What does it feel like?

At like... 40% throttle in the low-mid rpm range it feels like my car loses pull, then gains it back, losses it again, then takes off...

Suggestions?

 

why are you testing 40%? Just mash that **** man.

But really it might be because your car doesn't know whether you want to accelerate slowly or fast. Sometimes mine does that when I press it a little to hard it will jump up like im at WOT but really im not.

your using 91+ octane right?

 

its your car pulling timing so you wont get any knock. dont worry about it

 

using 93 all day..

lol its when i daily drive it, i dont like to floor it ALL the time.. lol...

 

yeah mine did that sometimes...then i got the ngk one step colder plugs and was fine hasnt done it since...Knock on wood!@

 

ahhh okay... makes sense...

I wasnt sure if that was actually knock or not...

 

lol no. you actually hear knock. it sounds like someone knocking on something obviously. lol

 

lol.. hmm... i wondered if thats why they called it that..

Didnt feel like getting flammed if i was wrong.. lol

 

if you feel the car pull timing you need:

Better gas
Better tune
better spark plugs or gap
Cooling mods

Could be any of that.

 

thanks.. i just did the hattrick stu thing... hasnt done it really since then now that i think about it...

Gonna do the h/e later... still deciding between 250 for small one, or like 200 for the big one + more pita install...

I got the autolites about 2 monthes ago... i didnt change the gap... should i?

Its not the stage2 tune... it is but tweaked for a 2.8 pulley and such... anything else?

 

You're kidding right? If it comes to that point your motor is just at the point of blowing! SOMETIMES it can be heard in old carbed engines, but i'd like to see you listen for knock in these cars.

Also, to the original poster, invest in a scan gauge....I think whoever tuned your car didn't do a good job in tuning part throttle

 

that would be me..

lol at the knock thing, haha... i guess i just kinda gotta meet that in the middle..

Aeroforce is bad ass.. + i want digital boost gauge... Will that show just knock or pulled timing as well?

 

your injectors still hate you. im betting your injectors are way over 100%.
you need more fuel and more cooling

 

It will show knock retard, which is how many degrees of timing the pcm is pulling in order to get rid of the knock...so yes haha

If you're going off hptuners scan tool for injector duty cycle, it's off and not as accurate as you'd think it would be

 

not necessarily. i had a batch of bad gas and i could hear the car knocking like hell. thanks god i only put 5 bucks in. filled up with different gas and knock was gone in like 2 miles of driving

 

i heard you look at the pulse width not as much idc # from hp tuners...

alright i think i need to invest in something like the aeroforce...

Ill get 60s when i do the harrop or turbo...

thanks memphis for the help!

 

I beg to differ

 

btw... seriously? Ive never really heard that before..

 

whatever floats your boat buddy

 

Lets keep this going i like answers dammit... clear ones!...

 

i cant reply fast enough... jt's...

 

NP man..the gauge is amazing. You can read two parameters at once. It's a pretty sweet gauge. Besides a lot of import tuners always ask me what kind of gauge that is and when I tell them what it does they are amazed since I don't think they have a guage out there for them like that

 

Hmm.. theres an SS version isnt there?

 

I have the ss version...SS comes up on the startup screen...I heard they got rid of it but then I also heard there's an option in the gauge menu to turn it on...I don't know, i'd email aeroforce to clear that one up

 

My car does the same thing sometimes. Im 1 step colder plugs, cobra h/e, 93 octane. Im guessing its the GM stage 2 tune with the 2.9 pulley causing the small issue.