1 Attachment(s)
9-5 2008 terrible mileage; rough idle; hesitation on hard acceleration
Heeeeeeeeeeyyy everybody! Thanks for taking the time to read my post.
-My 2008 9-5 has been getting terrible mileage (as in half a tank for 60 miles).
-I have refilled my radiator coolant twice in one month, though I see no signs of leaking.
-It takes about 3 seconds of turning the key to start the engine, and has had this characteristic since I bought it about a year ago.
-It idles rough, with a "purring" vibration. By that I mean the amplitude and frequency of the vibration seem to ebb and crescendo together, like a cat's purring. Once I get to highway speeds the vibration goes away.
-If I slam the accelerator the engine hesitates, almost dies for two-three seconds, then responds with acceleration and misfiring.
-My OBD II reader registers a p1181 code.
-And last but not least, once the fuel level gets below 1/4 of a tank the level indication isn't trustworthy. It will stay on 1/4 of a tank for a while then drop to almost empty. Some times if I turn the car off and back on the level will increase. Two weeks ago I ran out of gas on the road, causing the car to die, but the level wasn't yet on empty.
So these are my symptoms, and I have noticed some additional clues.
-I don't see any leakage around any of the block gaskets, but two of the fuel injectors have tar build up/goop at their entry points into the block that smell like gas (the other two are clean).
-I don't see any kind of smoke out the tail pipe, and I don't see bubbles in the radiator fluid.
-I tried doing a smoke test and a propane torch test to check for vacuum leaks and didn't find any.
At first I was worried I might have a head gasket leak but using bar's leak gasket repair didn't improve anything. I am worried my fuel pump might be bad, but I'll have to spend 1500 to have the tank dropped to inspect it (thanks GM). I am wondering if my fuel injectors are leaking, and since both fouled injector sites are on the same side of the engine, if that is causing my vibration? Any help would be great. Oh, and is there supposed to be a hose coming out the back of my oil dipstick tube? I don't have one, just a naked nozzle.
Attachment 17097
are 2008 9-5's supposed to have a hose here?