Ok basicly at 1500 RPM no matter how fast im goin my car feels like its bucking almost it doest feel like a miss any ideads what it is its only at 1500 RPM not lower not higher well around 1500 anywas

 

had this prob with my girl friends chevy astro van. yeah anything under 1500rpm or just lightly on the gas cruising it starts bucking. if you give it gas it goes away right.trust me its your transmission 700r4
i disconnected the overdrive it doesent do it very often now but its just temporary when i did that it cured 75% of the bucking
i told her to take it in and have someone look at it.

 

i just posted the same question two days ago FastRS, except mine starting doing the same thing after i installed new platinum +4's, i think they either caused some misfiring or arching in the distributor cap. I havent figured it out totally but post if u find out what it is please.

------------------
91 Blue RS with ASCD SS hood w/hood pins, Flowmaster 80 series w/3 inch dual exhaust, K&N, Hypertech Power Chip, Bosch Platinum wires and plugs.(19 years old and all this bought and paid for by myself, except the car that was paid for by State Farm...long story with the minor fender benders and them not wanting to pay for repairs...mwahaha)

 

It still did that after a complete tune up

 

fast RS, 2 questions how new is your tranny? was it rebuilt 100% correctly?

does it NOT buck if you are really light on the throttle, and also NOT in WOT?

if so, mine does it too. my tranny was rebuilt in july, it's been worse as of late. last thing I and my mechanic friend can figure is that it's a checkball out of place in the valvebody. the tranny had everything transferred over other than the valvebody and the governor gear. it doesn't shift into D (3rd) @ WOT and shifts into second @ 4700, even If I try to manually hold it in first. we figured it was the governor gear. nope changed it today. no dice. He still has my shell laying around @ the shop. last resort is the valvebody. the valvebody in it now is from a '88 s10 w/ a TBI 2.8. maybe the valvebodies are different. anybody know. either way, I figure swap valve bodies, and see how it goes.

------------------
1988 Camaro Sport Coupe
2.8 V6, TCI 3200 Stall TC, B&M Transkit, 80 Series Flowmaster w/ Catback, '85 Firebird SE 3.73 Rear (soon)
'83 CFI Z/28 Hood, '87 16" IROC Wheels on Kumho Ecsta Supra 712's, '92 Z/28 Bowtie Grille
IROC Gauges, IROC Taillights, IROC Foglamps w/ retrofitted 9005 hi-beam headlight bulbs

1985 Firebird SE
2.5 I4, T-5, 3.73 rear (going to the sport coupe)
Beat to a pulp.

 

It only does it at light throtle it seems liek and only around 1500 rpm... Im gonna take it to the tanny shop see what they say. Its been rebuilt 3 times in a little over a year lasttime it was rebuilt was in november.

 

btw, I think the valvebodies are different, since truck 2.8's prolly shifted gears @ 5000. so, It might be a checkball. my car has sucked performance wise since last year, and I hope this brings it back.

------------------
1988 Camaro Sport Coupe
2.8 V6, TCI 3200 Stall TC, B&M Transkit, 80 Series Flowmaster w/ Catback, '85 Firebird SE 3.73 Rear (soon)
'83 CFI Z/28 Hood, '87 16" IROC Wheels on Kumho Ecsta Supra 712's, '92 Z/28 Bowtie Grille
IROC Gauges, IROC Taillights, IROC Foglamps w/ retrofitted 9005 hi-beam headlight bulbs

1985 Firebird SE
2.5 I4, T-5, 3.73 rear (going to the sport coupe)
Beat to a pulp.

 

oh yeah, the moral of the story is that you should make sure the checkballs are in the proper locations.

------------------
1988 Camaro Sport Coupe
2.8 V6, TCI 3200 Stall TC, B&M Transkit, 80 Series Flowmaster w/ Catback, '85 Firebird SE 3.73 Rear (soon)
'83 CFI Z/28 Hood, '87 16" IROC Wheels on Kumho Ecsta Supra 712's, '92 Z/28 Bowtie Grille
IROC Gauges, IROC Taillights, IROC Foglamps w/ retrofitted 9005 hi-beam headlight bulbs

1985 Firebird SE
2.5 I4, T-5, 3.73 rear (going to the sport coupe)
Beat to a pulp.

 

My 2.8 Blazer did the same thing, except it would do it throughout the entire throttle range, and it felt like a miss sorta. It wasn't quite as bad. What was weird is it would do it for a while (2-3 weeks) then completely stop for a while, and start again. Never did find the problem, I sold it to buy my car while it was in one of its good moods.

 

Try replacing the pickup coil. My 89 used to have this problem a lot, and it was ALWAYS the coil. I probably replaced it 5 or 6 times in 2 years.

Vman

------------------
1969 Camaro Sport Coupe
383, 700R4, leather, everything black but the lights

Previous owner of an 89 RS Camaro
2.8L V6, 700R4

 

It fells liek its the tranny but ive herd abotu the coil to... Dont you love how one simple problme can be a list of stuff..

 

the ignition coil? I changed it in dec. might be. prolly not in my case. I think I'm gonna shoot myself if I can't figure out the prob. might be a combination of tranny and a loose gas line in my case. anyone wanna buy my car? $2500


------------------
1988 Camaro Sport Coupe
2.8 V6, TCI 3200 Stall TC, B&M Transkit, 80 Series Flowmaster w/ Catback, '85 Firebird SE 3.73 Rear (soon)
'83 CFI Z/28 Hood, '87 16" IROC Wheels on Kumho Ecsta Supra 712's, '92 Z/28 Bowtie Grille
IROC Gauges, IROC Taillights, IROC Foglamps w/ retrofitted 9005 hi-beam headlight bulbs

1985 Firebird SE
2.5 I4, T-5, 3.73 rear (going to the sport coupe)
Beat to a pulp.

 

sorry vortex, I misread your post

------------------
1988 Camaro Sport Coupe
2.8 V6, TCI 3200 Stall TC, B&M Transkit, 80 Series Flowmaster w/ Catback, '85 Firebird SE 3.73 Rear (soon)
'83 CFI Z/28 Hood, '87 16" IROC Wheels on Kumho Ecsta Supra 712's, '92 Z/28 Bowtie Grille
IROC Gauges, IROC Taillights, IROC Foglamps w/ retrofitted 9005 hi-beam headlight bulbs

1985 Firebird SE
2.5 I4, T-5, 3.73 rear (going to the sport coupe)
Beat to a pulp.