fuel pump

[06 H3]

Who here has had a fuel pump go out on your 3?

This morning crank and nothing...good thing this happened AFTER my 300 mile trip. I go to work in another car, come back later and thinking hmmm how can I have engine swap issues 1200 miles later. You would assume it would be instant. Check the fuel pump fuse and relay both good. unplug the 2 connectors at the tank they are getting power (10v) not a full 12 but maybe the battery is a little drained from the cranking multiple times? Fuel pump is dead. lasted me 10 years....

Going tomorrow AM to pick up the pump from Zach, avoiding traffic tonight, water is falling from the sky in California and suddenly people cant drive for ****.

Just seems like luck has it that the fuel pump decided to die today. Kinda random....How long are these things supposed to last? H2s are older have u guys swapped em yet? Overall I dont think its engine swap related I am just trying to make sure. Also I checked 5cyl and v8 use the same pump.

Lastly its a PITA! I almost have the tank dropped been doing it in the rain and in the street We really need to frame rail mount a small pump like the old school setups were. Small and cheaper and easy to replace.

 

[06 H3]

also disconnected the fuel line and no fuel coming out the line when cranking it.

 

[Best4x4]

Yeah fuel pump swap out's on a H3 are not nearly as simple as a Land Rover RRC/D1. Just lift carpet, remove floor cover plate, disconnect fuel pump, and remove. I just replaced the fuel pump in my 98 D1 with a 92 Camaro Z28 fuel pump for 66.00 including the strainer (Land Rover wants between 350-500.00 for the AEL Equipped D1's). Found the info on using a Chevy fuel pump, and it was almost 99% the exact same. Just had to use fuel injector line vs the OEM flexible line.

Fuel pumps normally last to up to 10 years/100,000 miles depending on fuel, and if it was ran almost empty which allowed the pump to run hot. My 98 D1's fuel pump was still working, but I wanted peace of mind vs having it go out. I was done with the D1's in 30min. I don't look forward to doing it on an H3, but with the tank almost empty it shouldn't be to bad (replaced several Jeep fuel pumps).

Post back on how it works out for ya.

 

[chaos254]

I would have just swapped the pump. They make you buy a whole new housing when its not necessary. You can pickup a walbro or hfp for about $70. I did this in my ranger when everywhere wanted $250+ for the housing/pump

 

[06 H3]

I already got one from Zach will pick it up tomorrow but his price was wayyy better then orielly at over 500 bucks, **** that!

I may pick up a pump and put it in my old assembly. I didnt see one for an H3 though.

 

[CaseyS]

Damn, I have my old pump somewhere. I'm obviously not using it anymore. You could have had it.

As best as I can tell the i5 uses a return less system. Does the v8 operate the same way? Better check.

Also, this will very likely not be the first debugging you do on the swap. Not to rain on your parade

 

[06 H3]

Thanks, I appreciate the offer.

The I5 is returnless in 06 but in 07 or 08 they went return style. I know other Colorado guys with returnless style still stay that way with a v8.

It's ok, lol I know issues always arrive just wishful thinking, we can dream can't we?

 

[3Hummers]

Never replaced a fuel pump on an H2 or the H3. Lift pumps on H1s go out every 2-3 years but they are easy to replace.

 

[Cyouincourt007]

My 08 with 109k mikes on it has the fuel pump on its way out to pasture. While looking for the source of a weird noise we noticed it's starting to kinda whine and is not heard running when I crank it up. Might explain the rough idle I get sometimes when starting it up as it seems like it's goiing to stall out and starved for fuel.
i wasn't aware it can be changed from inside the vehicle floorboard...thought we have to drop the tank to change it out.

 

[Zach]

My 08 with 109k mikes on it has the fuel pump on its way out to pasture. While looking for the source of a weird noise we noticed it's starting to kinda whine and is not heard running when I crank it up. Might explain the rough idle I get sometimes when starting it up as it seems like it's goiing to stall out and starved for fuel.
i wasn't aware it can be changed from inside the vehicle floorboard...thought we have to drop the tank to change it out.

You have to drop the tank. Think he was talking about a previous vehicle.

196k on mine and original one, but I never run it to empty. Had the level sensor replaced years ago. When you run it to empty, they tend to heat up. Will probably replace mine soon just to do it. After all, I did acquire two spares.

 

[06 H3]

Sorry I spoke to 04coly he said they are both the same returnless

 

[CaseyS]

Here is a pic of my old pump



The pump itself is a UNISIA C17E000.

I could not cross reference that on the web anywhere. I did find some on alibaba

http://www.alibaba.com/showroom/c17e000.html

$15 ea min order of 3. Who wants to volunteer to order?

 

[chaos254]

Casey just use a universal walbro pump(255)

 

[cna]

would the walbro pump be a direct fit ?

 

[scoreh3]

How about one out of a Colorado from a wrecking yard ? There's lots of crashed colorados out there . Now that I think about it , I probably should have snagged the one out of my son's Colorado when it got totaled ( it wasn't his fault , but his SMP prerunner bumper held up and it totaled the Tahoe that caused the crash ) .

 

[06 H3]

Heres an update. I havent touched the truck at all the past few days, between graduation, work and lack of sleep I tried not to think about it. So I installed my new fuel pump nothing. I tested my old one and it still works. Between testing all the electronics I thought it was the pump. I then used a multi meter and set it up on OHMs, the wire is a 4 wire plug. 2 grounds a purple wire that goes to the PCM and a gray wire that goes to the fuse box. The 2 grounds zeroed out to the frame so that rules out the ground, the purple wire I had spliced in to the new connector maybe that? Checked it and it zerod out (atleast I know that my electrical work has been fine) then the gray wire has .75 on OHMs so there is some resistance. What baffles me is that the gray wire has never been touched in its existence. It is a factory wire I never touched during the v8 swap and why would it randomly cause issues. ****IN WEIRD and irritating.

Now I gotta track that down. I tested it from the relay to the connector itself. I also ran the new pump off the battery and it works...

 

[CaseyS]

Attach a jumper to the ground leg of the fuel pump relay. Plug it in and with the key on, ground the relay and see if the relay pulls in and that also the fuel pump comes on.

 

[06 H3]

Thanks I will try that, out of curiosity do u think this is engine swap related or a a fluke?

 

[bebe]

My suggestion is to contact Wayne Hartwig at P4x4. He' and his partner are masters of all things GM, wiring and computers.

waynehartwig at msn.com

http://www.pirate4x4.com/forum/members/waynehartwig.html

Send him a link to your pirate thread and he'll take care of you.

 

[06 H3]

Thanks bebe, I sent him an email.

Frustrating, reason I asked if it was v8 swap related because it's tough to find out where to start. Look at factory things or swap related things. The reason I want to believe it is not v8 swap related is because I put 1200 trouble free miles on it then it randomly decided to stop, I feel like it would have given me an issue from day 1 if it was v8 related

 

[bebe]

That could be true, but my instincts tell me it could be a sensor issue, and as long as they stay within the required range, they won't trip a code, but they can fail. Sensors suck

 

[CaseyS]

Start by troubleshooting the relay. If the relay is not pulling in, its ecu or possibly harness or connection related. If the relay is pulling in, it is power circuit side related. Could be as simple as a loose connection at the fuse box.

Also, if you don't have a set of schematics marked up for your setuo, get with Jamie and do it now while things are still fresh. You need them now to troubleshoot this problem and you will eventually need them again in the future.

 

[06 H3]

an update:
I used a multi meter and checked for continuity from the pump back. I then found I have continuity all the way up to the terminal but at the terminal I do not have continuity. The relay terminal is damaged. Best of all the relay terminal is not fixable. I tried to fish it back with a pick but I couldn't. It's frustrating but I can happily say this had nothing to do with the v8 swap. I have a new fuel pump even though my old one was still fine. I just over troubleshooted.

Its frustrating, I am getting tired of the down time but it is what it is. I'm just happy this was not a v8 swap problem.

 

[06 H3]

It runs! Stupid fuse box connector was weak. All that work for nothing, best of all it wasn't touched from the v8 swap

 

[5gn-h3t]

Be happy you live where it is warm. I went to check a fuse in the middle of winter and the top of my fuse box disintegrated when I pulled it off. The fuse boxes are made of junk and I can not believe we don't have more problems. (knocks on wood)