I've had 93 in my car for 7 months.

 

And my car is having a terrible rpm issue. The rpms bounce up and down really bad during shifts and I can hear it in my exhaust. My gas mileage drops a little every day. And I'm thinking my tune could be causing this.

 

I was gonna say bad gas, lol.
Yeah, you should get your tune looked at.

 

I wonder how much more timing it would take on E85 compared to 93. Someone NA should test this

 

I ran 93 when NA for over 3 years with no issues. Your problems are elsewhere. Check the throttle body, change fuel filter, etc. Or like mentioned before get the tune relooked at. Any codes?

 

That's what I'm doing right now

 

Something I've learned about this car is that an issue is normally the result of something really really stupid

 

I didn't do nothing

 

Don't get gas from grocerie stores...

 

Mobil and Shell is all that goes into my car.

 

Texaco and chevron in mine. Its all about that techron

 

Don't have to.. Fuel Injectors can fail, Coil packs can fail. I'm just saying that the root of your issue is probably something failing

 

I changed my plugs and coils like last month. Well apparently my car is slipping in 4th gear and the tune had nothing to do with it. I'm going to try to change my transmition fluid and filter and see if that fixes it if not its time for a new tranny

 

How many miles on the current fluid? That sucks to hear :/ I've had issues in the past with my 4t45 but it was tune related.

 

hey mindrot what type of power are you making? and do you have any internals built up or whatever? im thinking of trying e85 after I get a badmab header but i hear the 06s cant really take much idk lol

 

I don't think the fluid has been changed honestly. I got the car with 63k and I've had since jan 2010 and now it's about to hit 90k. I haven't changed it. And The place we got it from didn't say if it's been changed. The only way to know is to check the fluid. But we couldn't find the dip stick.

 

There isn't a dip stick. There is a plug you can take out near the passenger side of the trans. It's probably low on fluid so I doubt you'll be able to check. When I did mine at 100k (50k intervals) i didnt bother checking. Just drained it and filled her back up. I change it every 50k due to the traffic abuse my car goes through.

 

High 200's.. I need to dyno it to know exactly what I'm at. Motor is bone stock. These motors can handle power if they have been taken care of. I keep up with fluid changes and don't beat the living **** out of it. 117k miles and going strong.

 

Ya I'm changing the fluid this weekend. And trust me I don't drive it hard. It's my baby

 

what exactly is driving hard? like stepping on it once in a while or like always stepping on it. I try n do grandma driving whenever I can and only really step on it once in a while when I wanna hear the whine

 

Driving it like u stole it pretty much.

 

should be good then...im thinking of doing it. if it blows up imma take out the sc kit and switch my car with yours overnight

 

A good solid tune makes a big difference in the long run as well!

 

Haha ya right. Our cars look completely different

 

1 lip...lol ill just take your engine then and replace it with mine lol