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2010 Grand Cherokee multiple issues


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RyanD2291
Novice

Oct 20, 2019, 4:10 PM

Post #1 of 11 (155 views)
2010 Grand Cherokee multiple issues Sign In

Need some help.
First time posting been using this site for guidance for years. I have a 2010 Grand Cherokee 3.7L v6 with 72,000 miles.

The other day the vehicle overheated and had to pull to side of the road. The radiator had over pressurized and the valve blew. After letting it sit, I could not get it to start. Thought it was the ECT sensor preventing it from starting due to heat. I threw distilled water in it and got it home after it cooled. It appeared to be a water pump leak

Yesterday, i changed out the water pumped ran it around the block a few times and everything seemed good. Later, i take it out to dinner and it stalled at a light. Very little roughness, just kinda kicked out. I started it once and u-turned home. Next light same thing, but i could barley get it to start. Next light, same thing except i threw it in netural to try to keep the rpms up keep it from stalling. It did stall out and I could not get it to start back up. Slight smoke coming out (white vapor) and electrical burning smell coming from power relay box. Engine was within normal temperature range (though slightly higher than normal).

Got it towed home now starter won't crank.
I repaced plugs, wires, coils, and starter within the past 6 months. Heater core went 3 months ago so I did a bypass which is still on. All relays are good and the computer is throwing a p0300 code (general misfire).

TLDR:
-Previously overheated
-Front end coolant leak
-Stalled at idle
-Electrical burn smell
-Won't start, not cranking, all electrical systems work
-p0300 code
-new water pump, coils, plugs, start
-relays are good

Need help on this one.


(This post was edited by RyanD2291 on Oct 20, 2019, 4:27 PM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 20, 2019, 4:16 PM

Post #2 of 11 (131 views)
Re: 2010 Grand Cherokee multiple issues Sign In


Quote
The heater had over pressurized and the valve blew.


Huh?
What on earth are you talking about. Heaters don't create pressure, overheating does.

I'm afraid all your symptoms are pointing to a blown head gasket or cracked head due to the previous overheating.

Sounds like a new motor is in your future.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



RyanD2291
Novice

Oct 20, 2019, 4:30 PM

Post #3 of 11 (121 views)
Re: 2010 Grand Cherokee multiple issues Sign In

Sorry meant radiator.
Thanks for the reply. Even with a blown head gasket, wouldn't the engine still crank? Never experienced a blown head gasket but hoping that's not the issue.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 20, 2019, 4:33 PM

Post #4 of 11 (117 views)
Re: 2010 Grand Cherokee multiple issues Sign In

Not if you kept driving it after it got hot and now the engine seized.

Put a socket on the crankshaft bolt and see if you can turn the engine by hand.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



RyanD2291
Novice

Oct 20, 2019, 4:47 PM

Post #5 of 11 (113 views)
Re: 2010 Grand Cherokee multiple issues Sign In

Just gave it a shot. I was able to rotate the crankshaft pretty easy so it dosen't appear the engine is seized.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 20, 2019, 4:51 PM

Post #6 of 11 (108 views)
Re: 2010 Grand Cherokee multiple issues Sign In

But the engine won't crank on it's own?

Have you checked the battery? Does it make any noises or do anything?


edit
OK, I just saw in your early response that there was electrical burning smell. You're going to have to get that checked to see what that was.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on Oct 20, 2019, 4:52 PM)


RyanD2291
Novice

Oct 20, 2019, 4:59 PM

Post #7 of 11 (102 views)
Re: 2010 Grand Cherokee multiple issues Sign In

Battery is good, less than a year old. Terminals aren't corroded. I'm not hearing the starter at all. I only hear the relays clicking over.

Starter is about 6 months old. I attempted to get it off today to get it checked but ran out of time. Dont know ro check the rest of the ignition system.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 20, 2019, 5:03 PM

Post #8 of 11 (95 views)
Re: 2010 Grand Cherokee multiple issues Sign In

Stop relying on age to determine if a part is good. The age means nothing. You have to systematically eliminate things.

Look around for burnt wires. Maybe follow the smell to it's source.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



RyanD2291
Novice

Oct 20, 2019, 5:13 PM

Post #9 of 11 (90 views)
Re: 2010 Grand Cherokee multiple issues Sign In

You're right with the parts age.
The electrical smell appears to be coming from back of the engine compartment on the drivers side. I ls,

My plan is to change out the starter, coils, and plugs.

If that fails, any other recommendations before taking it in?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 20, 2019, 5:17 PM

Post #10 of 11 (88 views)
Re: 2010 Grand Cherokee multiple issues Sign In

My recommendation is don't simply throw parts at it.

We call that using the parts cannon and the only thing that accomplishes is to empty your wallet.

You need to find the problem and diagnose it correctly.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Oct 21, 2019, 2:36 AM

Post #11 of 11 (66 views)
Re: 2010 Grand Cherokee multiple issues Sign In

IF I read all that right it's not even cranking right now. Find out why first without that famous "Parts Cannon" as testing much of anything is futile till it can crank on it's own. If proven it isn't going to give you choices of your next move up to giving up on this engine not yet determined,


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