Will I need premium fuel after ISR removal?

[vivek]

I'm on spring break and I'm on an agenda hehe. I got my exhaust done Saturday and I plan on doing the intake silencer removal tomorrow. Only one thing is worrying me. I read I might get pinging and might have to run premium fuel. Is there anyway I can do the ISR mod without running premium? Would resetting the EFI fix this? Oh btw I have an 01 limited 4runner.

 

[PitbullRescuer]

No, you don't need premium.

 

[CodyX36]

Where did you hear about running Premium fuel for doing this mod? Are you supercharged?

 

[vivek]

no i'm not supercharged. go all the way to the bottom:

<96 Runner>'s Intake Silencer Removal Mod Installation For '96 – '97 3.4L Engines

Also, Dr. Zhivago's article mentions the same:

Intake Silencer Removal Mod - 3rd Gen 4Runner (2000) - YotaTech Forums

 

[ryan93Integra]

I took out my intake silencers last week. Also drilled a 7" hole in the front of the air box. No problems. Just really really loud around 4000 rpm lol

 

[JayRolla]

This can be true for some cars. Suburu STI with just an exhaust and intake is enough for the car to run lean. The ecu is not good enough to adjust for the added air flow. But ive never heard of an intake causing our trucks to run lean or detonate.

 

[jrm]

Nope no need

Remove the EFI fuse for a couple of seconds and then reinstall it to reset the EGR. I use mid grade with pretty good results.:fro:

 

[PitbullRescuer]

This can be true for some cars. Suburu STI with just an exhaust and intake is enough for the car to run lean. The ecu is not good enough to adjust for the added air flow. But ive never heard of an intake causing our trucks to run lean or detonate.

That makes a lot more sense on a turbo car. (I'd only run premium in a forced induction car anyway though.) But like everyone has said OP, you should be fine.

 

[LDForget]

Remove the EFI fuse for a couple of seconds and then reinstall it to reset the EGR. I use mid grade with pretty good results.:fro:

To reset the EGR? Your truck doesnt have an EGR. Maybe you mean ECU.

 

[vivek]

I see...so regular 87 should still be fine then. Does the ISR really help, or is the majority of the performance gain from the deckplate mod? I read some articles that say that a custom intake pipe doesn't do anything and actually decreases power (think it was a lexus soarer).

 

[Baja Runner]

Octane has no effectiveness with running lean or rich. Higher octane is only to avoid pre ignition during compression. The only cars thst need high octane gas are those with turbochargers, superchargers, and engines that run at a higher compression .

If the ISR made you running lean then you'd have to increase the volume of fuel. Running lean or rich is in relation to the stoichiometric ratio of gas and air (14.7 : 1). This relationship remains constant .