Runing extremely rich. what's the usual suspect?

Note: I tried a search but TGO's very slow today, thought this would be faster.

 

o2 sensor, and CTS. possibly MAP, but not likely, unless it has somehow lost vacume.

 

Timing too retarded causing low vacuum. Leaking fuel pressure regulator diaphram. Bad injector. Orings that seal the injector to the injector pod.

 

Timing too retarded causing low vacuum. Leaking fuel pressure regulator diaphram. Bad injector. Orings that seal the injector to the injector pod.

 

I have so much carbon deposit that I get knock with 91 octane, 87 is out of the question. I tried the water trick last summer to get some of the carbon out, but I don't think I did enough, now when I run the car cold (I don't run it too often due to it being winter) the TB whistles real loud until it's warm.

to the comment about timing being too retarded, I thought if it was too advanced it would cause a rich condition?

 

TBI whistling is another sure sign of retarded timing. Retarded timing makes the engine put out less power, lowering vacuum, richening the fuel mixture. I guess advanced timing could do it but you would hear the engine pinging and the idle would be really rough.

 

I guess it a ping (usually at part throtle) and not a knock. but the idle is smooth

 

if your idling and you very gently apply pressure to the throttle does the whistle increase then stop at a certain RPM?

 

yup. it only does it at (around) idle. once I yank on the linkage it stops.

 

O2 sensor is new. I changed the O2 for my last emissions test, but didn't pass till I changed the cat. I failed that test 4 times before I passed on the 5th. I'll probably have to change my cat again after I fail my next test a couple of times. sorry for the ignorance but what is CTS?

 

dude thats what mine does!!

I think theres a vacum leak at the back of the intake manifold on mine. Thats where the noise comes from.

Whats your timing set at?
Have you used a hose to listen around the TBI unit for leaks?
My timing is advanced 6* and I run high octane.

have you checked all the hoses connected to the TBI?

 

No the hissing noise is coming from your IAC valve more than likely. If you were to pull off the air cleaner and stick your finger over the port on the rear passenger side of the TBI it would probably stall.

 

Mine whistles like that too.... Recommendations?

 

hey me 3!! sounds like a Civic on steroids... it sounds more like a suck whistle than a blow whistle.. pretty mean sounding, but i am running rich, dunno about timing, feels alright though