02-13-2004
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#1
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New Member
Join Date: Jan 2004
Location: Louisiana
Posts: 13
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My car is a 1990 Mitsubishi Eclipse GSX and since Friday I have been having this problem.
The car acts like it's running out of gas @ about 5000 rpms....You give it gas slow it will take it but if you get it on it hard it won't take the gas...
It has been checked for boost leaks,the fuel pump has been checked, and the fuel filter has been changed.
For some reason to no matter what the boost is set on it jumps to 22 and the egts go through the roof like tapping out past 1600
Does anyone know what my problem could be?
Thanks!
The mods are
-ATR 3 inch exhaust with 02 elimanator d/p & testpipe
-buschur racing UIP with 1g bov polished piping
-2g maf w/dejon tool piping
-Profec-B Boost Controller
-16g turbo
-S-AFC
-digital tuning pocket logger, software and palm m100
-auto meter z series guages, boost and EGT
-ACT 2600 PP w/street disc
-taboo speedshop 1/4 longer slave cyc. rod
-welded the clutch linkage
-upgraded rear swaybar
-rear strut tower bracing
-brass trans shifter bushings
-symborski shift kit
-Bushur Fuel Punp
-650 FIC injectors
__________________
"This Eagle Flies Low"
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02-13-2004
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#2
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Join Date: Oct 2003
Location: Red Wing, MN
Drives: Too Many
Posts: 3,184
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Spark Plugs (GAP)? Plug wires.
Does it spitter and sputter when you hit 5000 rpm?
CRAIG
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02-13-2004
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#3
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Admin
Join Date: Oct 2003
Location: Sportsman's Paradise, LA.
Posts: 5,382
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Definately going lean, but you've got to get that boost under control first. Is your wastegate actuator working correctly? WHat are your S-AFC settings?
__________________
"You don't have a clue. You couldn't get a clue during the clue mating season in a field full of horny clues if you smeared your body with clue musk and did the clue mating dance."
When she get's bitchy, SPANK THAT ASS! (#Y#)
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02-13-2004
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#4
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R U DTF bro?
Join Date: Aug 2003
Location: Oak Point, TX
Drives: C8 Stingray Z51
Posts: 20,620
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Boost creep! You are either going to need a ported 2G o2 housing or a nice 2.5" tubular one from a selection of vendors. Just to make sure that it is not your boost controller failing run a hose directly from the turbo-outlet elbow to the wastegate nipple. Be sure to always zip-tie all vacuum lines when installing a boost controller.
__________________
Quote:
Originally Posted by Murlo26
I agree with Kracka.
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02-13-2004
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#5
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Admin
Join Date: Oct 2003
Location: Sportsman's Paradise, LA.
Posts: 5,382
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Quote:
Originally posted by TalonTSiDude@Feb 13 2004, 03:48 PM
Boost creep! You are either going to need a ported 2G o2 housing or a nice 2.5" tubular one from a selection of vendors.
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They are running a HRC O2 eliminator downpipe. It replaces the O2 housing.
__________________
"You don't have a clue. You couldn't get a clue during the clue mating season in a field full of horny clues if you smeared your body with clue musk and did the clue mating dance."
When she get's bitchy, SPANK THAT ASS! (#Y#)
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02-13-2004
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#6
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R U DTF bro?
Join Date: Aug 2003
Location: Oak Point, TX
Drives: C8 Stingray Z51
Posts: 20,620
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Oops didn't see that part. I would deffinately suspect the boost controller then. Still, try my test.
__________________
Quote:
Originally Posted by Murlo26
I agree with Kracka.
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02-18-2004
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#7
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New Member
Join Date: Jan 2004
Location: Louisiana
Posts: 13
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I have bypassed the boost controler and i have also changed the turbo to one that has been ported and a bigger wastegate installed and also checked the plug gap nothing seems to help.
__________________
"This Eagle Flies Low"
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02-18-2004
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#8
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back in the saddle again
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Sounds like it really needs a good tune.
What do you mean 'wont take the gas'? I see you have a 2g mas, that should kill mas overrun, how old is the fuel pump? How is the fuel pressure regulator doing? (stock, dead, aftermarket?) What fuel pressure are you running (baseline?) So if you put on a ported turbo, and hook up the boost controller lines to the FACTORY bcs, what happens?
__________________
My street car runs low 11's and my race car's personal best is a mid 11....
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02-18-2004
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#9
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Been there, done that.
Join Date: Oct 2003
Location: Camden, S.C.
Posts: 3,248
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swap spark plug wires. I had the same thing happen with my system.
started off not being able to go above 7200rpms and then over the coarse of the next 2 weeks before I swapped them. I couldn't rev past 5800rpms.
I could do it on light boost.. But if I was ever WOT it would buck and sputter. And then when I went to shift and go WOT directly it would just sputter and what not until I let the RPMS drop down to idle and then I could go WOT again.
-brian
__________________
1997 GSX - new ride
1997 GSX - dedicated track car
2004 R6 - sold
1992 GSX - sold
1996 GST - sold
1995 GSX - sold
Best 1/4 - 11.7 on 93oct
Best 1/4 MPH - 120mph
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02-18-2004
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#10
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Captain J-Sack
Join Date: Oct 2003
Location: Chicago, IL
Posts: 594
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if you hitting that much boost could it be that the boost controller was hooked up backwards?
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02-18-2004
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#11
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Admin
Join Date: Oct 2003
Location: Sportsman's Paradise, LA.
Posts: 5,382
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Quote:
Originally posted by Jacek@Feb 18 2004, 12:33 PM
if you hitting that much boost could it be that the boost controller was hooked up backwards?
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They ran a line straight from the intake mani to the wastegate actuator, made no difference.
__________________
"You don't have a clue. You couldn't get a clue during the clue mating season in a field full of horny clues if you smeared your body with clue musk and did the clue mating dance."
When she get's bitchy, SPANK THAT ASS! (#Y#)
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02-18-2004
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#12
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Captain J-Sack
Join Date: Oct 2003
Location: Chicago, IL
Posts: 594
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think it could be that the acuator is stuck?
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02-18-2004
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#13
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Admin
Join Date: Oct 2003
Location: Sportsman's Paradise, LA.
Posts: 5,382
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They swapped another complete 16g on it with the bigger flapper mod and it still creeps.
__________________
"You don't have a clue. You couldn't get a clue during the clue mating season in a field full of horny clues if you smeared your body with clue musk and did the clue mating dance."
When she get's bitchy, SPANK THAT ASS! (#Y#)
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02-18-2004
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#14
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Captain J-Sack
Join Date: Oct 2003
Location: Chicago, IL
Posts: 594
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maybe i should learn to read :headache:
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02-18-2004
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#15
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formerly ecoli
Join Date: Oct 2003
Location: On the dyno
Posts: 4,892
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external wastegate.
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02-19-2004
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#16
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back in the saddle again
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1) What are your afc settings?
2) Try to switch with someone with an external dumped 02 housing, see if that solves the creep?
__________________
My street car runs low 11's and my race car's personal best is a mid 11....
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