Okay, I haven't find any help over at the integra forum, and since i want to go turbo soon and have my turbos apart right behind me i thought I'd ask in here.

I have a b18b which has the following symptoms:

Low gas mileage - 10-15mpg.
Heavy dark exhaust - very very smelly and gross.
Engine shakes when idling esp. in the cold - and whenIi open the throttle in neutral it shakes a whole lot.

This is what I've tried -
First thing i thought was maybe it's fuel pressure... just running rich (I had a turbo on this car for about a week, but since there was a minor oil leak on the turbo I took it off and am going for a rebuild.) Mabye my FPR is broken
So, I bought a fuel pressure gauge and no dice - at idle i'm right at 39psi

Second - I've had people tell me it sounds like a misfire problem, so I've replaced my plugs, wires cap and rotor. I don't really know what to make of the results - the engine hasn't changed it's behavior at all. When i took the plugs out (the old ones) they were dark black.

So where do I go from here? Is it my O2? (I am not throwing a CEL) Is it my MAP sensor? Why is my car running so poorly?

Thanks to anyone that responds - I really do appreciate it.

 

I'd guess bad cat since it's stinks really bad. Also your o2 may be bad. Larry

 

I would check O2 and the cat first.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C4-T &raquo;</TD></TR><TR><TD CLASS="quote">I'd guess bad cat since it's stinks really bad. Also your o2 may be bad. Larry</TD></TR></TABLE>

So - the cat could make my car run like this if it was 'bad'? and my o2 can be bad without throwing a CEL?

 

I knew a guy who drove his car around without his cat and o2 sensor at all.

His car didn't get great gas miliage - but it defiently didn't run rough like this or anything...

Should i just disconnect my o2 and see if it runs better then? if that doesn't work disconnect my exhuast and try that?

 

last bump before bed

Any ideas would be great, thanks

 

How do I test to see if it's my o2 sensor or my Cat that is making my engine run like this???