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I have a 1990 Chevy Lumina 4d sedan, 6 cyl., mult-port fuel injection,
automatic, with 128584 miles on it. The problem: The engine will turn but
not start.
History: 3 months ago, all spark plugs and wires were replaced as part of
regular maintenance. The car ran as it should. Now the engine only cranks
but will not turn over. I've checked the fuel pump and it seems to be
working ( I can hear it start priming the system when I turn the key to
start the car). I can smell gasoline in the cylinders. I've checked all the
spark plug gaps and they are to spec. The wires are new and not corroded or
broken. The engine is getting compression when it cranks (confirmed by my
neighbor's son-in-law, who is a mechanic and happened to be visiting and
tried to help me out). I replaced a 12 volt relay, (on the advice of that
same mechanic) but that had no effect. I've checked and double-checked the
fuses and none are blown. I replaced the battery (it was due to be replaced
in 3 months anyway). All the fluid levels are full. I jumped the A and B
terminals on the diagnostic terminal {nomenclature?} and the check engine
light flashed 12 repeatedly, but reported no other engine trouble codes
(according to the repair manual, 12 means the onboard computer is in
diagnostic mode. After flashing 12 three times, it should flash another
trouble code if there is a problem). Finally, I've replaced the air filter
and checked the hoses for leaks, with no problems visible.
Question: What am I missing?
Thank you
I forgot to add that the car is fuel injected. I"ve added it to the
description above
DanielBaca
you did not mention whether or not you checked for a spark on the plugs.
although you smell gas in the cylinder, it may not be be getting enough. A
new fuel filter is a suggestion. i was in a similar situation... my car
would not start.... checked for compression, spark, fuel pump... all was
good.... picked up a fuel filter just to see... and problem solved.
PotGod
OK, I'll check the fuel filter. I remember getting sparks on the plugs, but
I"ll go over that again just to make sure.
Thanks and I'll let you know if it worked.
Daniel
DanielBaca
yeah i would check all the coils for spark with one of those lights you
just plug into the wire and clip to ground, otherwise with a voltage meter
51chevrolet
for sure let us know. you should be able to tell how clogged the filter is
by just removing it and trying to blow a little air through it.... mine was
clogged solid. a new filter has pretty much no restriction to the flow.
PotGod
these cars are notorious for the ignition module to go bad. as suggested by
other less experienced members check the spark. if you have no spark
chances are thats your problem
glagon1979
