2002 Tundra V6 - Possible Fuel Pump Issue?

Hi -

I have a 2002 Tundra V6. My truck just completely died while driving one day. I towed it to the Toyota dealer - they diagnosed it - but they are not 100% sure of the issue. They actually got it started again without doing anything to it. They did see that the spark plugs were not getting fire when they were unable to start it.

They are recommending a new fuel pump, fuel filter, fuel regulator - however, they told me they were not 100% sure that is the issue. When I picked it up from the dealer - it started - then I drove it about 10 miles - and then it died again while driving down the road at about 50mph.

I am curious as to why the truck spark plugs would not fire? Does that sounds right if the fuel pump is bad - is the ECU smart enough to know that the fuel pump is bad - thus no fire?

Any suggestions and thoughts are appreciated!

 

I have a 2006 double cab... and this used to happen to me, i did change out the fuel pump, which corrected the problem, but after maybe 6 months, it happened again.... then I changed out the fuel pump relay, havent had any issues yet.... I suggest changing out the fuel pump relay first (inexpensive part). then if the issue continues you might have to look into changing out the fuel pump.... check back in & let me know how it goes!

 

I can't seem to find the fuel filter for sale anywhere. Anyone have a link to one I can purchase?

 

Thanks for the response! Do you have the v8 or v6? From what I understand - the relays are setup differently.

 

I have discovered the relay at the parts stores are around $32 but Amazon has it for $8 for the v8. Just fyi

 

"It drove 10 miles then died" I assume you drove it / towed it back to the dealer for a proper diagnosis / repair as you probably just spent a lot of money not to fix the actual problem.

 

Sounds like stealer was ‘recommending’ that work performed and maybe Bradshaw declined and drove it off. Hopefully, its the relay as TVU suggests.

 

Ok recommendation only got it. I don’t know how the dealerships in his area operate but our dealerships charge a diagnostic fee around $150 minimum. No spark but they suggest a fuel pump I would direct you to another repair facility. No spark - any codes? Did they give any diagnostic info on the repair order? ECM needs info from the crank & cam sensors etc to trigger the coils. Coils need a power supply as well as the ECM trigger.

 

They want a $139 around here to diagnose. I’d gladly pay it, but in this case no guarantees on the diagnoses? Fuggetaboutit!

 

I have a V8!

 

UPDATE: So I had the fuel pump replaced. NOTHING wrong with the old fuel pump - we tested it on the battery terminals and ran fine. So $325 down the drain. AFTER we replaced it - I saw the 15 amp EFI fuse in the engine bay fuse box had been popped. Replaced it, and BOOM - engine started!

Drove it for about 30 miles and thought I was good - THEN...it died on me again! SAME 15 amp EFI fuse popped again...I had a few spares - but everytime I cranked the engine - it kept popping.

I have ready on the forums about this EFI fuse - and it looks like if a O2 sensor can have faulty wiring and can do this exact thing. AND - I actually have an O2 sensor fault that started just before all of this started happening - so things are starting to come together hopefully.

I am traveling this week - but when I get home - I am going to check out that O2 sensor to see if some wires are faulty.

As always - any suggestions are appreciated. I am just glad I didn't drop $1600 at the dealer to replace ALL of the stuff they wanted me to replace (fuel pump, fuel regulator, fuel filter, etc).

 

This diagnostic procedure is quite blotchy. The blown fuse occurred after the fuel pump replacement? EFI 1 fuse feeds the EFI and C/OPN relays which power the fuel pump.

 

Agreed. No - it had to be blown before. This also makes sense because we weren't seeing fire when I initially took it to the dealer. The issue was never the fuel pump...something is popping the EFI...I just need to chase that down.

 

"I towed it to the Toyota dealer - they diagnosed it - but they are not 100% sure of the issue. They actually got it started again without doing anything to it"

If they in fact did nothing but it started where does the blown fuse come into play prior to the fuel pump? EFI 1 fuse has multiple branches as part of the "engine controls system". I'd start w/ a fuel pump power distribution check first meaning checking the circuit for a short to ground or a fuel pump drawing more than 15amps. A wiring diagram is a must - BLK/Red wire is the color to focus on.