nevermind;

[teamsmith]

Sorry to have all these different threads going, but I'd rather keep my issues separate if that's ok. This week I installed 6 rebuilt Bosch 702 (same as 703) from a Volvo to replace my leaky injectors. All went well, idle is better and throttle response is possibly improved off the line. However, I just noticed that the fuel pump (droning) comes on a stays on after driving for a few minutes (it does not come on/ stay on immediately when starting or on take off) and does not go off until I turn the truck off (even when I slow to an idle). Also, acceleration has sputtered a couple times from 2000-3000rpm while under load, like it's getting choked. I have not tested the regulator/rail with a gauge, but that will be on my list. Of the relevant components I have replaced the following with new:

Fuel tank

Fuel pump

Fuel filter

injectors

air filter

spark plugs/wires

 

Thoughts? the sputtering makes me think my 'rebuilt' injectors are bad but I don't understand why the fuel pump would run and run, even at idle, unless my relay is blown or my regulator is stuck in whichever position calls for more pressure. There are no visible leaks.

 

 

 

 

[Minuit]

Is it possible your fuel pump is just loud? Mine is loud as hell sometimes (and silent other times) but it works fine. What brand of fuel pump did you use? I used the crappy Airtex pump when I replaced mine in 2012. For a while it was really noisy after a few minutes of driving but after a few months it mostly quieted down.

[teamsmith]

it's the cheap one from autism-zone. I replaced it in the summer and it maybe has 400 miles on it. It's just odd that I never noticed it before; It is really loud. I guess I didn't realize that it ran continuously even at idle (although, now that I type this, I don't know why I thought that). I am stopping by the zone tonight anyway so I'll borrow a gauge to check the rail pressure to make sure all is well.

 

Thanks.

[big66440]

I have an Airtex pump myself and it does what minuit's pump does, sometimes its noisy and other times its quiet but as far as fuel pressure readings go it's dead on.

[teamsmith]

great. thanks. I guess I was just ultra-sensitive to fuel supply issues with the addition of the 'new' injectors. Now on to the next issue. :)

[richasco]

teamsmith,

Here is a link that you should follow and spend some time reading, I think it will help you understand things a little better.

 

http://www.autismspeaks.org/

[Minuit]

:thumbsup:

[teamsmith]

teamsmith,

Here is a link that you should follow and spend some time reading, I think it will help you understand things a little better.

 

http://www.autismspeaks.org/

Thank you. I saw the Temple Grandin movie on HBO; which was enlightening. Although I'm not sure from what angle your post is coming from, I realize that I should take more care when choosing my words. I apologize for anyone I may have offended.  If anyone should be called names it's me for thinking the fuel pump turned off while at idle.

[dasbulliwagen]

Where I'm at we call it Vato-zone. I hope I don't have to explain that.