B4Runner

I know there are other threads out there about this and I've read up a lot on the subject. I've even already plugged the vacuum on mine.

Here on YT, all opinions except for one about this by-pass say it is beneficial in two ways; more highway power and up to 5mpg gain.

I've been doing more research just to get a more broad view about this on other vehicles. Apparently, this guy thinks/knows that plugging the EGR vacuum only has negative effects on fuel ecomony on power.


So, we have...

• YotaTech: More power, +5mpg
• Ford Muscle: Less power. -5mpg

Is this the type of thing where both sites are right? By-passing the EGR is benefitial to a Toyota, detrimental to a Ford, and whatever to whatever other vehicle?

What do you guys think?

myyota

A lot of people here have done it and have had good results. The best thing to do it bypass it and see what you notice your self, you may gain a little more power or a little better gas mileage. results very from one vehicle to another.

Blue_petersen77

I don't know about other vehicle makes and models, but since I did mine and experienced the gains I've been thinking about doing it to my 96 Grand Prix to see if I get any gains on that car.

milehigheric

Gains? Bahaha...I just put seat covers in to, got another 10Kw out of her.

Blue_petersen77

Sweet! I was thinking about spray painting my muffler so I don't have to change my oil as often ..... Sound logic you've got there!

RBX

Fwiw I have been getting 21mpg all around driving last I calculated in my 87 4Ruster. Bought it used with 110k on the clock. Just pulled the valve cover to find the egr vac hose under the valve unplugged. I didn't know this before and she was running like a top.
But yeah, I don't know if this egr delete is good or bad. I wi probably remove mine and check the resualts after I have the timig chain back in.

RB

milehigheric

God I really thought this topic has been covered enough that everyone should have stumbled accross at least one of the topics and got the picture....Lets make it clear -

EGR is vacum modulated...it is only on (valve open) in cruise. At open throttle it is 'off', the same scenario as removing it. I really want someone to explain how you can get a performance gain out of it. Sure if the valve is stuck open and you remove it you will see a gain (if you can tell) but only back to what it would be like with a working EGR anyway.

Fuel economy wise, more metered air in the system the more fuel is added. When EGR is open it is essentially recycling already metered air in the form of exhaust. The simple fact is that the cylinder does not need more fuel because there is not as much metered air in there, not much less but enough for arguments sake. A truck without EGR will draw more fuel as the cylinder suck more metered air through the flapper. For this reason a truck with properly working EGR should have better fuel mileage than one without.

EGR also helps keep cylinder temps down...I havnt seen any real world examples, but the theory is solid - it may reduce engine life without it.

smarvin

Mine was not working so i removed the whole thing. I noticed better gas mileage and it seems more power