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21 RT Crank No Start

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Luisrm02

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Discussion starter · #1 ·
Hi Folks,

Long time lurker, first sad post. My wife was sitting at idle today and her Rango just stopped running. She went to crank it back up and crank but no start. We’ve had the car since September 2021, cranks strong, tried to jump it for the heck of it but nothing. We have 68k miles on her so warranty is done. Towed her home…$317 poorer.

Once I got it home, sprayed carb cleaner in the throttle body and it started then of course stops once I stop spraying.

Digging through old posts I checked the passenger side body harness plug and it looks good, nothing melted. F70 looks fine, tested for continuity all good. Popped my meter on and had her start and I get in the 10+ volts then when it stops cranking it bumps back up between 11.96 to 11.98 volts. Swapped the relay and same issue. Pulled the fuse box and c25 felt fine, wasn’t loose or anything. Didn’t check the voltage, was getting late and starting to rain.

Would super appreciate any assistance and thank anyone in advance, would hate to take it to the dealer just to have them start part swapping at my expense. Tough to believe it would be a bad fuel pump with less than 70k miles but mechanical parts, anything is possible I suppose. 🤷‍♂️
 
#4 ·
If it starts with starting fluid, you have a fuel delivery issue. Can you hear it prime when you do cycle the start button without a foot on the brake pedal? If it still won't start, try thumping the fuel tank a couple of times on each side, then try to start it. If it fires, up. strike 2 on the fuel pump.

FYI, I seem to recall a small number of '21 D owners who experienced early fuel pump failure. It's a shame you are just out of warranty.

Don
 
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Discussion starter · #5 ·
So, just went outside and didn’t hear the pump prime and banged both sides of the tank but nothing. It’s so odd for it just to cut out at idle and nothing after. I know mechanical devices fail but man, usually pump will crap out a little and effect drivability some bogging, then cut but this thing was just instant off and doesn’t even try to send fuel. I guess I’m trying to eliminate anything else first since getting to the pump is more than ridiculous. Why dodge couldn’t have popped in an access port…well nevermind, cost them 20 bucks in parts and then I guess they can’t get over 1 to 3k for a repair. Pretty crappy to think the pump could be dead after less than 5 years and under 70k if the pump ends up being the culprit.

Is there anything else I should be looking at?
 
Discussion starter · #6 ·
Luisrm02 said:
So, just went outside and didn’t hear the pump prime and banged both sides of the tank but nothing. It’s so odd for it just to cut out at idle and nothing after. I know mechanical devices fail but man, usually pump will crap out a little and effect drivability some bogging, then cut but this thing was just instant off and doesn’t even try to send fuel. I guess I’m trying to eliminate anything else first since getting to the pump is more than ridiculous. Why dodge couldn’t have popped in an access port…well nevermind, cost them 20 bucks in parts and then I guess they can’t get over 1 to 3k for a repair. Pretty crappy to think the pump could be dead after less than 5 years and under 70k if the pump ends up being the culprit.

Is there anything else I should be looking at?
Click to expand...
Going to take the backseat out to check the power to the pump.
 
#7 · (Edited)
Luis:
Such things can and do happen. Checking power to the pump is a good step. If you have it, and the pump no worky, it's time for a new one. As I mentioned, I think Dodge had a bad parts run with fuel pumps in the '21 model year. We had a much larger problem with the 5.7/6.4L water pumps from '13-'17. It was so bad, the oem part(s) were on national backorder, and Dodge extended the warranty on those pumps to 7 years and unlimited miles.

Unfortunately, if the pump is bad, the exhaust, rear driveshaft, and tank have to come down. Oem is recommended.

Don
 
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#10 ·
I've not had the issue, so can't advise on that. Plenty of folks here have though, and hopefully they will chime in. There are online links to manuals from libraries that can guide you.

Don
 
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#12 ·
2021 was a bad year for fuel pumps in Durangos. May no start conditions then all of a sudden it starts or poor power and hesitation.
I have a 21 also and thought I skated the problem but it looks like they break fairly new or die after a certain amount of long term use.
 
#17 ·
The driveshaft is one piece with a carrier bearing in the middle.
 
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#18 ·
Vice-White said:
2021 was a bad year for fuel pumps in Durangos. May no start conditions then all of a sudden it starts or poor power and hesitation.
I have a 21 also and thought I skated the problem but it looks like they break fairly new or die after a certain amount of long term use.
Click to expand...
Has anyone made a list of issues like this one? That would be extremely helpful if someone did.
Buying a 21 model year used only have the fuel pump go out on you would kinda suck. This could be something that one could look into to see if it was replaced or not. If not and your buying a 21, I would just buy one and replace it anyway to avoid getting towed.
 
Discussion starter · #20 ·
Vice-White said:
2021 was a bad year for fuel pumps in Durangos. May no start conditions then all of a sudden it starts or poor power and hesitation.
I have a 21 also and thought I skated the problem but it looks like they break fairly new or die after a certain amount of long term use.
Click to expand...
Are the newer units more reliable? Now that I’ve got everything out I’m looking at the Mopar parts and wonder if they are revised and reliable now or is it worth looking into a different brand. Also while I’m in there I’m gonna go ahead and change the auxiliary unit since this was “fun” I don’t want to have to do again anytime soon. Thoughts?
 
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Luisrm02
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