Yes, you could have mice who took up residence in the air intake box/baffle. I didnt notice, did you replace the air filter too ? Ive seen them soaked with injested water and they swell up cutting off most of the air even after they dry out.
Ugh, sounds like a terrible way to die even for a mouse. What does a dried mouse look like anyways, furry beef jerky?
the air cleaner is a recently cleaned K&N. the air box and TB hose are all clean too. i also ran the engine with the TB hose off and the same problems persisted.
i'm so over this that i'm going to limp it over to a mechanic and just pay them to figure it out.
i've already spent 6 months car-less and had more than enough headaches trying to restore this one. =[
I've had problems like this with a couple vehicles. At least the power issue sounds like fuel. On the one vehicle where I was able to resolve the problem it was really just a clogged fuel filter. The PO had bypassed the filter with a line and a valve. I turned off the valve for fear it would drip onto the alternator below. The car was driveable but with very limited power. It would buck if pushed, especially over forty miles an hour. In Texas flatland I could do seventy after a very long acceleration.
The other vehicle was a van that had been modified to make it accessible. Somewhere I heard that people had run into problems in similar vehicles due to metal shavings getting into the gas line during the modification process. In that vehicle it would drive well when cold, but once warmed up it would buck if pressed even a little, although it would cruise at highway speeds without problems. I suspected the fuel pump, but after that failed and was replaced it still ran the same.
It's possible you have two problems. The fact that you were able to get rid of the screech and/or not hear it by removing the air intake might be an important clue. Good luck!
after many days of contemplation, my friend and i came to an astoundingly simple hypothesis: the cat could be broken/clogged.
i took it to an exhaust shop and sure enough, the cat was clogged so badly that the back pressure created at high revs would "screech" exhaust past the manifold junctions. this also explains the power loss and inability to rev past 4k because the exhaust was constricted so badly. this also also explains the "O2 rich" code because exhaust was building in density before the cat.
the car drives GREAT now, sounds a lot better, and has so much more power in the upper revs!
after many days of contemplation, my friend and i came to an astoundingly simple hypothesis: the cat could be broken/clogged.
i took it to an exhaust shop and sure enough, the cat was clogged so badly that the back pressure created at high revs would "screech" exhaust past the manifold junctions. this also explains the power loss and inability to rev past 4k because the exhaust was constricted so badly. this also also explains the "O2 rich" code because exhaust was building in density before the cat.
the car drives GREAT now, sounds a lot better, and has so much more power in the upper revs!
i'm a happy camper. =]
Great to hear you found a solution! Did you replace the converter or just delete it?
Great to hear you found a solution! Did you replace the converter or just delete it?
i just replaced it. emissions is a must where i live.
i was going to have them flange it so i could throw a test pipe on whenever i wanted... but i like the sound of it as it is and am ultimately lazy when it comes to those sort of things.
Have you tried it with the air box/canister top off? BTW what type oil did you use for the breakin? Hopefully it was something like Royal Purple's breakin oil for push rod engines -IE it has zinc/something like it. Older push rod engines need special oil.
Have you tried it with the air box/canister top off? BTW what type oil did you use for the breakin? Hopefully it was something like Royal Purple's breakin oil for push rod engines -IE it has zinc/something like it. Older push rod engines need special oil.
everything is good, we discovered that the cat was clogged and causing all the problems. and yeah, i used an oil with some mild detergents and a zinc additive.
I think if an air leak is so big that it runs lean it could hesitate and buck. But I still dont know about a screech sound, or why an O2 rich code would show up..
If a cat us plugging could it cause this symptom?
Nice. The symptoms were there. No revs above 4.8k, engine lacks power. I got stuck on the noise.
[IMG]http://i16.photobucket.com/albums/b50/francis4
