2.7 severely under powered... Anyone have this problem?

I'm trying to help my dad out with his 03 tacoma 2.7. He recently had the egr line blow off so he fixed that but now the truck seems like it's only running on 2 cylinders. With your pedal to the floorboards it can barely get passed 30mph. Im going to check spark this weekend but is there anything else you guys recommend looking at? Not getting any cels either. Im puzzled.


Thanks in advance

 

Does the truck have a rough idel or fluctuate rpms when ur ideling. If it does you can not be getting the right mixture. Air fuel wise.

 

That can be a cause loss of power.

 

High mileage? Venturing a guess here.
Did the EGR blow off the exhaust manifold? If so it could be a clogged catalytic converter. Backpressure would've caused the EGR line to blow off. It was able to evacuate exhaust with the egr line off. Now that it's fixed it can't push out exhaust gases.
Although I think a clogged cat might have thrown a code before completely clogging up.

 

Hey.... I was also thinking that it could be a clogged Catalytic converter.

 

Disconnect the cat. It will be loud but then you can road test it.

 

Would it be worthwhile to conduct an exhaust backpressure test?

http://www.aa1car.com/library/exhaust_backpressure.htm

 

Vacuum gauge will tell you all you need to know.

 

It idles just fine

It has about 110k on it. I was also thinking a clogged cat. It did blow off the manifold. Would it hurt to disco the egr line again and run it for a bit to see if that was the cause? He said it started acting like this after he fixed the hose. It also smells like gas after you get done driving it which also makes me think its the cat. You are right though... I would think it would throw a code as well.

 

Agreed, but for clarity, disconnect at the front side, not the back.

IE create the exhaust leak before the cat.

If you can tap the cat with a hammer or such, and you hear rattling, that's another indicator of failure.

 

thanks. I will give this a try.

 

welp... checked everything out... it was all good but on my way back from the garage... the truck didn't want to shift (auto).... then after a small hill, the transmission completely went out... I think I know what the issue was... lol and it makes sense because while I was looking at it, the engine revved fine and idled perfect... it just wasnt transferring the power to the wheels.

 

I dont have that problem I have a 2.4L I feel like I should be getting better gas mileage that I am Anyone have this issue?

 

What you 'feel like' doesn't matter. What's actually happening does.

How does what you actually get match up to EPA estimates at www.fueleconomy.gov? They are pretty accurate for an unmodified, normally driven vehicle.

What is the condition of the truck and what modifications? Where do you live? All things that can affect MPG.

If you are close to the EPA numbers, maybe you have the wrong vehicle if you are MPG concerned.

 

Try starting your own thread. With at least some information.

 

On the original topic. Did you check the fluid? Is it black? It's unusual for a A340 to die that early a death.

 

Yeah I checked the fluid. It was 2.5 qrts low (took that much to get it back up to the line on the dipstick. It wasn't dirty or anything. I know it had a service done that included drain and refill the transmission before my dad bought the truck.

 

Does it run and drive now? Or did running it low on fluid toast the trans? Usually the autos in Toyotas are pretty resilient. I know I had a bad leak on a A43D and ran it so low on fluid that it quit pulling. Put 2 quarts in it and drove it home. Fixed the leak and it was still shifting good when I sold it a year later.

 

Better idea, read on one of the other 10k mpg threads instead of starting a 10k01.

 

I just talked to him today and he said he got it back up and running again. he had to add a little bit more to the transmission and also said his catalytic converter was completely plugged up. I am pretty impressed it didn't completely damage it!