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Country Discussion Topics
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89 Chevy Mech Q
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Gunner    Posted 12-30-2004 at 16:33:29       [Reply]  [No Email]
Left the lights on my 89 pickup which drained the battery completely dead. Recharged the battery all day and tried jumpin it w/ another vehicle - No luck. It cranks hard, like normal, but doesn't turn over
Not familiar w/ fuel injection, but it smells like its gettin gas
Changed the fuel filter about 3 months ago and it has run fine since just not sure why it won't start now
Can FI flood itelf? How long would you let it crank?


Husker    Posted 12-31-2004 at 06:36:23       [Reply]  [No Email]
Had a similar problem on my 87 ford pickup. It turned out to be a emergency fuel shut off to the fuel pump system in case of roll-over. Look in the manual to see if Chev has one also. Finally, I couldn't keep it on after resetting, so wired a bypass. no problems since. It was a circuit breaker on the Ford, located on the inside firewall above the clutch.


Bob    Posted 12-30-2004 at 17:36:46       [Reply]  [No Email]
Use a spare spark plug, with the contact bent open to over 3/16", and clamp it to grounded metal, and connect one of the spark plug wires to it. Then, crank it over, and chack for spark. If there is no spark, it may have a bad ignition pickup, or module, or shorted computer.

Distributor caps and rotors on these are known to fail, also, shorting out the spark.

If the ignition pickup or module has failed, the computer will not know the engine is cranking, and will not inject fuel.

If there is spark, and you suspect it may be flooded, hold the accelerator to the floor, and crank the engine over. This puts the computer in "Clear Flood Mode", and it does NOT pulse the injectors, and therefore adds no more fuel to the already "flooded" cylinders, so they can clear of excess fuel. It MAY fire than, if flooded.

Check for spark, and post back.

P.S. ...

Also check the several fuses labelled "IGN" or "ECM" (computer).



Gunner    Posted 12-30-2004 at 17:56:15       [Reply]  [No Email]
Just tried again - It does spark, and I can smell the gas - Cranks very strong
Must be the computer.?
Is there a way to reset the computer?


Bob    Posted 12-30-2004 at 19:33:54       [Reply]  [No Email]
If you have gas and spark it SHOULD start. If it's really getting gas (spraying out of the fuel injectors, and down against the throttle plates), the computer is at least partially working, and it should at least fire and try to start on that gas. (The injectors are "pulsed" by the computer, and if the injectors ARE spraying, the computer is doing that, and that fuel plus the spark should make it try to start.)

Take a look at a spark plug or two, and see if they are wet with gasoline.

Be carefull, and keep your face away from the top of the throttle body, incase it decides to backfire flaming gas. And have an extinguisher at hand!


mark    Posted 12-30-2004 at 17:43:26       [Reply]  [No Email]
and for wet plugs. don't cycle the key to off
while trying to clear a flood, everytime it goes
to on it gives a shot of fuel


Clod    Posted 12-30-2004 at 17:09:13       [Reply]  [No Email]
if you suspect there is no fuel supplied.take off the air cleaner.get a can of choke/carb cleaner and spay into the intake while a friend cranks it.if it tries to crank ,you have a failure to supply fuel.Sometimes you can reset the computer by removing the plus cable from the battery and resinstalling it. Hope you charged with 12VDC only.You can dammage the computers .NO,I know nothing about those.


Gunner    Posted 12-30-2004 at 17:45:42       [Reply]  [No Email]
Yes, 12VDC charged only - Tried jumpin' prior to that -
Tried takin the air cleaner off, but didn't spray anything since I know very little about the workings of FI
Would a splash of WD40 in the "carb hole" do anything? Keep in mind this is fuel injected -
Ohboy. Just read the part about removing the plus cable - Yeah, did that, it reset the volume to my non-functioning stereo to 1/2 full(thankfully) but this may be the general direction as to why this Chevy won't start.
At this pt., I would not rule out bad fuel either - but not sure how to determine that.


Clod    Posted 12-31-2004 at 05:54:26       [Reply]  [No Email]
Use carb and choke cleaner,(Not WD 40).If it is flooding it wont start,If it is failure to get fuel it will start wiith carb cleaner simply because it is an internal combustion engine and if you have fire ,timing, compression then add combustible mixture it will crank.Do as a guy above suggested with another plug stuck into a plug wire then grounded to frame with a jumper cable to check fire.>><> BUT, It was running fine,You left the lights on,The batt went dead,Maybe if you could had put another hot battery in it would have cranked.


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