Cranks not start

Tiny
BIGMEAT1981
  • MEMBER
  • 2001 INFINITI I30
  • 3.0L
  • V6
  • 2WD
  • AUTOMATIC
  • 107,546 MILES
The car cranks but it won't start. Seem like it's not getting any fuel.I can hear my fuel pump come on.
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Saturday, May 16th, 2020 AT 10:13 AM

9 Replies

Tiny
KASEKENNY1
  • EXPERT
Let's start with the basics. The fact that you think it is a fuel issue, let's start there. Take some starter fluid and spray it in the intake and see if the engine will fire. It may not keep running but at least this will confirm it is a fuel issue. At that point, we need to check the fuel pressure and go from there.

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

If starter fluid doesn't start the engine then we need to remove a spark plug and hold it against the block when cranking the engine and see if there is spark. If there is no spark then we need to run a compression check.

Your engine needs fuel, spark, and compression to start so that is why we are checking these three things. Let me know what you find and we can go from there. Thanks

https://youtu.be/dCjmRL3p4Cs
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Saturday, May 16th, 2020 AT 7:15 PM
Tiny
BIGMEAT1981
  • MEMBER
I put a test light on the spark plugs. It's not getting a spark or fuel.
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Saturday, May 16th, 2020 AT 7:19 PM
Tiny
BIGMEAT1981
  • MEMBER
I sprayed the intake already and it didn't start.
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Saturday, May 16th, 2020 AT 7:21 PM
Tiny
BIGMEAT1981
  • MEMBER
Someone is helping me with the car. So here is what we did: We pull the gas line off to the engine started to car and no gas even came out the hose to even go to the engine, we did the spark plugs test and no spark. We did the reprogram keys thing and it still won't start.
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Saturday, May 16th, 2020 AT 7:39 PM
Tiny
KASEKENNY1
  • EXPERT
Okay, if you have no spark or fuel then the PCM is most likely preventing the start. That means we need to check for codes first.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Then we need to make sure the theft light goes out when you turn the key to the on position. If it does not go out, try leaving the key in the on position for about 30 minutes (or until the light turns off). Clearly turn off all accessory items so it doesn't drain the battery too much. If you have a charger then put that on there while doing this. If you have an active theft issue turning the light on then putting a programmed key in the ignition for this long will show the PCM that it is not currently being stolen.
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Sunday, May 17th, 2020 AT 5:37 PM
Tiny
BIGMEAT1981
  • MEMBER
The car doesn't have a check engine light on, and the security light goes out when you turn the key on.
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Sunday, May 17th, 2020 AT 6:13 PM
Tiny
KASEKENNY1
  • EXPERT
First just because there is no engine light does not mean there are no codes. However, let's operate as if there are no codes and this would point to a crank sensor. Basically if the engine doesn't have the crank signal it doesn't know when to fire the plugs or injectors.

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

If you have a scan tool that can monitor RPM let's crank the engine and look at the PCM data and see if it registers an RPM. If not then I suspect the position sensor is the issue.
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Monday, May 18th, 2020 AT 6:51 PM
Tiny
BIGMEAT1981
  • MEMBER
I replaced the crankshaft sensors today, both left and right and still no start.
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Monday, May 18th, 2020 AT 7:04 PM
Tiny
KASEKENNY1
  • EXPERT
We are going to have to get more to go on otherwise I can' only suspect the PCM. Clearly it controls the spark, fuel, and starter so I would normally assume something is telling the PCM not to fire them but if the security system is not active, no codes (we are assuming because we didn't actually check, you only said the light is not on), the crank sensors are replaced. That really only leaves the PCM itself.

So if it were me, I would check for codes just to make sure there are none and that you can communicate with it. If none are found, I would replace the PCM. You will need to program it and perform the security learn feature with a scan tool. Most tools can do this but just letting you know that you will need to perform it.
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Tuesday, May 19th, 2020 AT 5:16 PM

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