Re: update to my famous fuel problems

[srubano@xxxx]

This is just a suggestion, But I have heard that if the O2 sensor 
is "plugged up" with a lot of carbon (where it has a hard time 
sensing) it can cause crazy and erratic idle. Since your car may have 
been running rich for some time this may be the case. It's an easy 
check (pull out the O2 sensor and look at it) I would start there. 

Also, is he using a CO analyzer to set the CO or is he doing it 
by "feel"? He should be measuring the CO per each head (removing the 
access ports located on each side of the cross over pipe) along with 
measuring at the cat.

Steve


--- In dmcnews@xxxx, Soma576@xxxx wrote:
> Hey all,
> 
> my DeLorean now sits in the service bay at Valley Imports in Fargo, 
ND - a 
> porsche, BMW, VW, and audi dealer. here's the scoop:
> 
> they have the car actually RUNNING with a little bit of help. the 
technician 
> got it running after a few turns of the key and a couple of gas 
pedal 
> thrusts. it'll run now but it only sounds right in the higher 
RPM's, as in, 
> above 1500 RPM or so. he was playing with the throttle and the CO 
screw and 
> he could get it running pretty damn good in the upper RPM's, then 
as it drops 
> down to idle, you have to be really careful about letting off on 
the gas or 
> else it will die. he had to be really slow and help it along. 
finally it 
> would hold an idle, but it surges up and down between about 400 RPM 
and 1100 
> RPM or so, in regular approximately one second intervals for each 
surge. the 
> fuel pressure is within specs. the car would dip down to about 400 
RPM and 
> almost choke itself to death every time until it eventually does. 
the tech 
> said that my suction fuel hose in the tank is pinching somehow, 
even though i 
> have one of Jim Reeve's springs inside of it. he didn't say that 
this was 
> the reason the car won't run well though. it's just a note. he 
seems to 
> have the idea that my fuel distributer is faulty or 
malfunctioning. for the 
> record, yes he is putting his thumb over the CO screw every time he 
works 
> with it.
> 
> anyone have any ideas on what could be causing this crazy idle? 
i'm getting 
> closer yet i'm still so far!!!!!
> 
> Andy
> 
> 
> 
> Soma576@xxxx
> 1982 DeLorean DMC-12 VIN#11596
> Fargo, ND 58102
> 
> 
> [Non-text portions of this message have been removed]