Hiya folks. I had a problem that started this morning and I'm thinking right now its either the fuel pump or the fuel filter, but before I go rip my gas tank out of my car, I want to see what you guys think.
Firstly, I was nearly out of gas this morning and being stupid lazy about just going and getting a fill up.
I head to work and I immmediately noticed when I got on the highway that acceleration was absolute **** from a start. Once I got into the higher gears, accelleration piced up, the engine sounded normal, et cetera. I figured it was just because I let the tank run too dry. BTW no codes. I was wondering if maybe there was some transmission problems but the Scantool showed everytning working right. The car hit all gears and the TCC is behaving as it should.
When I accelerate, the engine feels seriously bogged down, you can even hear the engine kinda slow a moment before it picks up and the car accelerates like an L27 that hasn't had a tuneup in 300,000 miles.
So anyway, I was noticing my spark plugs looked out of wack (cables reversed, you can see it in my sig pic). So... I tried figuring out proper firing order and enlisted a bit of help from Boost and Pat. That lined up without a problem so I enlisted the wife to watch the scantool. What we found was a spark plug advance of about 25 degrees while idle, but as soon as I hit the gas, it drops to 11 and slowly climbed to about 14 or 15. Thats the most advance I got while moving.
I went to the local Ricerzone and picked up a Fuel Pressure tester. Of course I grabbed a TBI model and it didn't fit. Swear a couple times, then return it for the MFI model. Of course the godamn thing has 3 feet of line so I can't test it while driving, but it was showing me 31 PSI. When I tweak the throttle body, it drops down to 29 PSI and then climbs up to 30. Never more then 31 PSI.
While I was there, I picked up a vacuum line kit because I knew at least one line was bad and I had replaced another recently. So with my wife in the car wanting to eat dinner, I replaced the soft vacuum lines and used ties to tie them down.
Right now, the car has so little low end power, I can't even chirp the tires so beyond a new fuel filter, and then fuel pump I'm out of ideas.