Large gray relays under hood fuse box some 180 deg off from rest

[Marty_S]

Sunday, 1/19/25, 03 Denali was fine for about an hour of driving. Stopped at friend's house, wouldn't start. Crank but no start. I am not sure if it fired with ether sprayed into air cleaner box. Will check if he remembers it catching. While looking for wires not connected, I noticed some of the large gray relays facing opposite direction. About 50/50 and not sure they work when not all oriented the same. Yukon is still stuck at his house so don't have a relay for reference. The direction of relay should all be the same so can read them? Yukon, 98 Audi Quattro, 91 MR2, 98 Landy Disco have had paint peeled by jerk brained vandal at my home on ranch and at Mom's home in town. Not at point of pushing creeps OFF button yet as dislike of cages stops me.

 

[Scottydoggs]

them relays point all over, left right up down, its how they are made.

id start with checking if you got fuel pressure. turn key to run, find the cap for the shrader valve on the fuel rail and push the pin, gas should spray out like 2 foot high, ( so watch your eyes) if it only dribbles out the fuel pump is dead. or screw a mech gauge on the valve, turn key to run, should hit high 50 psi.

 

[rockola1971]

Relays are keyed. You cant put them in backwards. If it drove there with the relays as is then it aint the relays installation causing the problem. This sounds more like a fuel pump dying as mentioned above. Can you hear it come on for about 5 secs when key is turned to the run position?

 

[89Suburban]

Punch the bottom of the r fuel tank with your fist or a mallet

 

[dps01]

Punch the bottom of the r fuel tank with your fist or a mallet

… and if it starts replace the fuel pump ASAP…