Cranks no start issue

1992 CHEVROLET CORSICA
258,000 MILES • 3.1L • 6 CYL • AUTOMATIC
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CHYANNE SHERIFF
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my car will turn over , but will not start until i spray starting fluid, then it will start and will run for exactly two weeks. I changed spark plugs, checked fuses, can hear fuel pump come on every time before and after spraying starting fluid. there is blow back from intake. The car idles rough after driving when i shut it off and start it up again. why does it run for two weeks and then will turn over but not start? also, getting gas from schrader line.
Oct 18, 2016 at 8:01 AM
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WRENCHTECH
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The next time it refuses to start you need to test the fuel pressure using an accurate gauge.
Oct 18, 2016 at 9:17 AM
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CHYANNE SHERIFF
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Thank you I will do that ..... what should it show on the gauge?
Oct 18, 2016 at 10:04 AM
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WRENCHTECH
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Ignition "ON" Engine "OFF" 40.5 to 47.0 psi

With Regulator Vacuum Applied [1] ..... 3.0 to 10.0 psi Less than Ignition "ON" Engine "OFF".
Oct 18, 2016 at 10:07 AM
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CHYANNE SHERIFF
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Thank you ... I will let you know when i have it checked
Oct 18, 2016 at 2:20 PM
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STRAILER
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It does sounds like the fuel pump, please get back to us with your results, here is a guide to help

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Best, Ken


Oct 19, 2016 at 9:27 PM
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CHYANNE SHERIFF
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Thanks ...can you tell me where the fuel pump relay is located on a 92 chevy corsica 3.1 v6 engine? the fuel pump sounds very strong .. that is why i am asking about the relay .. i live in a town that has one garage so i have not had it checked yet
Oct 24, 2016 at 7:18 AM
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CHYANNE SHERIFF
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also why does the car run for 2 weeks and then it does not crank .. is it still the fuel pump?
Oct 24, 2016 at 7:20 AM
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WRENCHTECH
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Sounds very strong? That does not mean a thing. This fuel pump is wired to run without a relay so that won't be your problem.
Oct 24, 2016 at 7:59 AM
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CHYANNE SHERIFF
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Thank you ... i can cross that off ..
Oct 24, 2016 at 8:24 AM
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STRAILER
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Here is another guide that can help, a fuel pump will not make it not crank over.

https://www.2carpros.com/articles/car-cranks-but-wont-start

Let us know what you find.
Oct 24, 2016 at 9:12 AM
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CHYANNE SHERIFF
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Thank you .. a faulty fuel pump will not let my car crank over? is that right? also i was told that it cannot be the fuel pump relay because my car is made to run without one .. is this true?
Oct 24, 2016 at 11:32 AM
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STRAILER
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No here is the wiring diagram for the relay.

Please check it out to see if that is the problem.

Let me know , Ken

Oct 24, 2016 at 11:51 AM
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WRENCHTECH
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It is absolutely true that this engine will run without a fuel pump relay. It has a redundant power supply through the oil pressure switch which will power the fuel pump in the absense of the relay when the engine has oil pressure.
Oct 24, 2016 at 11:55 AM
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CHYANNE SHERIFF
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I thought I would update .. my car had to have starting fluid before it cranks every time i start it now.. does not last for 2 weeks any more .. for 2 days i used starting fluid and it will not start at all .. the battery died when trying to start it ..got a jump off from friend .. car still wont start and now the battery has died again after the jump off .. it turns over very slowly .. have it on battery charger now .. the car will turn over okay for a minute but then it will make an urrr sound when i try to start it and battery is dead again .. friend tried to check spark but he did not see a spark ... he thinks the battery could be too weak to check for spark .. can still hear the fuel pump ..
Oct 28, 2016 at 1:39 PM
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CHYANNE SHERIFF
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Just went outside to try the car again it turned over and tried to crank .. used little start fluid tried again and car backfired thru the intake ... tried again and car cranked with rough idle but it stayed cranked ... drove it for 5 miles . turned it off and started right back up .. will try it tomorrow .. i am taking it to have alternator and battery checked
Oct 28, 2016 at 2:15 PM
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STRAILER
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It sounds like you will a new battery to keep testing or at least have that once charged. But it is starting to sounds like you have a crankshaft angle sensor that that was weak and now has failed completely. Here is a video that will help get an idea on how you will change it.

https://youtu.be/sKo7xRWVNqY


Let me know how it goes.

Best, Ken

Oct 28, 2016 at 2:16 PM
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CHYANNE SHERIFF
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I had the alternator and battery checked and was told both were fine. The car started every day after jump off and ran for one week without a problem but today it will not start even with starting fluid. A neighbor said it could be a ground wire from the battery to the starter.. Have to put it back on battery charger. This car has a mind of its on ..also the fuel gauge is acting strange
Nov 6, 2016 at 8:18 AM
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CHYANNE SHERIFF
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I need to locate air mass flow sensor on a 92 chevy corsica 3.1 v6
Nov 6, 2016 at 11:03 AM
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STRAILER
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It will be in the air intake tube which is connected to the throttle body.
Nov 7, 2016 at 8:26 AM
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CHYANNE SHERIFF
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where is the fuel pump relay located on 92 chevy corsica 3.2 v6? thank you
Nov 22, 2016 at 7:08 AM
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CHYANNE SHERIFF
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3.1.. sorry
Nov 22, 2016 at 7:08 AM
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STRAILER
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Hey Chyanne,

Here is the fuel pump relay location.

Let me know how it goes,

Best, Ken
Nov 22, 2016 at 10:45 AM
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CHYANNE SHERIFF
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where is the ignition module located on 92 chevy corsica 3.1 v6
Nov 30, 2016 at 5:29 AM
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CHYANNE SHERIFF
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the mechanic is wanting to charge 255.00 to put in new ignition module ... he says he has to drop the starter to get to metal plate of the module ... is this true?
Nov 30, 2016 at 7:34 AM
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CHYANNE SHERIFF
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the crankshaft position sensor broke off in the block. the part that broke was where the wire harness plugs into sensor the rest of the sensor is stuck in the block is it safe to push the sensor into oil pan and leave it there without damaging the engine or transmission? Thank you
Dec 11, 2016 at 8:54 AM
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STRAILER
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Hey CHYANNE,

9 times out of 10 this would be okay. It is a bit of a gamble because it may get stuck somewhere on the crankshaft and when you crank the engine over it will lodge causing problems.

let us know what happens

Best, Ken
Dec 12, 2016 at 9:36 AM
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CHYANNE SHERIFF
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Is there a reluctor ring on this crankshaft (92 chevy corsica 3.1 v6) before i try to knock it in oil pan? can i drive car without knock sensor?
Dec 17, 2016 at 7:39 AM
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STRAILER
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There is no reluctor ring and yes you can drive it without a knock sensor but the check engine light will be on.
Dec 18, 2016 at 12:11 PM
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CHYANNE SHERIFF
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UPDATE... finally had the broke crankshaft position sensor removed .. my brother removed it in 3 hours .. he had to drop the oil pan .. it was the cps that caused the " no start"
Jan 30, 2017 at 8:54 AM
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STRAILER
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Thanks for the feed back glad you could get it fixed please use 2Carpros anytime we are here to help.

Best, Ken
Feb 2, 2017 at 6:08 AM