Engine bogging and sometimes jumpy upon acceleration
Thread Starter
Senior Member
Joined: Jun 2001
Posts: 922
Likes: 33
From: Kansas
Car: 91 Z28
Engine: 6.0L LQ9
Transmission: T56
Axle/Gears: Dana 44 3.92
Engine bogging and sometimes jumpy upon acceleration
Need some help here. My car started bogging under normal acceleration recently and now it also jumps a little. It only does it when I'm accelerating, around 1500-2100 rpms. It doesn't do it when its in neutral or park. Could it be the tranny? Maybe the TPS? Oh yeah, the car is a 91 Z with 350 TPI and of course the 700-R4. Any help would be appreciated. Thanks in advance.
Marc
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Don't get on it if you can't stay with it! You lift You LOSE!
[This message has been edited by STREETDEMON (edited August 23, 2001).]
Marc
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Don't get on it if you can't stay with it! You lift You LOSE!
[This message has been edited by STREETDEMON (edited August 23, 2001).]
Supreme Member
Joined: Mar 2001
Posts: 2,173
Likes: 0
From: Ontario, Canada
Just a total shot in the dark Marc but when is the last time you changed the plugs and/or wires? Just thought I would mention that, because if it hasn't been done recently, a tune-up can make all the difference in the world.
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1987 Camaro IROC-Z
350 TPI (L98), HyperTech Airfoil, K&N Filters and modified airboxes, AC Delco RapidFires, Taylor SpiroPro 8mm wires, Energy Suspension polyurethane bushings for front and rear LCAs and sway bars, KYB struts and shocks, BFG g-Force Z-rated tires, MAC STB, MAC SFCs, JET low temp stat, CarSound Hi-flow Cat, DynoMax 3" Mandrel-bent pipes, Flowmaster muffler, 3" chrome tailpipes, Corvette Servo, TransGo Shift Kit, Corvette 2000 Stall, TruCool LPD tranny cooler, T-tops, and White exterior with red leather interior.
2001 Sunfire GT
Bone stock 2.4L, 5-speed, K&N cone filter, interior detailing, 200W Monsoon Sound System (8 speakers), Silver Metallic exterior with grey interior.
3rd Place Stock Class at annual 2001 JCO Bash
Web: http://www.angelfire.com/on3/whitelightening
------------------
1987 Camaro IROC-Z
350 TPI (L98), HyperTech Airfoil, K&N Filters and modified airboxes, AC Delco RapidFires, Taylor SpiroPro 8mm wires, Energy Suspension polyurethane bushings for front and rear LCAs and sway bars, KYB struts and shocks, BFG g-Force Z-rated tires, MAC STB, MAC SFCs, JET low temp stat, CarSound Hi-flow Cat, DynoMax 3" Mandrel-bent pipes, Flowmaster muffler, 3" chrome tailpipes, Corvette Servo, TransGo Shift Kit, Corvette 2000 Stall, TruCool LPD tranny cooler, T-tops, and White exterior with red leather interior.
2001 Sunfire GT
Bone stock 2.4L, 5-speed, K&N cone filter, interior detailing, 200W Monsoon Sound System (8 speakers), Silver Metallic exterior with grey interior.
3rd Place Stock Class at annual 2001 JCO Bash
Web: http://www.angelfire.com/on3/whitelightening
Supreme Member
Joined: Sep 1999
Posts: 3,197
Likes: 10
From: Manassas VA
Car: 04 GTO
Engine: LS1
Transmission: M12 T56
Could be a TPS on it's way out. That would allow the TCC to lock incorrectly, causing a bog and then a jump when it released. Check the TPS for ~ 0.5V with eththrottle close, and a smooth steady increase as you open the throttle. The procedure must be outlined 9000 times by now on these boards so i'm not gonna retype it now, just doa search if you don't know how to check it.
...ed
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Ed Maher - Moderator @ The TPI & Carb Boards
92 Z28 Convertible - Quasar blue / Tan top
LB9 4L60 GU2 G80 - stock, soon to be sleeper
-=ICON Motorsports=-
- Definitely prototypes, high powered mutants of some kind. Too weird to live, too cool to die
...ed
------------------
Ed Maher - Moderator @ The TPI & Carb Boards
92 Z28 Convertible - Quasar blue / Tan top
LB9 4L60 GU2 G80 - stock, soon to be sleeper
-=ICON Motorsports=-
- Definitely prototypes, high powered mutants of some kind. Too weird to live, too cool to die
Thread Starter
Senior Member
Joined: Jun 2001
Posts: 922
Likes: 33
From: Kansas
Car: 91 Z28
Engine: 6.0L LQ9
Transmission: T56
Axle/Gears: Dana 44 3.92
Thanks for the input so far. Irocker, I did a tune up close to one year ago sometime this month. I changed the plugs, rotor cap, rotor, plug wires, fuel filter, and changed the tranny fluid. I'll have to check the TPS, its one of those things I've been putting off.
Supreme Member
Joined: Mar 2001
Posts: 2,173
Likes: 0
From: Ontario, Canada
TPS is defiantely a fore runner then. Another thing is the MAF, but unfortunately there is no real way to check. Mine went and it did some real funny things, like not being able to rev above 3500RPM, to stalling the car, to making the acceleration jumpy...And it never once threw a code. But like Ed said, definately check the TPS first.
Good luck!
------------------
1987 Camaro IROC-Z
350 TPI (L98), HyperTech Airfoil, K&N Filters and modified airboxes, AC Delco RapidFires, Taylor SpiroPro 8mm wires, Energy Suspension polyurethane bushings for front and rear LCAs and sway bars, KYB struts and shocks, BFG g-Force Z-rated tires, MAC STB, MAC SFCs, JET low temp stat, CarSound Hi-flow Cat, DynoMax 3" Mandrel-bent pipes, Flowmaster muffler, 3" chrome tailpipes, Corvette Servo, TransGo Shift Kit, Corvette 2000 Stall, TruCool LPD tranny cooler, T-tops, and White exterior with red leather interior.
2001 Sunfire GT
Bone stock 2.4L, 5-speed, K&N cone filter, interior detailing, 200W Monsoon Sound System (8 speakers), Silver Metallic exterior with grey interior.
3rd Place Stock Class at annual 2001 JCO Bash
Web: http://www.angelfire.com/on3/whitelightening
Good luck!
------------------
1987 Camaro IROC-Z
350 TPI (L98), HyperTech Airfoil, K&N Filters and modified airboxes, AC Delco RapidFires, Taylor SpiroPro 8mm wires, Energy Suspension polyurethane bushings for front and rear LCAs and sway bars, KYB struts and shocks, BFG g-Force Z-rated tires, MAC STB, MAC SFCs, JET low temp stat, CarSound Hi-flow Cat, DynoMax 3" Mandrel-bent pipes, Flowmaster muffler, 3" chrome tailpipes, Corvette Servo, TransGo Shift Kit, Corvette 2000 Stall, TruCool LPD tranny cooler, T-tops, and White exterior with red leather interior.
2001 Sunfire GT
Bone stock 2.4L, 5-speed, K&N cone filter, interior detailing, 200W Monsoon Sound System (8 speakers), Silver Metallic exterior with grey interior.
3rd Place Stock Class at annual 2001 JCO Bash
Web: http://www.angelfire.com/on3/whitelightening
Supreme Member
Joined: Sep 1999
Posts: 3,197
Likes: 10
From: Manassas VA
Car: 04 GTO
Engine: LS1
Transmission: M12 T56
<font face="Verdana, Arial" size="2">Originally posted by IROCKER:
TPS is defiantely a fore runner then. Another thing is the MAF, but unfortunately there is no real way to check. Mine went and it did some real funny things, like not being able to rev above 3500RPM, to stalling the car, to making the acceleration jumpy...And it never once threw a code. But like Ed said, definately check the TPS first.
Good luck!
</font>
TPS is defiantely a fore runner then. Another thing is the MAF, but unfortunately there is no real way to check. Mine went and it did some real funny things, like not being able to rev above 3500RPM, to stalling the car, to making the acceleration jumpy...And it never once threw a code. But like Ed said, definately check the TPS first.
Good luck!
</font>
Supreme Member
Joined: Mar 2001
Posts: 2,173
Likes: 0
From: Ontario, Canada
Oh, didn't know it was a 91...If no the TPS then, could there be something wrong with the speed density setup? Never had a SD car so I'm totally guessing here.
------------------
1987 Camaro IROC-Z
350 TPI (L98), HyperTech Airfoil, K&N Filters and modified airboxes, AC Delco RapidFires, Taylor SpiroPro 8mm wires, Energy Suspension polyurethane bushings for front and rear LCAs and sway bars, KYB struts and shocks, BFG g-Force Z-rated tires, MAC STB, MAC SFCs, JET low temp stat, CarSound Hi-flow Cat, DynoMax 3" Mandrel-bent pipes, Flowmaster muffler, 3" chrome tailpipes, Corvette Servo, TransGo Shift Kit, Corvette 2000 Stall, TruCool LPD tranny cooler, T-tops, and White exterior with red leather interior.
2001 Sunfire GT
Bone stock 2.4L, 5-speed, K&N cone filter, interior detailing, 200W Monsoon Sound System (8 speakers), Silver Metallic exterior with grey interior.
3rd Place Stock Class at annual 2001 JCO Bash
Web: http://www.angelfire.com/on3/whitelightening
------------------
1987 Camaro IROC-Z
350 TPI (L98), HyperTech Airfoil, K&N Filters and modified airboxes, AC Delco RapidFires, Taylor SpiroPro 8mm wires, Energy Suspension polyurethane bushings for front and rear LCAs and sway bars, KYB struts and shocks, BFG g-Force Z-rated tires, MAC STB, MAC SFCs, JET low temp stat, CarSound Hi-flow Cat, DynoMax 3" Mandrel-bent pipes, Flowmaster muffler, 3" chrome tailpipes, Corvette Servo, TransGo Shift Kit, Corvette 2000 Stall, TruCool LPD tranny cooler, T-tops, and White exterior with red leather interior.
2001 Sunfire GT
Bone stock 2.4L, 5-speed, K&N cone filter, interior detailing, 200W Monsoon Sound System (8 speakers), Silver Metallic exterior with grey interior.
3rd Place Stock Class at annual 2001 JCO Bash
Web: http://www.angelfire.com/on3/whitelightening
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