GS 400 forced induction problems
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Driver School Candidate
Joined: Jan 2005
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From: New York
GS 400 forced induction problems
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Have just modified GS 400 with supercharger kit from Rod Millen.upgraded wheels (19 x 8.5 fr
19x 10 r SSR) Brembo 14" fr Apex exaust, TRD sway bar(fr & r) Strut towers (fr & r) apex AFC,
valve body, torque convert., limited slip diff., tranny cooler) hve been experiencing problems wit erratic and at times major hsitation mostly on downshift from automatic mode... cruising at 2,500rpm...5th gear..65-70mph..then mash accelerator to the floor and nothing happens.. all power cuts off completely, yet engine does not stall.. once let up must accelerate more easily.
I assume this is computer issue. My tuner is baffled. People at Millen are baffled. Anyone recommend a New York area tuner with strong diagnostic equipment/ and Lexus computer
experience. Anyone else have this problem?
ps. car works fine going from standstill and mash to floor. Shifts are all fine, acceleration excellent on the upshift. should'nt be injectors or AFC, or plugs etc.
(516)579-4767
Have just modified GS 400 with supercharger kit from Rod Millen.upgraded wheels (19 x 8.5 fr
19x 10 r SSR) Brembo 14" fr Apex exaust, TRD sway bar(fr & r) Strut towers (fr & r) apex AFC,
valve body, torque convert., limited slip diff., tranny cooler) hve been experiencing problems wit erratic and at times major hsitation mostly on downshift from automatic mode... cruising at 2,500rpm...5th gear..65-70mph..then mash accelerator to the floor and nothing happens.. all power cuts off completely, yet engine does not stall.. once let up must accelerate more easily.
I assume this is computer issue. My tuner is baffled. People at Millen are baffled. Anyone recommend a New York area tuner with strong diagnostic equipment/ and Lexus computer
experience. Anyone else have this problem?
ps. car works fine going from standstill and mash to floor. Shifts are all fine, acceleration excellent on the upshift. should'nt be injectors or AFC, or plugs etc.
(516)579-4767
Joined: Feb 2001
Posts: 31,944
Likes: 2,737
From: North Carolina
Bobby,
Welcome to ClubLexus! I've got a GS very similarly modified to yours (RMM SC, brembos, 19" wheels, etc)
I'm moving your post to the correct forum - you put it in the classifieds.
I'd recommend you take a 2 hour drive down the road to Maryland and take your car to SRT. They've installed and tuned (at least) two RMM superchargers including mine. http://www.swiftracing.com/
Questions:
1) Are you using any sort of engine / air/fuel management?
2) Does the power cut out at or near redline?
Welcome to ClubLexus! I've got a GS very similarly modified to yours (RMM SC, brembos, 19" wheels, etc)
I'm moving your post to the correct forum - you put it in the classifieds.
I'd recommend you take a 2 hour drive down the road to Maryland and take your car to SRT. They've installed and tuned (at least) two RMM superchargers including mine. http://www.swiftracing.com/
Questions:
1) Are you using any sort of engine / air/fuel management?
2) Does the power cut out at or near redline?
Last edited by DaveGS4; Jan 24, 2005 at 07:43 AM.
Dave is 100% correct, it would be well worth the drive. I had my GS tuned by three different shops it he MD area before SRT hooked it up, I gained roughly 30rwhp and the car ran perfect after that tuning session. By the way, it had the RMM SC kit on it as well.......Dave is real familiar with it. 
Lexus Fanatic
Joined: Dec 2003
Posts: 14,523
Likes: 3
From: new jersey
Originally Posted by DaveGS4
Bobby,
I'd recommend you take a 2 hour drive down the road to Maryland and take your car to SRT.
I'd recommend you take a 2 hour drive down the road to Maryland and take your car to SRT.
having just made this trip its about 3-31/2 hrs
but well worth it
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