No start, no codes - Chevy Impala SS Forum
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post #1 of 44 (permalink) Old 03-14-2019, 05:38 PM Thread Starter
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No start, no codes

Hi guys,
Just replaced my starter, now engine cranks but won't fire. Engine ran fine 4 days ago. Car has about 1/3 tank of fuel & front end is still up on jackstands (not sure if this would make a difference).
Can hear fuel pump runs when ingition switched to key on. Is there an easy way to test for spark?
Thanks

Remember, when not sure what to do, hit the throttle.
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post #2 of 44 (permalink) Old 03-14-2019, 05:43 PM
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I've hooked up a starter before either missing a wire or getting one on the wrong post. It would crank but not start. Nosey, why did you replace the starter? As long as you don't have the car jacked a lot higher than a San Francisco hill then not an issue.

\'96SS SOB: SSRI, Herter Tune, Tri-Y II, , 3000 Edge, F/HO bars, METCO extendeds with CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear)
\'96FWB BUW-Butt Ugly White: PCMPerformance tune, HDFA w/ swissed filter, 1/2 SLP s.s. catback with H- and Flow Super 50s, oem opti rebuilt 3 times, SS Bars, METCO LCA, Airlift 1000, Monroe SS, PowerTrax No-Slip, CTS wheels with +1 rubber. Finally, wait for it... LT-4 knock module!
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post #3 of 44 (permalink) Old 03-14-2019, 05:52 PM Thread Starter
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Yeah, I figured an incline wouldn't prevent engine from starting. I replaced the bendix drive gear & solenoid in the starter because when trying to start the car, the starter motor would spin but the engine wouldn't turn over.
Only reason I figured starter might be cause of no start is if it couldn't crank engine fast enough, but it does seem to crank fast enough (I've got no way to monitor rpm while cranking)

Remember, when not sure what to do, hit the throttle.
It may not end well, but at least it'll end the suspense.
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post #4 of 44 (permalink) Old 03-14-2019, 09:47 PM Thread Starter
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I've got spark & I can smell fuel at the tailpipe after cranking. I connected a scan tool to read rpm while cranking, it indicates about 150 rpm.
What is the minimum cranking speed required to start engine?
Thanks

Remember, when not sure what to do, hit the throttle.
It may not end well, but at least it'll end the suspense.
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post #5 of 44 (permalink) Old 03-15-2019, 10:09 AM Thread Starter
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UPDATE car started up this morning, I let it warm up, turned it off & started it back up 3 times in a row no problem. I let the car cool for an hour, came back and started it up no problem, let it warm up.
At this point I figured the starter is fine and maybe the car wasn't starting because something was wet. (I had a half inch of water on my garage floor)
I took it for a drive & the engine died at the end of my street. Still, no codes. I did notice that on the optispark end of the coil wire was a small red sleeve around the wire that is cracked. Does my optispark need to be replaced?

Remember, when not sure what to do, hit the throttle.
It may not end well, but at least it'll end the suspense.
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post #6 of 44 (permalink) Old 03-15-2019, 10:11 AM
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Find someone with a live data scanner or computer program. It is easier to plug in to check than probe the OPTI. A intermittent problem is hard to work on, but if it does not start you should be able to get real information on the problem.


If you have spark and injectors the OPTI is working.(does not mean it is working properly) Do you still have these now?

Z09B4U

Last edited by Z09B4U; 03-15-2019 at 10:19 AM.
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post #7 of 44 (permalink) Old 03-15-2019, 10:19 AM Thread Starter
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Yes, I had a battery charger on the battery between tries. Do you know what speed the starter should turn at?
Because the car died while driving, I think something else is wrong

Remember, when not sure what to do, hit the throttle.
It may not end well, but at least it'll end the suspense.
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post #8 of 44 (permalink) Old 03-15-2019, 10:33 AM
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I'm not there to hear, but kinda thinking it's gonna be pretty easy (for anyone who's been driving even a few years) to tell whether there's even a hint of the starter dragging lower than normal speed. What's your ear tell you that you have a concern there? During the time to arrange a scanner or program I'd be pointing the most attention toward replacing that wire and making the business case to do new IC and ICM (always together) since they're normal maint. items after about a 1/4 century. And if the car's never gotten distributor tune-up parts then it's WAY overdue.

\'96SS SOB: SSRI, Herter Tune, Tri-Y II, , 3000 Edge, F/HO bars, METCO extendeds with CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear)
\'96FWB BUW-Butt Ugly White: PCMPerformance tune, HDFA w/ swissed filter, 1/2 SLP s.s. catback with H- and Flow Super 50s, oem opti rebuilt 3 times, SS Bars, METCO LCA, Airlift 1000, Monroe SS, PowerTrax No-Slip, CTS wheels with +1 rubber. Finally, wait for it... LT-4 knock module!
96 Black is online now  
post #9 of 44 (permalink) Old 03-15-2019, 10:34 AM
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Quote:
Because the car died while driving, I think something else is wrong
Sorry I edited my first post when you reported back. I have no crank data but you got it to start.


The OPTI has two sensors one that senses coarse position of the pistons. If the PCM gets this data the engine will start but not run well. This data can be scanned on a 94/95 car. The fine data 360 pulses would have to be checked with a scope.


With no diagnostics I would carefully unplug the harness at the OPTI and use a ELECTRONIC spray cleaner on the OPTI and it's connector. There is a second connector on top of the manifold you could also unplug and clean.


Quote:
I did notice that on the optispark end of the coil wire was a small red sleeve around the wire that is cracked.

I would replace a coil wire before changing the OPTI. Are the plug wires good?

Z09B4U
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post #10 of 44 (permalink) Old 03-15-2019, 11:32 AM
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Not a smart ass comment but sounds like its simply low on gas.
Even if gauge show 1/3 tank, its probably a lot lower.
I'd check fuel pressure, and if low add 5 gal.
then check spark.

Nab
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