eec relay and fuel pump relay ?

[Psychopete]

Did you try and bypass it to make sure that is the problem, before ordering the new switch?

 

[windwsxpbronco2]

Not yet, Im driving the Audi right now...but I'll be driving the truck tomorrow to pick up a dryer. Ill shove a paper clip in the harness before I leave

 

[Psychopete]

Not yet, Im driving the Audi right now...but I'll be driving the truck tomorrow to pick up a dryer. Ill shove a paper clip in the harness before I leave

Do it, it's cheap insurance to make sure you're fixing the right part

 

[windwsxpbronco2]

Yeah, and it's not the switch...ugh. Bypassed it, still stalled out about 4 times within 120 miles of driving. Next thing, get an electronic fuel pressure gauge along with some dummy lights coming directly off the power side of the pump. It never hurts to have one, and it will let me know for a fact if its the pump or a broken/corroded/frayed/burnt wire. Let the fun begin :/

 

[windwsxpbronco2]

A narrow band air/fuel ratio gauge would be nice as well

 

[kimcrwbr1]

It would be a good idea to put dielectric grease on all your electrical connections as you put them back together to protect them from future corrosion and take a small screwdriver and make sure all the individual connectors are pushed all the way in also.

 

[windwsxpbronco2]

It would be a good idea to put dielectric grease on all your electrical connections as you put them back together to protect them from future corrosion and take a small screwdriver and make sure all the individual connectors are pushed all the way in also.

Already do, but thanks!

 

[79F1504X400]

You said that your FP relay wasn't getting ground.

Where is the FP relay ground at?

Do the fuel injectors use the same ground as the FP relay?

I see this is a few days old, but I'll give it a go. The ground for the FP relay should be the spade connector right next to the battery.

 

[Bill in Arizona]

I have a similar problem. My in-tank pump is not running when I turn the key on. I changed the ig switch, relay, jumped the inertia switch, Checked every fuse, and link. There is no pwer at the blk/pnk wire. I can put a jumper wire on the green relay and make the pump run. The truck will run and drive. I do have a code 87 , primary pump failure code. I ordered a relay base. Any ideas what I should do next?

 

[compaqeo]

I have a similar problem. My in-tank pump is not running when I turn the key on. I changed the ig switch, relay, jumped the inertia switch, Checked every fuse, and link. There is no pwer at the blk/pnk wire. I can put a jumper wire on the green relay and make the pump run. The truck will run and drive. I do have a code 87 , primary pump failure code. I ordered a relay base. Any ideas what I should do next?

if that is what makes the pump run you could always toggle switch the fuel pump like race cars

 

[mange1234]

Thanks for information on fuel electrical system.

It should run for two seconds everytime you turn the key off and back on (as you mentioned)....otherwise I'd say you have an intermittent problem. As it was posted a few threads back, check all the wiring and connectors associated with the FP. I had similar issue....No priming at all to be exact. Found out the FP relay wasn't getting ground and also had a frayed wire down on the Hi-press. fuel pump. Its been covered alot about the importance of the grounds doing their job. Check all the grounds that you can find and clean/repair them. Good luck and keep digging.

Thanks for the information. I am having electrical probs in fuel system. And, after reading this, think the first step will be to check out the wiring and proper ground.

Mike Ange,
Virginia Beach

 

[bmxr123]

was this problem ever solved? I have the same issue..Bypassed the inertia switch, new relays, new pcm..?????!

 

[NEALD]

Update?

Also curious to know if this was solved

 

[Spott]

Also curious to know if this was solved

This thread is 7 years old. It's possible that the OP may not even own that vehicle or visit these forums anymore.

If you have a problem and are looking for help, it's best to start your own new thread with a complete description of the problem, the symptoms, what you've tried, and what changed when you did those things.