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Dave Nova
Dave Nova, Cadillac Technician
Category: Cadillac
Satisfied Customers: 1522
Experience:  ASE Master Certification. GM World Class Certification
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2010 dts 4.6 fuel pump relay over heating has 60 psi fuel

Customer Question

2010 dts 4.6 fuel pump relay over heating has 60 psi fuel pressure
Submitted: 5 months ago.
Category: Cadillac
Expert:  Wayne Crawford replied 5 months ago.

Hello. My name is ***** ***** I will be helping you today.

What lead up to you noticing this hot relay?

Customer: replied 5 months ago.
Relist: Other.
not there went of line
Customer: replied 5 months ago.

anyone there

Expert:  Wayne Crawford replied 5 months ago.

Judging by my reply to you 17 minutes ago requesting more information I would say yes, I am here.

Customer: replied 5 months ago.

shut down last night wentback later started shut down 45 min later checked fuse ok relay hot bought new relay same thing

Expert:  Wayne Crawford replied 5 months ago.

OK so the car will not start, but it has 60 PSI fuel pressure and you feel the relay is too hot, correct?

Customer: replied 5 months ago.

runs till relay shuts down

Expert:  Wayne Crawford replied 5 months ago.

Relays do not shut anything down unless they are bad. What is making you think the relay is shutting it down?

Customer: replied 5 months ago.

its getting hot

Expert:  Wayne Crawford replied 5 months ago.

How hot?

Expert:  Wayne Crawford replied 5 months ago.

Get the temperature on that and a nearby relay that also has a constant load on it for comparison.

Customer: replied 5 months ago.

can touch one next to fuel relay fuel relay gets to hot to touch

Expert:  Wayne Crawford replied 5 months ago.

I need to know the temperature in degrees. I dont ever trust a finger thermometer. It has a constant 20 amp or so load. I expect it to be hot to the touch. What I want to know is if its so hot it doesnt work. Ive never seen a relay cause an issue of this sort.

Customer: replied 5 months ago.

melting black plastic on it that's hot

Expert:  Wayne Crawford replied 5 months ago.

How many amps is the fuel pump drawing through the relay?

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