Is there a fix out there for the 2500rpm tps hiccup?
#1
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2015 Jeep Grand Cherokee, 2005 E55
Is there a fix out there for the 2500rpm tps hiccup?
My last resort is data logging on a dyno and sending it to EC to see what they can do, but I wanted to see if anyone from EC or with a EC tune has fixed this.
My buddy's e55 does the exact same thing. It bucks when rolling into throttle at low rpms.
My buddy's e55 does the exact same thing. It bucks when rolling into throttle at low rpms.
#2
Yes a fsp will fix that. Outside of that, no.
It sounds like the supercharger clutch engaging
It sounds like the supercharger clutch engaging
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2003 W211 E55, 2003 W220 S600
Most think that it is the sc engaging which is not the case. If you have a boost gauge the car will still be in vacuum when this happens and if you log the tps you will see it open to 97 percent and close back when the hiccup occurs.
#4
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So how do you fix this?? Mine has been doing it more and more, recently...
#5
Interesting Shardul, did not know that. I however, never had that problem when I had the fsp. That being said, its back with my 77mm clutched pulley though not as severe or as often as with the 84mm or stock supercharger pulleys
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#10
Just data logged a number of gentle starts from standstill (which is when these violent jerks consistently occur on my car) using dash command and the numbers corroborate throttle position suddenly opening from 6-7% to 96+% momentarily around 2K RPMs.
I have always dismissed this as SC engagement but after seeing the evidence I will definitely be requesting EC to fix the tune.
I have always dismissed this as SC engagement but after seeing the evidence I will definitely be requesting EC to fix the tune.
#11
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With my car the so-called "hiccup" issue would manifest regularly - like every time I drove the car. Last year, Jerry helped dial-in the tune on my car and in the process appears to have all but eliminated the issue. It has since then manifested only once and that was about 6 months ago.
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2015 Jeep Grand Cherokee, 2005 E55
Which obd2 reader did you use to link up to the dash command? Im looking at buying it. Is that the easiest way to data log?
Just data logged a number of gentle starts from standstill (which is when these violent jerks consistently occur on my car) using dash command and the numbers corroborate throttle position suddenly opening from 6-7% to 96+% momentarily around 2K RPMs.
I have always dismissed this as SC engagement but after seeing the evidence I will definitely be requesting EC to fix the tune.
I have always dismissed this as SC engagement but after seeing the evidence I will definitely be requesting EC to fix the tune.
#13
A wireless OBD reader coupled with Dash Command for Android or iOS was the simplest solution and interface, otherwise you could connect with a laptop but try using that while driving
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2003 W211 E55, 2003 W220 S600
Just data logged a number of gentle starts from standstill (which is when these violent jerks consistently occur on my car) using dash command and the numbers corroborate throttle position suddenly opening from 6-7% to 96+% momentarily around 2K RPMs.
I have always dismissed this as SC engagement but after seeing the evidence I will definitely be requesting EC to fix the tune.
I have always dismissed this as SC engagement but after seeing the evidence I will definitely be requesting EC to fix the tune.
#15
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Shardul is correct and the afrs will spike tremendously and I suspect that this issue that some have had may have contributed to the motor popping since the driver unsuspecting accelerated and went very lean and popped. Sometimes it may just shake at idle like a misfire after it does it and if you are monitoring the afrs you would see they are very lean until key is cycled then it goes back to normal. Only happens to a very small percentage of cars especially when they go bigger tb
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How are we sure this isn't at least a consequence of SC clutch engagement? If the throttle closes (as it appears to do, reading TPS), a boost gauge would read vac...even if the magnet is engaged. Wonder if the boost bypass is somehow involved.
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2015 Jeep Grand Cherokee, 2005 E55
mine is pretty violent when it happens. Almost like i tapped the brakes. The sound doesn't make it any better as well. Frankly its so embarrassing that when people are in my car ill do whatever I can to avoid that rpm range
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This place is a joke.
My car does this too...a severe "bucking" at part throttle...usually I have to let off the gas then get back in it...It's been going on for a long time, but getting tired of it lately. Maybe I'll contact Jerry @ Eurocharged to see if he has any updated tune. Has anyone else contacted them about this?
#22
My car does this too...a severe "bucking" at part throttle...usually I have to let off the gas then get back in it...It's been going on for a long time, but getting tired of it lately. Maybe I'll contact Jerry @ Eurocharged to see if he has any updated tune. Has anyone else contacted them about this?
#24
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Most of all of us had this issue or still have this issue with the bigger TB. The tune fixed mine a bit but still there at times, I gave up on it and just live with it. But soon will get retuned and hopefully address the issue..