firehawk auto tranny issues
firehawk auto tranny issues this is long but i need help so please stick with me lol
hello all, i have a 2000 firehawk, stock with a lid, long tubes and catback that i think is having either a throttle cable issue or a transmission issue. the backstory is i picked this firehawk up the other day, its my 3rd f body so im pretty used to how they are supposed to launch and feel, and this one doesnt really do much of that and ill describe. first off when i got it it had an extra spring attached to the the arm on the throttle body that went to the lid, just made it harder to open and stiffer feel of the gas pedal. so i removed the spring. the car itself drives fine without stumbling or any issues, idles a little low, sitting in park idle is 520 and sitting in drive idle is 650. flooring it from a dead stop in OD feels like launching in 3rd gear, no put you in your seat feeling and car feels like its down 150hp. and while cruising at any speed, say 60mph even, when i floor it it just accelerates from its current gear and doesnt downshift, if im going faster say 70-80 and floor it it does seem to downshift 1 gear and go from there but very poor acceleration for an f body, would have been better if it downshifted 2 stages. another thing i noticed is with my other f bodys, cruising at say 45-50 or 60 even i could double tap the gas pedal and it would downshift 2 gears and punch it, with nice hard acceleration, whereas with this firehawk double tap does nothing. just continues on in its current gear. and dig launches as i mentioned above feel really slow like its not in first at all. as result the car isnt really that fast and theres an issue somewhere. another thing i noticed is if im cruising at 45-50 and manually downshift it to 2nd from OD and punch it it feels exactly like it should, just i had to manually do it. however if i downshift into 1st manually from 40 or so and punch it, nothing, again it feels like 3rd gear or like its still in OD. almost like 1st gear isnt there lol. from a dig, i can shift it into first manually and punch it and again, feels like 3rd, just slow acceleration for what it should be, not even close to spinning the tires from a launch or anything. i did notice as well that from a dig, manually in 1st, if i went to WOT the car would not upshift, would just keep going till redline and i would shift it to 2nd, nothing, 3rd, nothing. only OD would shift it. however if i was cruising and downshifted manually to 3rd or 2nd and went to WOT i could still upshift. i replaced the TPS with a new one so its not that. i did notice that i could fully depress the pedal and the arm was about a 1/2 inch away from the bump stop so i know the TB wasnt fully open, i shortend the cable on the TB arm just a little bit and now fully depressing the pedal brings it within a centimeter of the bump stop and the car idles much better, almost too high actually. but still no change on the downshifting and performance. also another thing to mention when rolling to a stop in OD with the brakes the trans "jolts" usually right before i stop when its downshifting back to first. can feel it more than i should and the car lunges a little bit because of it. never felt that before on any of my previous F bodys.
hello all, i have a 2000 firehawk, stock with a lid, long tubes and catback that i think is having either a throttle cable issue or a transmission issue. the backstory is i picked this firehawk up the other day, its my 3rd f body so im pretty used to how they are supposed to launch and feel, and this one doesnt really do much of that and ill describe. first off when i got it it had an extra spring attached to the the arm on the throttle body that went to the lid, just made it harder to open and stiffer feel of the gas pedal. so i removed the spring. the car itself drives fine without stumbling or any issues, idles a little low, sitting in park idle is 520 and sitting in drive idle is 650. flooring it from a dead stop in OD feels like launching in 3rd gear, no put you in your seat feeling and car feels like its down 150hp. and while cruising at any speed, say 60mph even, when i floor it it just accelerates from its current gear and doesnt downshift, if im going faster say 70-80 and floor it it does seem to downshift 1 gear and go from there but very poor acceleration for an f body, would have been better if it downshifted 2 stages. another thing i noticed is with my other f bodys, cruising at say 45-50 or 60 even i could double tap the gas pedal and it would downshift 2 gears and punch it, with nice hard acceleration, whereas with this firehawk double tap does nothing. just continues on in its current gear. and dig launches as i mentioned above feel really slow like its not in first at all. as result the car isnt really that fast and theres an issue somewhere. another thing i noticed is if im cruising at 45-50 and manually downshift it to 2nd from OD and punch it it feels exactly like it should, just i had to manually do it. however if i downshift into 1st manually from 40 or so and punch it, nothing, again it feels like 3rd gear or like its still in OD. almost like 1st gear isnt there lol. from a dig, i can shift it into first manually and punch it and again, feels like 3rd, just slow acceleration for what it should be, not even close to spinning the tires from a launch or anything. i did notice as well that from a dig, manually in 1st, if i went to WOT the car would not upshift, would just keep going till redline and i would shift it to 2nd, nothing, 3rd, nothing. only OD would shift it. however if i was cruising and downshifted manually to 3rd or 2nd and went to WOT i could still upshift. i replaced the TPS with a new one so its not that. i did notice that i could fully depress the pedal and the arm was about a 1/2 inch away from the bump stop so i know the TB wasnt fully open, i shortend the cable on the TB arm just a little bit and now fully depressing the pedal brings it within a centimeter of the bump stop and the car idles much better, almost too high actually. but still no change on the downshifting and performance. also another thing to mention when rolling to a stop in OD with the brakes the trans "jolts" usually right before i stop when its downshifting back to first. can feel it more than i should and the car lunges a little bit because of it. never felt that before on any of my previous F bodys.
this is long but i need help so please stick with me lol
hello all, i have a 2000 firehawk, stock with a lid, long tubes and catback that i think is having either a throttle cable issue or a transmission issue. the backstory is i picked this firehawk up the other day, its my 3rd f body so im pretty used to how they are supposed to launch and feel, and this one doesnt really do much of that and ill describe.
first off when i got it it had an extra spring attached to the the arm on the throttle body that went to the lid, just made it harder to open and stiffer feel of the gas pedal. so i removed the spring. the car itself drives fine without stumbling or any issues, idles a little low, sitting in park idle is 520 and sitting in drive idle is 650.
flooring it from a dead stop in OD feels like launching in 3rd gear, no put you in your seat feeling and car feels like its down 150hp. and while cruising at any speed, say 60mph even, when i floor it it just accelerates from its current gear and doesnt downshift, if im going faster say 70-80 and floor it it does seem to downshift 1 gear and go from there but very poor acceleration for an f body, would have been better if it downshifted 2 stages.
another thing i noticed is with my other f bodys, cruising at say 45-50 or 60 even i could double tap the gas pedal and it would downshift 2 gears and punch it, with nice hard acceleration, whereas with this firehawk double tap does nothing.
just continues on in its current gear. and dig launches as i mentioned above feel really slow like its not in first at all. as result the car isnt really that fast and theres an issue somewhere. another thing i noticed is if im cruising at 45-50 and manually downshift it to 2nd from OD and punch it it feels exactly like it should, just i had to manually do it.
however if i downshift into 1st manually from 40 or so and punch it, nothing, again it feels like 3rd gear or like its still in OD. almost like 1st gear isnt there lol. from a dig, i can shift it into first manually and punch it and again, feels like 3rd, just slow acceleration for what it should be, not even close to spinning the tires from a launch or anything.
i did notice as well that from a dig, manually in 1st, if i went to WOT the car would not upshift, would just keep going till redline and i would shift it to 2nd, nothing, 3rd, nothing. only OD would shift it.
however if i was cruising and downshifted manually to 3rd or 2nd and went to WOT i could still upshift. i replaced the TPS with a new one so its not that. i did notice that i could fully depress the pedal and the arm was about a 1/2 inch away from the bump stop so i know the TB wasnt fully open,
i shortend the cable on the TB arm just a little bit and now fully depressing the pedal brings it within a centimeter of the bump stop and the car idles much better, almost too high actually. but still no change on the downshifting and performance.
also another thing to mention when rolling to a stop in OD with the brakes the trans "jolts" usually right before i stop when its downshifting back to first. can feel it more than i should and the car lunges a little bit because of it. never felt that before on any of my previous F bodys.
hello all, i have a 2000 firehawk, stock with a lid, long tubes and catback that i think is having either a throttle cable issue or a transmission issue. the backstory is i picked this firehawk up the other day, its my 3rd f body so im pretty used to how they are supposed to launch and feel, and this one doesnt really do much of that and ill describe.
first off when i got it it had an extra spring attached to the the arm on the throttle body that went to the lid, just made it harder to open and stiffer feel of the gas pedal. so i removed the spring. the car itself drives fine without stumbling or any issues, idles a little low, sitting in park idle is 520 and sitting in drive idle is 650.
flooring it from a dead stop in OD feels like launching in 3rd gear, no put you in your seat feeling and car feels like its down 150hp. and while cruising at any speed, say 60mph even, when i floor it it just accelerates from its current gear and doesnt downshift, if im going faster say 70-80 and floor it it does seem to downshift 1 gear and go from there but very poor acceleration for an f body, would have been better if it downshifted 2 stages.
another thing i noticed is with my other f bodys, cruising at say 45-50 or 60 even i could double tap the gas pedal and it would downshift 2 gears and punch it, with nice hard acceleration, whereas with this firehawk double tap does nothing.
just continues on in its current gear. and dig launches as i mentioned above feel really slow like its not in first at all. as result the car isnt really that fast and theres an issue somewhere. another thing i noticed is if im cruising at 45-50 and manually downshift it to 2nd from OD and punch it it feels exactly like it should, just i had to manually do it.
however if i downshift into 1st manually from 40 or so and punch it, nothing, again it feels like 3rd gear or like its still in OD. almost like 1st gear isnt there lol. from a dig, i can shift it into first manually and punch it and again, feels like 3rd, just slow acceleration for what it should be, not even close to spinning the tires from a launch or anything.
i did notice as well that from a dig, manually in 1st, if i went to WOT the car would not upshift, would just keep going till redline and i would shift it to 2nd, nothing, 3rd, nothing. only OD would shift it.
however if i was cruising and downshifted manually to 3rd or 2nd and went to WOT i could still upshift. i replaced the TPS with a new one so its not that. i did notice that i could fully depress the pedal and the arm was about a 1/2 inch away from the bump stop so i know the TB wasnt fully open,
i shortend the cable on the TB arm just a little bit and now fully depressing the pedal brings it within a centimeter of the bump stop and the car idles much better, almost too high actually. but still no change on the downshifting and performance.
also another thing to mention when rolling to a stop in OD with the brakes the trans "jolts" usually right before i stop when its downshifting back to first. can feel it more than i should and the car lunges a little bit because of it. never felt that before on any of my previous F bodys.
That being said I have a few questions.
1. How many miles on the car?
2. Have you checked the fluid?
3. Have you or the previous owner ever changed the tans filter?
4. Last time a tune up was performed on the car?
5. When driving normally does it shift into every gear? Is there a hesitation during those shifts at all?
6. Most stock TB need the bumpstop grounded down some too fully open 100%
Also if you drop the car manually into first it will not shift until you command it to. You also need to shift it a bit before redline doing this or you will hit the limiter and honestly I wouldn't use the trans this way.
I want to say my car idled around 650 when it was bolt ons but I can't remember for sure as it's been a while.
Hmmmm first off next time you post I'd advise you to break up your paragraph as I have done quoting you. It'll make it easier to read and will usually help in getting more results.
That being said I have a few questions.
1. How many miles on the car?
2. Have you checked the fluid?
3. Have you or the previous owner ever changed the tans filter?
4. Last time a tune up was performed on the car?
5. When driving normally does it shift into every gear? Is there a hesitation during those shifts at all?
6. Most stock TB need the bumpstop grounded down some too fully open 100%
Also if you drop the car manually into first it will not shift until you command it to. You also need to shift it a bit before redline doing this or you will hit the limiter and honestly I wouldn't use the trans this way.
I want to say my car idled around 650 when it was bolt ons but I can't remember for sure as it's been a while.
That being said I have a few questions.
1. How many miles on the car?
2. Have you checked the fluid?
3. Have you or the previous owner ever changed the tans filter?
4. Last time a tune up was performed on the car?
5. When driving normally does it shift into every gear? Is there a hesitation during those shifts at all?
6. Most stock TB need the bumpstop grounded down some too fully open 100%
Also if you drop the car manually into first it will not shift until you command it to. You also need to shift it a bit before redline doing this or you will hit the limiter and honestly I wouldn't use the trans this way.
I want to say my car idled around 650 when it was bolt ons but I can't remember for sure as it's been a while.
2. havent checked tranny fluid
3. previous owner probably never changed filter, she was very naive. ive never changed it either only had the car 3 days
4. dont know last tune up. plugs and wires appear new. i did an oil change tonight.
5. driving normally it does shift normally, though downshift is rough in low speeds.
6. i dont fully understand the bumpstop mod or its importance. but ive had 3 previous f bodys, all autos and when floored i knwo what their stock acceleration felt like and this car does not do that
as far as the shifting manually goes yes, i am aware that when you shift it manually you have to manually rack through the gears lol. what im saying is that when dropped manually into first, going to WOT (which doesnt feel at all like a first gear WOT) i shift it manually usually right before redline and nothing, car will not shift. ill go to second, wont shift, 3rd is the same, only shifting up to OD shifts it at WOT. i dont prefer to do this at all since the computer shifts faster than you do anyway. but what im saying is the only way i can get a proper downshift is to be cruising at 60 and drop it down to 2nd manually to get a good pull.
Edit: "Tree'ed" on my reply timeframe.
Did you buy it from a dealer, or from the actual previous owner?
Would it shift better or different, if you didn't go full WOT?
Say try to get 75-90%?
Just curious if it's a WOT trigger in the program that is doing something odd/different/incorrectly.
Check constant fuel pressure when under load/rpm?
If there is a fuel pressure/flow problem, won't the trans/program do something to the shifts cycles? (Curious, I don't know, ...)
What happens at 80% throttle & manually shifting around 5K?
Does it or will it perform any better?
(Just trying to mimic some different habits, to try to help diagnose where some issue may be coming from the tuning.)
Any knowledge of previous modifications that you were not told of?!?
Can you put it in second & see if the transmission does select a 2nd gear start from a stop.
At any time, if the gear selector is in 2nd gear position, the car should start out in 2nd gear, not 1st, not 3rd, not OD.
I don't have your answer, ..., But am curious, ...
What's the car number, & have you sent a request to update the owners registry?
http://www.firehawkowners.com/year/2000.html
Did you buy it from a dealer, or from the actual previous owner?
Would it shift better or different, if you didn't go full WOT?
Say try to get 75-90%?
Just curious if it's a WOT trigger in the program that is doing something odd/different/incorrectly.
Check constant fuel pressure when under load/rpm?
If there is a fuel pressure/flow problem, won't the trans/program do something to the shifts cycles? (Curious, I don't know, ...)
What happens at 80% throttle & manually shifting around 5K?
Does it or will it perform any better?
(Just trying to mimic some different habits, to try to help diagnose where some issue may be coming from the tuning.)
Any knowledge of previous modifications that you were not told of?!?
Can you put it in second & see if the transmission does select a 2nd gear start from a stop.
At any time, if the gear selector is in 2nd gear position, the car should start out in 2nd gear, not 1st, not 3rd, not OD.
I don't have your answer, ..., But am curious, ...
What's the car number, & have you sent a request to update the owners registry?
http://www.firehawkowners.com/year/2000.html
figured it out, the cable needed to be adjusted, with how it came to me the TPS was only registering 80% throttle at WOT. now it reads 100% and the car reacts as it should
That's what I was going to suggest because you said there was a gap between the throttle cam and the bumpstop with the pedal depressed. You were never getting WOT. Glad you got it figured out.