1990 tracker not starting

[fixkick]

Yes engine will run on test fuel. Timing belt is good. Crank pulley bolt is not loose it is to spec.

well , if will not run on test fuel.

1; compression test normal cold at 150PSI times 4.  (tested throttle open 1/2 to full, so has air)
2: spark is bad. (that includes spark plug tips shorted, or wet with fuel already or worse, no limits on bad spark tips, ever only looking at them works)

3: cat melted fully blocking exhaust fully. but sometimes you say it runs so is not that, as a melted cat never unmelts and unblocks.(on its own)

to run on test fuel,  engine OTTO CYCLE , rules.
A: engine must pump air. throttle does open and cat not melted, 400cc of air per cylinder and is an air pump.   and compression good.
a slipped timing belt can drop compression from 150 to 50 PSI,  DOOMED.  this is. and very common, on this engine, (poor service)
B: spark , strong and timed correctly x4; a timing light even works on a dead engine, sure does.


compression on this 8valve is 170psi hot, or 150cold, at sea level and throttle blocked open some 1/2  or more, and spark plugs out, battery fully charged.
that is a bench mark.   (and real)
also know that the Distrib on this car makes all spark, the ECU DOES NOTHING in the creation of spark the ECU is fuel only ECM.
The ECU can NOT advance spark either until 1991 year.
knowing that one fact and that the ignitor here loves to fail.  spark can come and go at any time,  and is very common on 89/90 TRACK/Kicks.



here the thing is....
never trust it, and fully test it, and repeat all spark tests, to be 100% sure  it is good to all 4 cylinders. and timing,
not only that but the fly weight mech. advance can rust and stick wide open(advanced huge) ,wrecking spark timing. as can that vacuum mess. there.

#6 love to fail worse GO INTERMITTENT and the gap on 5 set by humans.\\ Adjust the gap to .008-.016 inches.


there is no computers here, zero.  it is a relic of the past. long long gone this technology.

the china distrib, cap rotors on 91 up,  (not sure 90) can be put on 3 ways, and that is dead wrong it allowing that and a pain nobody needs, ever, just one more fly in the ointment of spark.

my 90 page is here, on spark dizzy.
the firing order is, 1,3,4,2 and CLOCKwise SPINS

buy mag HV wire sets not carbon junk or green silicon slime wire, sets, cheaper the spark is not strong on suzuki's and needs and loves mag wire sets.
the spark gap is not .045" as set in the NGK factory, no it is 0.028" due to this weaker spark real. (and was until first COP spark coil pack sets used 1996/99)

the ecu does in fact monitor spark (primary side only) and cuts fuel if it goes dead. (fire safety)
the drawing above is not accurate, it is simple and there are fuses that must be good too. even a loose or cracked IG-coil fuse can be horrible. #8 below.
LOOK MA? no CMP sensor (cam)