subaru doesnt excellerate???

NYSpeed Automotive
1

well, im working on a car for my friends father and its having some symptoms that need to be taken care of. first off, its a subaru wagon early 90’s awd. I dont know exact model right now. at first the car would run rough at start up and eventually after a while run right. now it does it all the time.

symptoms: NO CEL. car will not excellerate or it takes about 10-15 sec to stumble up in rpms. if you WOT it will sputter and stall. if you slowly roll into the throttle it will slowly stumble up in rpms like said.

Now, this is all in neutral, and even worse when in drive.

Now i checked to make sure there is spark and its there on all four cylinders and there is no black soot shooting out the tail pipe. So i feel as if its fuel related. second thought was cat converter but somehow doubt that.

2

have you checked the obvious things? Fuel Filter, Bad Fuel, etc?

3

ive only looked at it for about 5min so far. its been happening for a while so im gunna rule out bad gas. however filter/pump/fpr are some things i was gunna look at. I wasnt sure if maybe there was something common with subarus to look into.

4

vac lines?

5

I’d have to lean towards fuel filter especially if it’s never been changed.

6

filter actually looked newer.

7

My scion doesn’t excellerate either?

Sometimes it accelerates though.

8

Fuel injectors??? Sounds like its something to due with the fuel system. Might want to check the electrical system too :gotme:

9

I’d check fuel filter… I’d also look for any vac lines, also… another idea… check the Throttle body’s gasket… hell just buy one and replace it because when you take the TB off… you’ll want a new gasket anyways. My buddy’s VW did this after he cleaned his TB (This was a monthly thing with him… I dont know why he did it… it wasn’t needed) He put it back on and was missing 1/2 a gasket. and it was running like ass…
was getting fuel for air reading from the maf (x) but was also getting air from the leak in the tb… and as simple math woudl tell us… X+Y usually doesn’t = x

10

hmm, well if it had a bad injector it would still rev up faster than itt is now. ALL four cylinders are stumbling to rev up which leads me to believe that its fuel delivery problem. This problem was slowly snowballing into a big problem, so if it was timing/ignition related it would have been instant. not progressive like it is in this situation. Im goin to go over there today and change the fuel filter and maybe throw a guage on the fuel line to see what kinda pressure i have.

11

That’s my problem, I always seem to look at the off-the-wall possibilities instead of what’s right in front of me… :bloated: