[AMC-List] 86 Cherokee Smokey, Clattering, etc.

[JOE FULTON <piper_pa20@xxxxxxxxxxx>]

I'll take a shot at this since I had a 85 S-10 Blazer
with the E2SE carb like the Cherokee.

First, I would make sure I had the valves adjusted
properly and do a cold compression test to confirm
that.

Then I would tackle the timing issues and make sure
that the balancer indicates TDC when the No. 1
cylinder is at the top of the compression stroke.  If
it's not you have a slipped balancer or the timing
chain has jumped.  It sounds like it is a high mileage
engine because of the rear main seal leak.  Once,
done, you can set the timing and know that it's
correct.

For everything else you are gonna need a Jeep TSM or a
GM manual for the same engine.  You have an electronic
carburetor and a myriad of vacuum hoses.  You need to
make sure that the hoses are all sound and that they
are connected properly.  The carb is controlled by the
basic GM C4 emissions system computer (ECM).  You need
to make sure that you have a good oxygen sensor and
that there are no leaks into the exhaust system which
will make the computer think it is running too lean
and then it will richen the mixture.  You have a
mixture control solenoid in that carb, not a stepper
motor, like the AMC systems.  The mixture control
solenoid function can be tested by procedures in the
TSM.  It can also be adjusted but you need to know the
procedure and it takes a jumper wire and a dwell
tachometer to do it.  

I would also check the ECM to see if it is showing any
codes (rich mixture, etc.).  The TSM will tell you how
to do that.  If you work methodically you can sort it
all out.

Good luck,
Joe Fulton
Salinas, CA
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