Quickie TB Cleaning

[wc701lists at bellsouth.net]

On 3/8/2011 5:09 AM, Jon Pennington wrote:
> '94 G20t is having trouble; been parked for almost three months. :(
>
> I replaced the radiator-side motor mount, and since starting it up to
> roll it off the ramps, it just won't idle. I can hold the throttle
> open and maintain 2000 or more RPM, but if I let go, it stumbles to

I've let SR20s sit for extended periods, and just about always had 
trouble getting them to start / idle.  Holding the throttle wide open 
often gets them firing -- which makes me think they're prone to 
"flooding" but I can't think of any place in there for fuel to puddle. 
And then they seem to require some driving time to "clear out" what ever 
was bothering them.  Have you driven yours, or just had it idling 
briefly?  I can't make sense of it -- I've torn SR20 heads and engines 
apart and they're usually clean and should not be that finicky, BUT... 
just empirical experience.

The EGR shouldn't cause stalling.  Most of them run better with it 
blocked off.  A TPS or MAF problem will definitely make them stumble or 
stall.  Do you have an interface box and consult software to plug in? 
(c'mon -- doesn't everyone?  these things are 20 years old now!)  That 
will find bad sensors in a hurry, and let you set idle and timing 
correctly.  I'll send you a copy off-list of Nissan's diagnostic flowchart.

-Wayne