[Glowin]

Today I was driving and a couple of times in first gear, and in second gear, the car as I was accelerating gently started bucking, like the throttle was oscillating. Very jerky.

First of all, it got me thinking if it could be the stupid fuel pump? I've had no long cranks at all til now, and in fact, even had the pump replaced a year ago, which was only 5,000 miles ago (yes, I don't drive much!)

And if the car does throw a fuel pump code, would CANClear clear that too? I'd obviously want to see it when I scan my car next...

[zsapphire7]

6MT ? AT? what map?

[Glowin]

I assume you're asking for the jerky acceleration question I had. How does the transmission affect the jerkiness? It wasn't during a shift I felt it. It was while I was accelerating in first, or in second. Nonetheless, I've got a 6 MT. It's a stock car, running the Procede with map one of the 5-15 maps. All settings as default.

So you think that's related to the Procede possibly or the HP fuel pump?

As far as the codes are concerned, I'm guessing / hoping the fuel pump codes are left behind, but I thought that since they can sometimes be related to running a tune, they might be getting deleted too by CANClear.

For example, the code 2AAF / 10927, which stands for "Fuel Pump Plausibility" and is described by Shiv as "Often triggered when running a tune", was one I was worried might be getting cleared by the Procede automatically.

[Vudoo4u2]

I would bet (and this isnt a shot at your driving, just a try at helping) that when you were accelerating, you werent doing it in a smooth motion with your foot, and in the instances where you ease off and back on, due to the linearity of the boost w/the procede youre getting a "bucking" feeling because the car is part throttle boosting, then adjusting boost down a few psi and up a few psi back and forth.

does your problem occur when you are WOT from a roll?


and canclear doesnt delete fuel pump codes

[Glowin]

Originally Posted by Vudoo4u2

I would bet (and this isnt a shot at your driving, just a try at helping) that when you were accelerating, you werent doing it in a smooth motion with your foot, and in the instances where you ease off and back on, due to the linearity of the boost w/the procede youre getting a "bucking" feeling because the car is part throttle boosting, then adjusting boost down a few psi and up a few psi back and forth.

does your problem occur when you are WOT from a roll?


and canclear doesnt delete fuel pump codes

I suppose anything's possible, but that's definitely not it. It's happened to me a few times, and I wasn't oscillating my foot for sure. I was accelerating smoothly. I've been driving with the Procede for months now, and this is the first few times (all in the last two days), so I don't think all of a sudden, a couple of accelerations weren't smooth.

I've not tried WOT from a start, but don't think that'll exclude anything, since this is only happened a few times so far.

So do you know if this is one of the early signs of a fuel pump going (besides the long cold cranking, which I've not had), or not? Any other ideas?

[supracg]

I would like to no the answer as well, this has happened to me a couple times as well the past few days, stock with PROcede. During slow accel in 3rd or 4th it'll buck sometimes, Im hoping it's not my fuel pump dying on me I haven't had any significantly long cranks. Other than that the car runs great though.

[AltecBX]

Like I recommended in other tread, I would try an older map to see if you get a code.

[Glowin]

Originally Posted by AltecBX

Like I recommended in other tread, I would try an older map to see if you get a code.

So I just scanned the car, and there was no code there other than the exhaust flap one.

Which older map are you talking about? The official one before this was the 2-23 maps, right? All the others after it were sent to beta testers.

With respect to your post that CANClear has been working for the last 18 months, there is no way that can be true or that it has been working well for everyone. I've personally had various tuner codes for sure, including the 11566 one that Shiv had said at first months ago he fixed with the 2-23 maps, yet I was still getting it, and then when I posted about it last week, he confirmed it wasn't totally fixed all this time... http://www.e90post.com/forums/showthread.php?t=389637

As recently as a month ago on the 2-23 maps, I was still getting the 11544 code (Manipulation protection, air mass signal plausibility), as well as the 11557 code, (Mass Air Flow Excessive - External Tuning Box Detected), and I had the 10927 code about 9 months ago (Fuel Pump Plausibility one), all of which are tune giveaways.

[AltecBX]

Exactly, your op asks if CANclear is clearing the fuel pump code. Well if 2-23 maps was throwing that code (10927) and you are worried about CANclear clearing that code now with 5-15, revert back to 2-23 to see if you throw that code.

How are you scanning for codes?

[Glowin]

Originally Posted by AltecBX

Exactly, your op asks if CANclear is clearing the fuel pump code. Well if 2-23 maps was throwing that code (10927) and you are worried about CANclear clearing that code now with 5-15, revert back to 2-23 to see if you throw that code.

How are you scanning for codes?

I'm just scanning via the Procede.

I don't see how your reply though answers my question about whether CANclear clears various fuel pump codes or not. It sounds like you're suggesting a method to do testing to figure that out, which I'm not sure even would be reliable, since I don't know if I'm getting the code right now, so if I switch back to 2-23 and still don't get the code, not sure what I've managed to prove.

[Sparky66]

You guys realise that you can disable CANclear by changing the o2 Modifier setting to 0?? .....even in the current 5-15 maps.
Entering a 0 will turn off the o2sim, so if you are catless, you will trigger the Oxygen sensor codes and o2 readiness.
If you are not catless DP setup, leave CANclear off for a couple of days and see if in fact your Procede's CANClear was clearing any fuel pump codes.

[Glowin]

Again, I'm not asking anyone here how to turn CANclear off. That's in the instructions.

I'm asking

1) if it also would delete any fuel pump related codes in general, and
2) if it would delete the 10927 code specifically, if it was to get generated.

Not sure what's unclear here in what I'm asking.

And second issue is whether the jerky acceleration I've gotten a few times is a sign of my HP fuel pump going or what else it could be.

Hope that clarifies it.

[TheTwinz]

damn dude, I have no answer for you but, have you tried emailing Shiv? I'm surprised no one has responded to you yet in regards to this but they have the time to engage in a code clearing argument in another thread.

[AltecBX]

I hear what your sayin but I have not seen an answer to your question yet. It's the reason why I suggested the above. I ask the same question if CANclear clears misfire codes 10705&10796 and they have gone un-answered too. By reverting back to a firmware which you did get the code, you might able to tell if they added the 10927 to clear from the latest firmware. If I'm misunderstanding you then ket me know.

[turboawdfanatic]

Originally Posted by shiv@vishnu

The 10927 is fuel pump plausibility. Ignore it. Many stock and tuned cars alike throw that.

The 11566 is a benign tuner code that we mentioned in the documentation. We will get rid of it soon. Probably before we even implement the auto-clear function.

The other codes I've not even seen before. Worth getting them checked out for sure.

Shiv

this was posted by Shiv here: http://www.e90post.com/forums/showpo...&postcount=120

More 2aaf info here (read posts at the end of the page)
http://www.e90post.com/forums/showth...highlight=2aaf

[Glowin]

Good call to email Shiv. Just did it.

[zsapphire7]

yea... i think shiv is aware of this. I think it happend to me too but im not sure.. only one time since so i thought it could be bumpy roads. Waiting to see if i can get it to happen again

[cn555ic]

its happening to me, but I know for sure its the bumpy road that makes the difference on my foot to the pedal...The throttle is so sensitive that any slight pressure on and off will create this little jerkiness!

[Novator]

I do not mean to threadjack, but out of curiousity now that I am learning the Procede might already make the throttle very sensitive, unless I misunderstood, would running the Procede along with a Sprint Booster only make it worse? I am curious. The reason I ask is because I have heard of people running Dinan S (1-3) tunes along with a Sprint Booster and no issues with jumpiness with the acceleration. I really would like to get both, but if the Procede is better throttle wise and the Sprint Booster would only make things worse, I would forget about the Sprint Booster. But if they can work together in harmony than that would be great too.

[Glowin]

I don't know... maybe it IS the super sensitive throttle... I have to admit, it is a bit too sensitive with these maps for my liking. In the older firmwares, the throttle response, even set at its max of 5 (super , wasn't as sensitive as it is now, which you can't adjust, since that parameter is now being used for aggression... It would be nice if we could have still adjusted that, to see in case I could dial it down a bit and see what happens.

[OpenFlash]

Just got back from vacation. 3700 miles of driving in 7 days. If anyone can capture this hesitation in a catalog, I'll be much appreciative. Also, if you are a 6at, do not run the 6mt map as you WILL have hesitation issues. You will need to run the 6at map. Not sure If that is the issue but it's worth mentioning.

Also, be sure to run the new firmware with the new maps. Mixing and matching may cause issues.

Shiv

[E30M3Driver]

Originally Posted by Glowin

Today I was driving and a couple of times in first gear, and in second gear, the car as I was accelerating gently started bucking, like the throttle was oscillating. Very jerky.

First of all, it got me thinking if it could be the stupid fuel pump? I've had no long cranks at all til now, and in fact, even had the pump replaced a year ago, which was only 5,000 miles ago (yes, I don't drive much!)

And if the car does throw a fuel pump code, would CANClear clear that too? I'd obviously want to see it when I scan my car next...

I've experienced what you describe with regard to the jerky/bucking acceleration with very light throttle in 1st-2nd gears a couple of times now under stock conditions, no codes thrown, no other fuel pump issues and I am still on my original pump. In both cases car was cold and not warmed up.