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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHSprint booster on my 996 mk2 tip
Reported or suspected cause
potentiometer or an encoder) and connects
Suggestion or failed attempt
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that suspect a cause
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Suspected cause
Not sure if you have figured it out yet, I just had a look of my car, the semi-regid cable you see in your picture is a mechanical cable in a sleeve to transfer the throttle pedal motion upwards to the electroic sensor (likely a potentiometer or an encoder) and connects to the electronic sensor.
Leading evidence: 'potentiometer or an encoder) and connects' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'potentiometer or an encoder) and connects' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Reconnect throttle wire' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
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Suggestion
Unclip the throttle connection, clip in the sprint booster, reconnect the throttle wire.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
I have heard from a local owner that he only uses the high setting on the track and uses the medium setting in day-to-day traffic.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
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Suggestion
I have heard from a local owner that he only uses the high setting on the track and uses the medium setting in day-to-day traffic.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
potentiometer or an encoder) and connects
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suspected cause
Not sure if you have figured it out yet, I just had a look of my car, the semi-regid cable you see in your picture is a mechanical cable in a sleeve to transfer the throttle pedal motion upwards to the electroic sensor (likely a potentiometer or an encoder) and connects to the electronic sensor.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
35 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T005001Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Yes I was one of those skeptics that wondered what is the point of the sprint booster when you can just mash the throttle faster and harder
In my opinion it has totally woken my car up and makes her much more tractable - it allows instant throttle blip downshifts and just makes the car much more fun to drive
Passing and on ramp merges are easier and around town the car is easier to drive with no lugging
I have found I just leave in the highest setting
I purchase from gmp performance - its was $300 vs $329 elsewhere
Installation was about 20 mins
I've been thinking of adding this to my 2000 Cab for a while now. I would love to hear your more in depth thoughts on the before/after experiences. Many thanks in advance!
I've been one of those skeptics for a while but the absurdly lazy throttle response on my '99 C4 is getting tiresome. It seems kind of pricey for what you get but it solves the only problem I have with this car.
If I'm not mistaken, your 99 does not have the egas but has a proper cable throttle. With that system, you shouldn't be experiencing the type of throttle lag that we're talking about. Either that, or our throttle response must be really...really slow by comparison!
I'm not sure how much more in-depth, I can be. Install was super easy. 10 - 15 minutes upside down with a flashlight in my mouth. Unclip the throttle connection, clip in the sprint booster, reconnect the throttle wire.
I'm not sure how big a deal the 'off', 'green', 'yellow', and 'red' adjustable light thing is. It took me a day to move from green, to yellow, and then to red. Mine has been on red since then. It basically takes the 'just off-throttle' dead spot out of the equation. I've read that the EPA mandated off throttle dead spots. Maybe an old wives tale?
I've chipped a bunch of past cars and from the seat of the pants, this feels the same. I'm sure there are many on this site who are far more technical than I am, who know the real technical difference between Sprint booster and a true ECU flash. I've been super happy with the Sprint Booster.
Thanks for the correction on all C4's being Egas Doug. Thanks as well Aaron for the extra input. I think I'm going to pull the trigger on a SprintBooster and give it a try. I will report back my experience for those considering it as well.
Are there any competitors to this product. Hate the lag, but $300 is $300. Just wondering if there alternatives that work as well. Has the performance improvement held up for everyone?
Ted
I liked mine,until it left me stranded on the top of a freeway bridge in rush hour. I had to crawl under dash in traffic and remove it,then the car drove home fine. Sprint booster did offer to sell me another one. I was under dash with door open leg sticking out terrified. Always carry road flares.
One of the best mods I've done to my car as far as driveability is concerned. I must have the first generation product as I don't believe mine is adjustable.
I have always wondered how the sprint booster "boosts" the signal as I am convinced that it must be a very simple circuit inside that little box...maybe something that one could make without dishing out $300 could do the exact same thing?..any thoughts?
OK, My Sprint Booster arrived yesterday. I can't for the life of me figure out how to install this thing. I am not very mechanical, but the "wire" just looks like it goes inside of my accelerator - all of the youtube videos look like there is a plug on the accelerator and this goes between the plug and the wire - does the accelerator come apart some how?
Thanks!
Ted
What year is your car? If it's 1999 or earlier then it is NOT electronic throttle, ie it woul be mechanical throttle and the electronic Sprintbooster won't work.
OP,
Not sure if you have figured it out yet, I just had a look of my car, the semi-regid cable you see in your picture is a mechanical cable in a sleeve to transfer the throttle pedal motion upwards to the electroic sensor (likely a potentiometer or an encoder) and connects to the electronic sensor.
Follow the mechanical cable through a half-loop path and you will see it ends beside a black flat connector with 6 wires on it, that is where you need to disconnect and put the Sprint Booser in.
This is certainly not the easiest thing to do as you would almost have to lie on your back into the front footwell to see and work on this connector, get a limber youngster and give him $20 to do this if you don't feel like bending and contorting like a pretzel, it will be well worth it.
all c4 are drive by wire.... follow the wire, it will lead you to a connector, plug the sprint booster between the connection.
I shut my booster off in traffic... not useable IMHO. Other than that its great on the track.
I was curious about this aspect, do you have the newer unit that has selectable off/medium/high
settings? If so how is the medium setting like? I have heard from a local owner that he only uses the high setting on the track and uses the medium setting in day-to-day traffic.
Can you turn it off conveniently in the cabin? I had never heard of of a Sprint Booster till I read this thread
sounds like a great mod for the money!!
The new ones have a momentary push button on a pig-tail harness so you can press to cycle through the 3 settings of off, medium, and race modes, an indicator light will show off, green (mid), and red (full) modes.
See
http://www.sprintboostersales.com/de...era&engine=Gas
, it's a good mod, just seems a little over-priced........
The effect should be very similar, there is a local fellow who reported he just had the "sprint booster" programmed in his ECU tune.
The only advantage I can see with the hardware Sprint Booster is that you can take it out and sell it to someone else when you sell your car, kind of like the SmartTop and RemoteTop modules, which in IMHO are much more sophisticated yet cost somewhat less than the simpler Sprint Booster.
^^Yep that was me. Both custom ECU flash and sprint booster in the tune. The hardware one is know to fail occasionally, it makes more sense to do it at the source (ie ECU), but is obviously a bit more expensive.
yeah, low, medium is fine day to day.... off in traffic. High spirited runs and the track set to high. I have the newer ones I got from a group buy on 6speed.
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