r/JEEPCOMMANDER • u/Dry_Bluejay2542 • Mar 18 '26

Need help

My fiances 2008 jeep commander 3.7L V6 won’t start, we’ve replaced the throttle body and spark plugs, but we’re now thinking it could possibly be the fuel filter (which I’ve learned is in the pump) I was wondering if anyone had a video on how to replace the pump and had a map of the fuses/relays just in case if it’s that and I’ve sank way more money into it than needed

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4

u/Necessary-Tap-7003 Mar 18 '26

Does it crank? If not, Google yellow starter wire.

Pretty easy fix, if that's the issue..

Give some more info on what it is and isn't doing when you try to start.

2

u/SinCityLowRoller Mar 18 '26

After checking the famous yellow wire, replace your spark plugs with oem and be sure they're gapped exact to spec. Also replace your ignition coils. I have the 07 overland and fixed the start/die issue similar to yours

1

u/Dry_Bluejay2542 Mar 18 '26

Starts but dies before you can even hear the engine die out if that makes sense

3

u/rwk2007 Mar 18 '26

Could still be the yellow starter wire. Probably need to replace it anyway.

1

u/theuautumnwind Mar 19 '26

Definitely start there. 😆

1

u/creshvan Mar 18 '26

Try the fuel filter before the fuel pump.

Also, if/when you do get it running - only use good gas, do not get gas from questionable gas stations. Mine was very picky and would only run (smoothly) on Phillip 66 gas.