383 tpi help
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Joined: Jun 2002
Posts: 265
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From: Alice, TX
Car: 89 Pontiac GTA Trans Am
Engine: T.P.I. 383 Stroker
Transmission: Monster 700R4
383 tpi help
well i finally got my car working. its a 383 stroker what should i set my setting like tps and fuel pressure at?
Joined: Feb 2000
Posts: 1,855
Likes: 13
From: St. Augustine, FL
Car: 89 GTA
Engine: 383
Transmission: 4L80E
Axle/Gears: 12 bolt-3.73
My tps is as high as it will go without setting a code which is .60-.62. Fuel pressure is up to you. Mine is at 48psi.
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Joined: Dec 2003
Posts: 2,391
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From: Newark, DE
Car: '86 Camaro, '02 WRX, '87 K5, '67
Engine: 350 TPI, 2.0turbo, 383 in the works, 289-4BBL, 232, A-head 4-cylinder
Transmission: T56, 5-speed, 700R4, C4, T176, semi-auto 2-speed
Axle/Gears: 3.73, 3.90, 4.88, 3.55, 3.54, 7.00
TPS voltage is factory at .57 I believe. Going higher will net you a bit of a performance increase. .62 is about the practical limit.
Fuel pressure depends on what the motor needa at WOT. Higher pressure and lower pulsewidth will improve atomization and performance. Take some EGT readings and figure it out.
Fuel pressure depends on what the motor needa at WOT. Higher pressure and lower pulsewidth will improve atomization and performance. Take some EGT readings and figure it out.
Thread Starter
Member
Joined: Jun 2002
Posts: 265
Likes: 0
From: Alice, TX
Car: 89 Pontiac GTA Trans Am
Engine: T.P.I. 383 Stroker
Transmission: Monster 700R4
its weird sometimes when i drive my car the idle will surge up and down. sometimes surges so low my car dies. what could that be?
Supreme Member
Joined: Dec 2003
Posts: 2,391
Likes: 1
From: Newark, DE
Car: '86 Camaro, '02 WRX, '87 K5, '67
Engine: 350 TPI, 2.0turbo, 383 in the works, 289-4BBL, 232, A-head 4-cylinder
Transmission: T56, 5-speed, 700R4, C4, T176, semi-auto 2-speed
Axle/Gears: 3.73, 3.90, 4.88, 3.55, 3.54, 7.00
VSS not working properly springs to mind. Could also be a short in the park/neutral switch if it's an automatic.
Thread Starter
Member
Joined: Jun 2002
Posts: 265
Likes: 0
From: Alice, TX
Car: 89 Pontiac GTA Trans Am
Engine: T.P.I. 383 Stroker
Transmission: Monster 700R4
its maf and the park neutral switch could cause it to surge?
Last edited by demon138; Feb 16, 2004 at 05:21 PM.
Supreme Member
Joined: Dec 2003
Posts: 2,391
Likes: 1
From: Newark, DE
Car: '86 Camaro, '02 WRX, '87 K5, '67
Engine: 350 TPI, 2.0turbo, 383 in the works, 289-4BBL, 232, A-head 4-cylinder
Transmission: T56, 5-speed, 700R4, C4, T176, semi-auto 2-speed
Axle/Gears: 3.73, 3.90, 4.88, 3.55, 3.54, 7.00
The VSS is the vehicle speed sensor. It helps to govern the control of among other things the IAC and EGR functions. Later cars had a VSS in the trans, also used for speedo. Older cable drive speedo cars have a VSS built into the speedometer. It sends information to the ECM telling it how fast the car is going and other information.
On the shifter part of the assembly that plugs into the shifter mechanism is a park/neutral switch. If this switch is physically bridged or is shorting out (going to ground) it can tell the ECU that the car is in park or neutral when it is really in gear. This can lead to a screwy idle while in gear and stalling and other annoying problems.
On the shifter part of the assembly that plugs into the shifter mechanism is a park/neutral switch. If this switch is physically bridged or is shorting out (going to ground) it can tell the ECU that the car is in park or neutral when it is really in gear. This can lead to a screwy idle while in gear and stalling and other annoying problems.
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