Sputtering and hesitation when moving

[Avoooo]

Car runs good for the most part except when it gets this annoying sputter and hesitation. It only does this when I’m already moving and start rolling into the throttle and happens in second to 6th gear randomly, not full throttle but at about a quarter to half throttle. It never sputters when I fully punch it only when i slowly get into the throttle and the car will hesitate and sputter until I take my foot off the gas and then it will drive fine. It idles normally from what I can tell and runs very strong when I got WOT. My car has bolt ons, 9.1 lower pulley, arh headers and highflows, rotofab Intake, 850 injectors and a tune. I don’t know what this could be for the life of me and any help would be greatly appreciated. Could it be a dying fuel pump, weak maf? Thanks in advance!

[ZMEnow]

Originally Posted by Avoooo

Car runs good for the most part except when it gets this annoying sputter and hesitation. It only does this when I’m already moving and start rolling into the throttle and happens in second to 6th gear randomly, not full throttle but at about a quarter to half throttle. It never sputters when I fully punch it only when i slowly get into the throttle and the car will hesitate and sputter until I take my foot off the gas and then it will drive fine. It idles normally from what I can tell and runs very strong when I got WOT. My car has bolt ons, 9.1 lower pulley, arh headers and highflows, rotofab Intake, 850 injectors and a tune. I don’t know what this could be for the life of me and any help would be greatly appreciated. Could it be a dying fuel pump, weak maf? Thanks in advance!

Are you running a BAP? Do you have the ability to run some data logs?

[Avoooo]

Originally Posted by ZMEnow

Are you running a BAP? Do you have the ability to run some data logs?

Nope, no BAP as of now but will be camming it in the near future so will be running it forsure. And as for data logging I don’t have any tools to do so and honestly wouldn’t know what I would be looking at regardless lol.

[Can'tHave2MuchHP]

Who tuned it? Take it right back.

[STUNNAH]

Originally Posted by Avoooo

Nope, no BAP as of now but will be camming it in the near future so will be running it forsure. And as for data logging I don’t have any tools to do so and honestly wouldn’t know what I would be looking at regardless lol.

To much pulley and injectors to at least not be running a BAP...Your probably running out of fuel...

[Can'tHave2MuchHP]

Originally Posted by STUNNAH

To much pulley and injectors to at least not be running a BAP...Your probably running out of fuel...

He's got the same supercharger overdrive as you do. (2.55 = 18%, 9.1" = 18%). A Boost-a-Pump (BAP) is not necessary for 18% on a properly functioning fuel pump. ID850s/ID1050s alone will be fine. Also, running out of fuel would not be what he's describing which is mid throttle loss. Running out of fuel would matter when you're revving it out, 5500+ RPM. Then you'll notice immediate power loss. If you were "running out of fuel" at "1/4 to 1/2 throttle" then you could kiss your engine good bye at WOT.

It's either a sensor, the tune, or your fuel pump taking a dump. I'm not a professional tuner, some members on here are and may have other things to check. Your tuner should definitely be able to handle this, he'll be able to datalog, see codes and more.

[ZMEnow]

Originally Posted by Can'tHave2MuchHP

He's got the same supercharger overdrive as you do. (2.55 = 18%, 9.1" = 18%). A Boost-a-Pump (BAP) is not necessary for 18% on a properly functioning fuel pump. ID850s/ID1050s alone will be fine. Also, running out of fuel would not be what he's describing which is mid throttle loss. Running out of fuel would matter when you're revving it out, 5500+ RPM. Then you'll notice immediate power loss. If you were "running out of fuel" at "1/4 to 1/2 throttle" then you could kiss your engine good bye at WOT.

It's either a sensor, the tune, or your fuel pump taking a dump. I'm not a professional tuner, some members on here are and may have other things to check. Your tuner should definitely be able to handle this, he'll be able to datalog, see codes and more.

When I was data-logging my ID850's I saw fuel pressure dropping at around 3500 as I set up my Ramp on my BAP. I just don't know how he can maintain 60 plus pounds without a BAP.

[Avoooo]

Originally Posted by Can'tHave2MuchHP

He's got the same supercharger overdrive as you do. (2.55 = 18%, 9.1" = 18%). A Boost-a-Pump (BAP) is not necessary for 18% on a properly functioning fuel pump. ID850s/ID1050s alone will be fine. Also, running out of fuel would not be what he's describing which is mid throttle loss. Running out of fuel would matter when you're revving it out, 5500+ RPM. Then you'll notice immediate power loss. If you were "running out of fuel" at "1/4 to 1/2 throttle" then you could kiss your engine good bye at WOT.

It's either a sensor, the tune, or your fuel pump taking a dump. I'm not a professional tuner, some members on here are and may have other things to check. Your tuner should definitely be able to handle this, he'll be able to datalog, see codes and more.

The odd thing about it is it doesn’t do it all the time it’s random, on some drives it won’t do it. It’s been doing this for a few months and when I first noticed it I Left it at my mechanic for a couple days and they drove it around and it didn’t do it once. I’m goona call my tuner and see when I can take it up. Thanks for the help my friend.

[Can'tHave2MuchHP]

Originally Posted by ZMEnow

When I was data-logging my ID850's I saw fuel pressure dropping at around 3500 as I set up my Ramp on my BAP. I just don't know how he can maintain 60 plus pounds without a BAP.

Every car is different, but I seriously doubt anyone should need a BAP at only 18% over drive. Was your car a 9.1 or 2.5 pulley?

Originally Posted by Avoooo

The odd thing about it is it doesn’t do it all the time it’s random, on some drives it won’t do it. It’s been doing this for a few months and when I first noticed it I Left it at my mechanic for a couple days and they drove it around and it didn’t do it once. I’m goona call my tuner and see when I can take it up. Thanks for the help my friend.

I think that eliminates the possibility of it being a fuel pump if it's being on and off for a few months. A fuel pump may have fluttered around a few times but it likely would have gone within an hour of you first noticing this issue.

A tune could be the issue, but more than likely this is a computer reading a bad sensor or something. I've not yet handled one of these issues yet so my experience ends here. But you definitely need it data logged, so if you can't do that then get it to a tuner who can.

[JANNETTYRACING]

Most common is plugs cracked or damage, wires not securely connected or damaged, we see this scenario often.

Only skips when high demand is put on the ignition system.

Ted.

[owhite3003]

Originally Posted by JANNETTYRACING

Most common is plugs cracked or damage, wires not securely connected or damaged, we see this scenario often.

Only skips when high demand is put on the ignition system.

Ted.

What Ted said!!!

[KaBoom1701]

Cracked spark plug...

Dont ask how I know this.

[Can'tHave2MuchHP]

Ahhh of course.

[Avoooo]

Originally Posted by JANNETTYRACING

Most common is plugs cracked or damage, wires not securely connected or damaged, we see this scenario often.

Only skips when high demand is put on the ignition system.

Ted.

Thanks Ted,