Fuel Injection

Tiny
JOHNARNOUTS
  • MEMBER
  • 1992 JEEP WRANGLER
  • 2.5L
  • 4 CYL
  • 4WD
  • MANUAL
  • 236 MILES
My car just cut out on me and now will not start. I changed the fuel filter and I have 40 PSI at the fuel rail. What should my PSI be?
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Sunday, April 16th, 2017 AT 3:20 PM

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Tiny
CJ MEDEVAC
  • EXPERT
I looked in Prodemand for the specs.

Seems that checking fuel pressure is a real involved thing, not just hooking a gauge up.

In the reading, and testing 'their way', 45 PSI was the minimum. (If done your way, it is possible their results may more like yours-maybe?)

Let us pretend that fuel pressure is fine, for now.

Do you have spark?

A one to two second shot of starter fluid into the throttle body will either cough - spit - sputter or even run for a moment.

If it does do the above, there is spark!

This might even confirm there is a "no fuel issue" (for whatever reason), as it did run, or tried to, with that little bit of fuel, but won't fuel itself.

If you tried the shot of starter fluid and it did nothing but dry 'over and overs', I would snatch a plug and confirm there is no spark or you might even try this easy method without pulling a plug. See link below.

http://shop.advanceautoparts.com/p/lisle-inlline-spark-tester-20610/22984543-P?searchTerm=spark+tester

Easy pull a plug wire, insert this in-between.

What were the results?

Finding no spark or finding no fuel will show which path to follow to get you going.

The Medic

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Sunday, April 16th, 2017 AT 7:15 PM
Tiny
JOHNARNOUTS
  • MEMBER
Thank you for the information. I am going to pull the plugs and check them I can not get it to fire when I put starter fluid on it. But I do not think that all four would go out at one time. I was driving the jeep and it just cut out. Like someone turned the key off. There was no spitting or spattering. Even though there is not a check engine light on could it be the computer or a sensor? I have seen in jeep forum people talking about the map sensor or crank sensor. But I was lead to believe that if it was something like this; my check engine light would be on. That is why I have not thought that the injectors are not working too. And would they all go bad at once?
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Monday, April 17th, 2017 AT 4:24 AM
Tiny
CJ MEDEVAC
  • EXPERT
Lets check a few things

Distributor cap for cracks or carbon trails/ tracks on it

Pop the distributor cap and inspect the rotor button, see if the rotor button turns while cranking

Look the connections over at the distributor, are they corroded or green?

While someone cranks the Jeep, wiggle/ move the wires around see if anything happens.

Check fuses

See my 2nd pic, I grabbed this outta "Prodemand", it may be a possibility

We'll keep going/ results?

The Medic
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Monday, April 17th, 2017 AT 7:02 PM
Tiny
JOHNARNOUTS
  • MEMBER
I just changed the spark plugs. I think we have made progress. Clearly the plugs were not firering. It is chugging now but completely turning over. Do you have anything to add that might help to get it to turn completely over?
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Tuesday, April 18th, 2017 AT 2:57 PM
Tiny
CJ MEDEVAC
  • EXPERT
Think Mr. Battery is up to snuff?

You can pull it and have it checked at most auto parts stores for free.

So it will no make a full revolution?

Look this over

https://www.2carpros.com/questions/1996-chevrolet-tahoe-wont-start-sounds-dead-battery-jumpbox-get-same-reults

The Medic
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Tuesday, April 18th, 2017 AT 4:32 PM

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