gb42

Hello fellow yotatechers, I have a question regarding MPG and EGR Valve. Some background, I get around 80-90 miles per tank which equates to roughly 6mpg (OUCH), my 4runner has the 3.0l V6, auto trans, and is currently sitting on 33x10.5x15 tires.

Back to the MPG, if I drive the car for a long time in one sitting my gas mileage doubles but if I just drive to work and back each day (1 mile trip each way) I get about 80-90 miles per tank of gas.

At first I thought it was the cold start injector so I disabled that and no noticable improvement was made so yesterday I went to check on the EGR valve and I noticed it is not there.

The weird thing about all of this is that I have no check engine light on, and I had no check engine light on when I unplugged the cold start injector as well. Should I have one on?

I have a replacement fuel filter and o2 sensor that I still need to install but I was wondering if my bad MPG is due to not having an EGR valve?

CLIFFS:
-6mpg if I drive for short periods of time (EG 1 mile trips)
-13-15 mpg if I drive for extended period of time (2-3 hour trips)
-no EGR valve right now
-not cold start injector related (or at least I don't think)

Levinz11

Short trips and winter gas = BAD MILEAGE. 13-15 MPG's isn't too bad. I get about 17 with a 40 mile roundtrip commute.

On a short trip the engine never gets to operating temp, so the computer is sending extra fuel to get cats warmed up, etc.

You have an EGR block off plate???

gb42

So 5-6 mpg for short trips is normal? It seems that it should be better than that. I do not think there is an EGR block off plate, it seems the previous owner just unplugged it and unscrewed it. Should I have a check engine light on?

Levinz11

I have never used a full tank of gas, while never going further than a mile. However, if I had, I would expect terrible mileage. Lots of threads about this and the EGR issue. If the PO removed the EGR I would assume he blocked off the hole in the exhaust manifold with something. I'm not the most knowledgeable guy on these boards so maybe a quick search will get you the info you need.

Good Luck!

gb42

I will snap a couple of pictures when I get off work

SoCal4Running

Compression check!

TNRabbit

Also, have you checked for stored ECU codes? you can have them with no CEL.

gb42

I just checked codes and all I got was constant flashing, pretty sure I did it right, I put the paper clip in the middle of te1 and e1 ports and pushed down between the metal. All I got was constant flashing of the check engine light. 25 miles down and a quarter of a tank gone

TNRabbit

Another thought....do you have a fuel leak from the tank or lines??

Levinz11

From the FSM...(a) Normal System Operation (no malfunction)
• The light will alternately blink ON and OFF at
0.26 seconds intervals.