Engine not starting?

Tiny
JAMESODOM
  • MEMBER
  • 10 POSTS
No the fuel pressure does not drop.

I did a compression test on it when I first received the vehicle to work on it. They were all good. I just don't remember the numbers. I can do another compression test on it and see what they come out to be.
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Sunday, August 30th, 2020 AT 10:47 AM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
I see something goofy in the data. On page 3 the Bank 2 Pulse width is 50. That can't be right.
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Sunday, August 30th, 2020 AT 10:47 AM (Merged)
Tiny
JAMESODOM
  • MEMBER
  • 10 POSTS
What could cause this? This data was taken Key on Engine Off.
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Sunday, August 30th, 2020 AT 10:47 AM (Merged)
Tiny
JAMESODOM
  • MEMBER
  • 10 POSTS
Also what would be Bank 2 on a Inline 6 Engine?
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Sunday, August 30th, 2020 AT 10:47 AM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
I don't know. It doesn't make any sense. Are you sure you have the correct PCM and it's flashed correctly?
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Sunday, August 30th, 2020 AT 10:47 AM (Merged)
Tiny
JAMESODOM
  • MEMBER
  • 10 POSTS
  • 2000 JEEP GRAND CHEROKEE
  • 4.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 210,000 MILES
1. Towed to shop due to Crank no Start condition
2. ODB Computer (Autel DS708) Showed NO Code.
3. Vehicle will crank over and sometimes will start and run really rough then die.
4. Most times it will not run at all. It blows compression back through the throttle body
5. It will back fire sometimes.
6. The crank sensor tested good
7. CAM Sensor tested good
8. Map Sensor test good
9. Coolant Sensor Test Good
10. Fire on coil is good
11. Injector pulse is good
12. Fuel pressure is good
13. Checked Timing on the Balancer and it showed good. Removed the Timing cover and checked the chain and it showed good
14. I came to the conclusion that the computer was bad.
A. I ordered a used one from the salvage yard and had it programed
15. I replaced the computer and it did crank and run but had a Miss to the engine
16. ODB Codes showed Coil Misfire problems
17. Tested the Coil and it tested good, Rechecked all sensors again and tested good
18. Figured that the computer from the salvage yard was bad or something
19. Ordered a NEW Reman Computer from All Computer Resources in Miami Florida
a. I have purchase several jeep computers from this company over the years and been very pleased with this company
20. The new computer arrived
a. Computer installed
b. NEW CAM Sensor Installed
c. NEW Crank Sensor Installed
d. NEW Map Sensor installed
e. New Coolant Sensor Installed
f. NEW Plugs installed
g. New Coil Pack Installed
21. Vehicle will crank over but not start still.
A. Looks to be over fueling
b. Bucks really bad like the timing is not correct
c. Pops and backfires out the intake
d. Will not run
22. Put the computer from the salvage yard back in the vehicle and it will run sometimes but really rough like it is not firing on all cylinders. I did get it to run long enough that the exhaust pipe between the catalytic convert and the muffler was glowing red. ( Less than 5min)
a. I am guessing that this was from all the fuel that is dumped into the exhaust system from not starting.
I am now at a loss
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Sunday, August 30th, 2020 AT 10:47 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Two questions. First, did you check to see if the catalytic converter is plugged? Also, have you checked the coolant temp sensor?
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Sunday, August 30th, 2020 AT 10:47 AM (Merged)
Tiny
JAMESODOM
  • MEMBER
  • 10 POSTS
The company I ordered it from claims it is the correct one. I have ordered 2 of them and had them programed. I ordered a used one from the salvage yard and had it programed and them I ordered a reman one and it cam programed. Different vendors
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Sunday, August 30th, 2020 AT 10:47 AM (Merged)
Tiny
JAMESODOM
  • MEMBER
  • 10 POSTS
Yes the O2 sensors are removed to just make sure, and the coolant sensor test good and was replaced new also test good
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Sunday, August 30th, 2020 AT 10:47 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Are you getting good spark to the plugs as well as proper fuel pump pressure? I forget if you checked engine compression.
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Sunday, August 30th, 2020 AT 10:47 AM (Merged)
Tiny
JAMESODOM
  • MEMBER
  • 10 POSTS
Yes the fuel pressure is good. No Leak Down either. The Spark is good. Had strong fire and a new coil.
The compression is in normal limits.
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Sunday, August 30th, 2020 AT 10:47 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
If you have good compression, the injectors are getting power, and you have a good spark, the engine should run. Have you checked timing? If you use starting fluid, will it start for a couple seconds?
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Sunday, August 30th, 2020 AT 10:47 AM (Merged)
Tiny
GIRLWEIR73
  • MEMBER
  • 1 POST
  • 2000 JEEP GRAND CHEROKEE
  • 4.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 92,000 MILES
I put this new engine in and it started and ran good for a few minutes then shut down, and will not start. It turns over and cranks, but the anti theft light come on blinks once then stays on. I really could use some help.
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Sunday, August 30th, 2020 AT 10:47 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi and thanks for using 2CarPros. Com.

It sounds like you are locked out by the anti-theft. If you haven't already, try a different key. If that does not work, here is a self test of the system from Alldata. See if it helps.

____________________________

Vehicle Theft/Security System (VTSS) Self Tests
VEHICLE THEFT/SECURITY SYSTEM (VTSS) SELF TESTS
In order to obtain conclusive testing of the Vehicle Theft Security System (VTSS) the Body Control Module (BCM) and all of the electronic modules that provide inputs to, or receive outputs from the VTSS components must be checked. The most reliable, efficient, and accurate means to diagnose the VTSS requires the use of a DRB scan tool and the proper Diagnostic procedures. The DRB scan tool can provide confirmation that the Programmable Communications Interface (PCI) data bus network is functional, that all of the electronic modules are sending and receiving the proper messages on the PCI data bus, and that the BCM is receiving the proper hard wired inputs and relaying the proper hard wired outputs to perform its VTSS functions.

See the proper Diagnostic Procedures and the Vehicle Theft Security System menu item on the DRB scan tool for the procedures.

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO AIR BAGS AND SEAT BELTS/AIR BAGS BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

1. Check the fused B(+) fuse in the junction block. If OK, go to Step 2. If not OK, repair the shorted circuit or component as required and replace the faulty fuse.
2. Check for battery voltage at the fused B(+) fuse in the junction block. If OK, go to Step 3. If not OK, repair the open fused B(+) circuit to the Power Distribution Center (PDC) fuse as required.
3. Check the fused ignition switch output (run' start) fuse in the junction block. If OK, go to Step 4. If not OK, repair the shorted circuit or component as required and replace the faulty fuse.
4. Turn the ignition switch to the On position. Check for battery voltage at the fused ignition switch output (run/start) fuse in the junction block. If OK, go to Step 5. If not OK, repair the open fused ignition switch output (run/start) circuit to the ignition switch as required.
5. Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Disconnect the instrument panel wire harness connector from the Sentry Key Immobilizer Module (SKIM) connector receptacle. Check for continuity between the ground circuit cavity of the instrument panel wire harness connector for the SKIM and a good ground. There should be continuity. If OK, go to Step 6. If not OK, repair the open ground circuit to ground as required.
6. Connect the battery negative cable. Check for battery voltage at the fused B(+) circuit cavity of the instrument panel wire harness connector for the SKIM. If OK, go to Step 7. If not OK, repair the open fused B(+) circuit to the junction block fuse as required.
7. Turn the ignition switch to the On position. Check for battery voltage at the fused ignition switch output (run/start) circuit cavity of the instrument panel wire harness connector for the SKIM. If OK, use a DRB scan tool and the proper Diagnostic Procedures to complete the diagnosis of the SKIS. If not OK, repair the open fused ignition switch output (run/start) circuit to the junction block fuse as require

_____________________________________

Let me know if this helps or if you have other questions.

Take care,
Joe
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Sunday, August 30th, 2020 AT 10:47 AM (Merged)
Tiny
LEGOOD90
  • MEMBER
  • 1 POST
  • 2000 JEEP GRAND CHEROKEE
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 219,000 MILES
I was about to run out of gas, so a friend brought me a couple gallons of what we thought was regular unleaded except it had a fluorescent green color. We put the gas in and I proceeded to drive to work smoking out of the exhaust. I got to work shut my car off, after work I went out to start my car and it won't start got a jump and it won't start. So I walk to gas station thinking that I was out of gas again put seven gallons of good gas in the tank. Car still won't start it just cranks, almost starts and backfires.
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Sunday, August 30th, 2020 AT 10:47 AM (Merged)
Tiny
STEVE W.
  • MECHANIC
  • 13,576 POSTS
From the description it sounds more like the "gasoline" may have been diesel fuel. Most diesel fuels are a greenish color. If that is the case you will need to drain the system and then flush it with good gasoline. The mixed stuff is pretty much useless for anything but will need to be disposed of. You will also want to remove the spark plugs and clean or replace them as they will likely be fouled from the diesel fuel creating a lot of soot and residue.
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Sunday, August 30th, 2020 AT 10:47 AM (Merged)

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