This is quite interesting. I didn't know that the '87 has fault codes.
I guess I need to find out how to retrieve them...can it be done without
a special scanner?
I don't think that the O2 sensor has anything to do with the operation
of the engine except when idleing. It provides feedback for the idle
position solinoid, but when the carb is off idle has no method to
control the engine. I would think that the O2 sensor could be ignored
except in the case where the vehicle will not pass an emissions test.
Tell me if I'm off base here. I haven't read the FSM in detail regarding
the computer.
My thoughts about poor performance this time of year would be related
to oxygenated fuels. My truck drops from 15 in town to around 10
when the exygenated fuels are used. Acceleration really gets bad
too. My commute to work is very short though (7 min.),
and I don't think that the choke is full open for very long.
-Jim.
'87 V6 auto 4x4
> At 05:51 PM 30/01/97 -0500, you wrote:
>
> The Holley 6280 carburetor is very finacky, it doesn't take well to vacume
> leaks(nor does any carb for that matter). The needle valve sits sidways and
> has a tendancy to get dirt blocking it open a tiny bit. It can be removed
> and cleaned by diconecting the fuel line from the carb, the brass nut that
> the fuel line is connected to is the needle valve, remove it clan it with
> compressed air and replace it.
> The O^2 feedback solenoid in the carb must also be working properly for the
> engine to run properly! it gets it's signal from the computer, which bases
> it's infomation on the O^2 sensor on the left exaust manifold, just after
> the air injection stream. Unfourtunatly the air pump plays a role in how
> smooth the engine will run because the O^2 sensor is calabrated with the air
> injection working, which probably is not after 10 years.
>
> Check you engine codes...
>
> FAULT CODES FOR 1987 DODGE DAKOTA 3.9 V-6
> -----------------------------------------
> 00 Diagnostic readout tool is reciving power.
> 11 O^2 solenoid control circut.
> 12 Problem with transmission unlock relay.
> 13 ignore(You are unlucky, go to dealer service and give them
> your VISA card, ;^)
> 14 battery was disconnected.
> 17 electronic throdle control solinoid.
> 18 canister purge solinoid
> 21 distributer pickup system
> 22 O^2 feedback solinod stuck in full lean
> 23 O^2 feedback solinod stuck in full rich
> 24 problem with computer
> 25 charge tempratur switch
> 26 coolant temprature sensor
> 28 distance sensor
> 31 engine was not crancked since battery was disconnected
> 33 problem with the computer
> 55 end of messages
> 88 start of message.
>
> Michael Jass
> '87 Dakota Fastback
--
James A. Babcock, Software Engineer email: james.a.babcock@adn.alcatel.com
Alcatel Data Networks WWW: http://www.adn.alcatel.com
Ashburn, Virginia USA personal web page: http://www.dogwood.com/~jbabcock
Give blood -- it's a great feeling!!!
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