but this only happens when i floor it. if i let it build boost slowly it's fine. some ppl said maybe plugs and wires but i changed both of those already and it didn't change anything. someone also said maybe fuel cut, but i have a walbro fuel pump and rc 550cc injectors. and it never did it before. the only thing i can think of is that i need to tune my afc cuz i'm gettin' 11mpg on my 97 gst right now. also another weird thing is that it'll start sputtering once it hits 1.5 bar, which is 22psi i kno and that's wut it use to run. anyone have any ideas of how to fix this?
Post #: 1
RE: boostin problem need help badly - 1/16/2008 7:43:56 PM   
dsm1990gsx


Posts: 2954
Joined: 10/22/2007
Status: offline
dsm1990gsx's photo gallery 		Check for a boost leak.

_____________________________

2003 Ford Escape old ladys car
1990 Tsi Awd daily driver
2007 Jeep Wrangler power wheels daughters car...soon to be converted from 12v to 24v

(in reply to lhausi2)
Post #: 2
RE: boostin problem need help badly - 1/16/2008 7:53:03 PM   
lhausi2

 

Posts: 710
Joined: 11/5/2007
Status: offline 		really? alright i'll do a boost leak test on it sumtime this week

(in reply to dsm1990gsx)
Post #: 3
RE: boostin problem need help badly - 1/17/2008 12:54:38 PM   
dsm1990gsx


Posts: 2954
Joined: 10/22/2007
Status: offline
dsm1990gsx's photo gallery 		Also what do your plugs look like?  You could also be running way rich.

< Message edited by dsm1990gsx -- 1/17/2008 12:58:34 PM >

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2003 Ford Escape old ladys car
1990 Tsi Awd daily driver
2007 Jeep Wrangler power wheels daughters car...soon to be converted from 12v to 24v

(in reply to lhausi2)
Post #: 4
RE: boostin problem need help badly - 1/17/2008 2:10:23 PM   
lhausi2

 

Posts: 710
Joined: 11/5/2007
Status: offline 		First of all yes im running way rich, and I gave my buddy a ride in it so he could feel the sputter. And of course it didn't sputter a single fu***** time. I was so pissed and confused at the same time.

(in reply to dsm1990gsx)
Post #: 5
RE: boostin problem need help badly - 1/17/2008 2:58:26 PM   
Sebba


Posts: 14725
Joined: 2/20/2006
From: San Antonio, TX
Status: offline
Sebba's photo gallery 		change the plugs with NGK classics and change the wires with OEM wires

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These cranks are made for walkin'''', and thats just what they''''ll do, one of these days these cranks are gonna walk all over you

(in reply to lhausi2)
Post #: 6
RE: boostin problem need help badly - 1/17/2008 3:19:38 PM   
lhausi2

 

Posts: 710
Joined: 11/5/2007
Status: offline 		Well I have bpr7es plugs in there with oem wires. Got any other ideas?lol

(in reply to Sebba)
Post #: 7
RE: boostin problem need help badly - 1/17/2008 3:35:49 PM   
TheEngineer



Posts: 10730
Joined: 1/25/2006
Status: online
TheEngineer's photo gallery 		maybe the plugs arnt properly gaped. I know it seems like you ruled them out but i cant think of anything else that would cause this. Could possibly be the rich though. Do you have a wideband. Cuz if not you really need to get it

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quote:

ORIGINAL: pilsenblue
Even tho My car looks great It will never be fast. Kinda like a hot girl that dosent give it up


(in reply to lhausi2)
Post #: 8
RE: boostin problem need help badly - 1/17/2008 4:02:37 PM   
lhausi2

 

Posts: 710
Joined: 11/5/2007
Status: offline 		It cant believe it would be the sparkplugs, even after changing them. And besides how would it go away once my buddy gets in, its weird. And yeah emonz has been trying to make me get a wideband for the longest time now but im broke as a joke and can't afford one,lol unless sum1 wants to donate one for a good cause, there's nothing else it could be? Cuz I will change the plugs again if that's all it can be. And yeah I gapped them to 0.032

(in reply to TheEngineer)
Post #: 9
RE: boostin problem need help badly - 1/17/2008 4:31:33 PM   
TheEngineer



Posts: 10730
Joined: 1/25/2006
Status: online
TheEngineer's photo gallery 		i would just turn down the boost for now to be safe. Is the SAFC zero'd out or is it actually set on a tune

_____________________________



quote:

ORIGINAL: pilsenblue
Even tho My car looks great It will never be fast. Kinda like a hot girl that dosent give it up


(in reply to lhausi2)
Post #: 10
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