thahof

Hey guys, my rx7 has no power whatsoever. If I go up a hill I will almost stall. Even in first gear. Was told it was vacuum leak at manifold. Replaced the intake manifold gasket and mass air flow still doing the same thing.

Thanks in advance!

greyseason

Maybe a clogged intake manifold? I remember reading where a older lady drove the car, never abused it, and when the new owner was going through the gears, he got an instant boost of power ( like a turbo coming on) and someone said it was probably a clogged runner

thahof

I'm the 4th owner it has 157000 original miles. I will check that out tomorrow when I'm not working. But makes sense. Thanks man

thahof

Also I have very low oil pressure constantly like the gauge says around 15 lbs/in don't know about rotories but that's very low for internal combustion

lduley

iTrader: (1)

The stock gauges are inaccurate, even moreso after 20+ years. Hook up an aftermarket to be sure on the oil pressure

RXSpeed16

iTrader: (41)

Check spark plug wires are going to the right plugs.
Check your spark plugs.
Check your timing.
While car is idling, spray carb cleaner on any joints in the intake piping, under the manifold, anywhere you suspect a leak and listen for a change.
Clogged cats are also a possibility.

thahof

Thanks guys I will check all that tomorrow and get back with you!

10thaniv

iTrader: (1)

I had an issue like this, it ended up being a dirty fuel filter. Just my 2 cents.

thahof

I will check it. Previous owner said pump, lines, filter were all new but I guess I can't go off what she says haha

thahof

Is the cat supposed to be mid pipe? Because I just have a piece of pipe in it's place where someone has cut and welded. Also spark plugs look fine how would I check timing on this beast?

thahof

Also I just unbolted from the manifold that piece of clean pipe is what I was talking about

misterstyx69

iTrader: (142)

That pipe is where someone deleted the Main cataltyic converter but left the small split air pipe on so that you would not lose your aux port activation...but who knows if the split air pipe is actually doing it's job unless you know if the Aux ports are actually opening up.
Look up Port actuators on an S4 and you should be able to sift through info on how to check them.

thahof

Also what is this piece it has honeycomb inside it and not sure if I should clean it out

misterstyx69

iTrader: (142)

look at the stock configuration for the s4 N/a exhaust system.It has a couple of Cats.One being a pre-cat and then you have the main cat that has that split air tube attached to it.
Hopefully this shows up so you can see it.
LINK:https://www.rockauto.com/catalog/mor...329&cc=1192317

thahof

Thanks for the help