98 Camaro no start - LS1LT1 Forum : LT1, LS1, Camaro, Firebird, Trans Am, Engine Tech Forums
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post #1 of 44 (permalink) Old 10-29-2013, 08:35 PM Thread Starter
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98 Camaro no start

busy got a 98 3800 v6 5 speed stripper model it cranks, firing but no start! it has fuel pressure.don't think the injectors are firing. any ideas?? new crank and cam sensor, new timing chain and gears no security light flashing
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post #2 of 44 (permalink) Old 10-30-2013, 06:20 AM
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If unsure about injectors firing.I would poll the fuel rail. And crank the engine to see if they fire... If not check with a multimeter to be sure they are getting.juice while cranking. To confirm if there is a problem with injectors or electrical. I doubt all the injectors would go bad at once so probably electrical if they are actually not firing

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post #3 of 44 (permalink) Old 10-30-2013, 07:06 AM
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things you need to know; when testing injector circuit the positive wire of injector gets battery power anytime key is turned to on. It is the injector ground that pcm supplies to open injector.

So use noid light or 2 lead test light to check. Have assistant crank engine. Light will blink on and off if injector is getting ground from pcm.

Also when pulling fuel rail and checking injector function and spray pattern, have catch cans under each injector, and a FIRE EXTINGUISHER at hand just in case. Your working with a highly flammable liquid.
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post #4 of 44 (permalink) Old 10-30-2013, 07:08 AM
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also get a spark tester, the kind that puts a load on ignition system and test several plug wires on each side of engine for good spark.

So basically, your no start problem is either fuel or ignition related since security light is not staying on.

After testing fuel and spark get back to us and we're go from there.

Forgot to add in last post, buy a fuel pressure gage and test during key on prime. Should have around 43 psi.
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post #5 of 44 (permalink) Old 11-03-2013, 07:05 PM Thread Starter
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ok so he soused starting fluid while cranking and all it did was pop back for stop I'm thinking its timing set done wrong
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post #6 of 44 (permalink) Old 11-21-2013, 05:53 PM Thread Starter
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Ok we pulled the timing cover off and the timing is off when the crank is at 12 the cam is at 12o.cl ock and Im wondering. Do we need to pull the rocker arms to set it. Right ?
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post #7 of 44 (permalink) Old 11-22-2013, 07:11 AM
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Rotate crankshaft by hand until it's dot is in the 6 o'clock position. Check to see where cam dot is. Then rotate crankshaft 1 complete revolution so dot is back at the 6 o'clock position now. Is cam dot at the 12 o'clock position now.

Your working on a 4 stroke engine. It takes 2 complete crankshaft revolution for the cam to make 1 complete revolution.
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post #8 of 44 (permalink) Old 12-07-2013, 09:24 PM
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Just rotate the crank a second revolution and make sure gears are lined up dot to dot

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post #9 of 44 (permalink) Old 02-16-2014, 07:40 PM Thread Starter
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ok they are dot to dot,I bought the car of him for 500, so i'm going to put it Bach together and try to get it running!
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post #10 of 44 (permalink) Old 02-17-2014, 06:52 PM Thread Starter
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ok I got spark and fuel, no start! yes I have injector pulse....it tried to back fire once, i'm kinda lost unless it bent some push rods
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post #11 of 44 (permalink) Old 02-18-2014, 12:40 PM Thread Starter
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bump
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post #12 of 44 (permalink) Old 02-18-2014, 08:02 PM Thread Starter
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well I tried to stay it with starting fluid ask it did was throw a big flame back at me... i'm going to switch out the ignition modular under the coils?
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post #13 of 44 (permalink) Old 02-18-2014, 09:47 PM
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If your throwing flames back at you, your crank and cam are incorrectly timed.
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post #14 of 44 (permalink) Old 02-18-2014, 09:56 PM Thread Starter
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I checked them, turned the crank and it went dot to dot,...I checked cylinder psi on one cylinder and out was only 60psi, is that low?
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post #15 of 44 (permalink) Old 02-18-2014, 09:57 PM Thread Starter
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ok check the timing again,I have to pull that shit apart again! ugh,lt1s are easier to play with
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