update on project 4ktq

[Brett Dikeman]

On Feb 20, 2006, at 12:37 AM, Matthew Kramer wrote:

>   I finally figured out that the engine was starving for fuel so I  
> have been slowly turning in the CO screw and things keep getting  
> better.  Timing is at 6 degrees and the vacuum advance is plugged  
> off for now.  At idle the 02 voltmeter is reading from .39-.59  I  
> am not sure what it should be...     I have noticed that the idle  
> doesn't want to come down after the engine is revved - it comes  
> down real slow, but that is probably due to the closed throttle and  
> wot switches not being there.    the other problem I have is  
> massive hesitation if I try to drive it.  I also noticed that as  
> soon as I try to drive it the o2 volts fall to .0x-.1x instead of  
> being .5 or whatever it should be.  I think I may possibly have a  
> bad o2 sensor but not sure...

A bad O2 sensor won't cause "massive hesitation", and you shouldn't  
be jury-rigging things to get the car going.  This will only cause  
problems further down the line.

I strongly suggest you put everything back the way it should be,  
wiring up any missing sensors, reset any screws/adjustments to their  
"default" position, if any.  You can either spend frustrating hours  
randomly stabbing in the dark, or hours following a method you know  
will eventually get you to the source of the problem.  You cannot  
troubleshoot things from an unknown stance.  You'll have the added  
benefit of knowing everything you checked is OK and once you find the  
problem, the motor should be running perfectly.

Once everything is back to "how it should be", follow the Bentley  
troubleshooting procedures/flowchart; if it won't start, follow the  
no-start chart, etc.  Do not skip ANY prerequisite steps unless  
absolutely necessary; they're all there for a reason.  Don't go  
measuring currents if the battery isn't charged, etc.

Brett