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It tries to start bot wont fully start. Not the battery it…

Customer Question
It tries to start...

It tries to start bot wont fully start

Mechanic's Assistant: Have you checked the battery, particularly the terminal connections? Are they corroded?

Yes not the battery it turns over fine

Mechanic's Assistant: What is the model/year of your Jeep?

99 grand cherokee 4.0

Mechanic's Assistant: Are you fixing your Grand Cherokee yourself? What have you tried so far?

Replaced injectors, crankcase sensor oxygen sensor, fuel pump jeep has set for several years. cleaned gas tank and has fresh gas

Submitted: 8 months ago.Category: Jeep
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Answered in 42 minutes by:
10/2/2017
Jeep Mechanic: Amedee, Jeep Technician replied 8 months ago
Amedee
Amedee, Jeep Technician
Category: Jeep
Satisfied Customers: 27,997
Experience: ASE certified Technician advanced level specialist. Wisconsin certified emissions state inspector
Verified

Hello and welcome!

My name is ***** ***** I can assist you with your question.

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Jeep Mechanic: Amedee, Jeep Technician replied 8 months ago

Do you still need some help sir?

Does the engine crank over and not start?

Have you checked for codes in the computer?

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Customer reply replied 8 months ago
still need help/ the engine cranks and sounds like it is going to start, but doesnt. we bought this jeep not running and have drained the old fuel and cleaned the fuel pump and replaced the fuel filter. can hear the pump running, have replaced the injectors and crankshaft sensor along with oxy sendoe
Jeep Mechanic: Amedee, Jeep Technician replied 8 months ago

Thank you for that information.

Have you checked for spark while cranking?

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Customer reply replied 8 months ago
has spark .. the engine tries to start but just wont catch and go
Jeep Mechanic: Amedee, Jeep Technician replied 8 months ago

Does it run on starting fluid?

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Customer reply replied 8 months ago
as long as it can smell it
Jeep Mechanic: Amedee, Jeep Technician replied 8 months ago

I am sorry??

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Customer reply replied 8 months ago
that mean i wasted my money
Jeep Mechanic: Amedee, Jeep Technician replied 8 months ago

I am sorry sir, I still dont understand your reply.

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Customer reply replied 8 months ago
you dont know any more than i do, do you
Jeep Mechanic: Amedee, Jeep Technician replied 8 months ago

I am not sure why you would say that sir. I am trying to help you.

Would you be willing to speak on the phone?

I can help pinpoint this no start issue.

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Customer reply replied 8 months ago
not for the 26$ you want. i have already paid 5 and you said you were sorry
Jeep Mechanic: Amedee, Jeep Technician replied 8 months ago

I can lower the cost of the phone call down to $5 buck for you because I want to help.

If you would rather continue here on this page, we certainly can.

We are just getting started.

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Customer reply replied 8 months ago
i only have a cell phone aand do not get good reception, hard to talk on it
Jeep Mechanic: Amedee, Jeep Technician replied 8 months ago

No problem sir.

If the engine has spark, we need to see if it will run on starting fluid.

If it does, then we know the engine is lacking fuel. Fuel pressure or injector pulse is preventing the engine from starting.

If the engine does not run on starting fluid, then we need to check engine compression as our next step.

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Customer reply replied 8 months ago
have check the injectors with a noid light have not checked fuel pressure,, it squirts out the schrade valve while cranking
Jeep Mechanic: Amedee, Jeep Technician replied 8 months ago

Ok, so we don't have solid evidence yet to have a diagnostic direction.

That means we need to get a fuel pressure reading.

Also, we need to see if the engine runs on starting fluid.

Let me know!

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Customer reply replied 8 months ago
the engine runs on starting, as i told you earlier, but stops as soon as it doesnt smell any
Jeep Mechanic: Amedee, Jeep Technician replied 8 months ago

Got it! Sorry about that.

Let's get a good fuel pressure reading just to be sure.

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