rounin rough, again

[Jesse+ Clendenning]

It sounds like the car is running lean. Since you've replaced worn hoses and
are sure there is no vacuum leaks, and the fuel pump is not noisy? I would
then start by checking the computer codes by shorting the fuel pump relay
with a fuse. Record faults and start there. Use the list for details, trying
to keep this post concise.
If no faults are stored, then I would next measure the current passing
through you're differential pressure regulator by hooking the meter in
series. You're car is probable CIS III. The current should vary around 0
milliamps when warm. Higher when cold (Richer). If it does not match when
cold check the temp sensor mounted on the coolant intake to the cylinder
head. It has the two prong, rectangular connector. At operating temperature
it should be ~ 130 ohms. 68 degrees should be ~ 1000 ohms. The colder, the
more resistance. If it matches then this is not you're problem and you
should next move on to the idle stabilization system.
Let me know if you need any details there.
On Wed, 25 Apr 2001 14:10:04 -0700 (PDT), Ron Wainwright wrote:

>     Hello list,
>  
>   I'v been havin a problem with the way my 87 5ksq(non
>  turbo) has been runnin I posted the problems about a
>  month ago goes somethin like this,
>   car starts,
>   idles at 1k then under 700 rpm and car starts to
>  shake I'll hit the accelerator pedal and a pop,
>  backfire noise comes from under the big black boot
>  that covers the fuel distributor, smoothes down after
>  a while then when drivin it feels like it don't have
>  any power,
>  
>   So after more than a few people saied that my 02
>  sensor was bad I replaced it even though It only had
>  35k on it and it was the 3 wire bosch oe direct
>  plugin, it didn't make a difference now other things
>  that have been replaced within the past 6k are,
>   all hoses with good ones, cap/rotor, plugs, gas, air,
>  oil filters, ignition coil, coolant sensor, thermo
>  time switch(the two on the driver side front of valve
>  cover) throttle switch about 35K ago, plug wires about
>  30k ago, fuel injectors & lines about 20k ago,
>  everything has been replaced with eather Bosch, Mann,
>  or OE,
>   lets just saie the only things that haven't been
>  replaced in a while or never are the fuel distributor,
>  and throttle body.
>     I'v looked at Scotts web site but I'm stumped what
>  am I forgetin? any help would be great
>  Thanks
>  Ron
>  
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