Okay im sure somebody has something on this because i think i read about it 5 or 6 years ago, my wifes 01 excursion (138K miles) sounds like somebody is hitting it with a hammer on the block when its at idle, this goes away once it clears about 900 rpm, maybe a little sooner. Anyhow i am looking for the fix to this but cant remember what it was. I thought it was a bad injector but before i do that i wanted to shoot this out and see what i might be missing. Thanks in advance for the feedback and help.
Question 7.3 sounds like somebody hitting it with a hammer is this injector knock
- Thread starter jherman
- Start date
KRISTOLSON
Full Access Member
Sounds like a bad injector. Any other symptoms? power loss, more smoke than normal? Oil leaks? getting air into hpop system when not running? might just try changing fuel filters, and making sure its not a fuel pressure issue. last injector i had replaced was over 800 bucks w/labor. dont blame you not wanting to jump right into it!
Tail_Gunner
CRJ & ERJ A&P Mech.
Hook a scanner or something capable of doing an injector contribution test. Run the test, it'll turn off each injector one at a time. If the noise goes away momentarily, you've confirmed a bad injector as well as which one it is.
Okay thanks to all, it has no leaks and has no other signs of any problems, fuel mileage is still good and it runs strong, it does idle a little funny, maybe a little more rough than when we first got it, but i have been driving my 6.0 and it is way quieter than her 7.3. Anyway i am taking it to a shop on Monday to get checked out. Thanks again. I dont see the Thanked Tab anymore here on the new forum so i"ll just say it,
DaveBen
SDD Senior Member
The design of the 6.0 is MUCH quieter than the 7.3. I had an IDI 7.3 that was loud and bought my 6.0 because it was so quiet.
Dave
Dave
Nothing in yer Sig about Mods on yer 01.. but if you replace the fuel pump [inlet] QD fitting with a piece of fuel hose ($10) and.. install a cross over oil line ($60) between the oil rails.. doing this will quiet down (cackle) these 7.3's considerably by reducing Air in the fuel, and Equalizing the oil pressure required, to "Pop" the injectors.
Joe
So a little more info on these procedures would be appreciated, i get the concept from your post but dont understand the (what to the what) comment, if you could guide me some more i will look into doing this. And also as far as mods go it has a 4" exhaust and an edge tune for 50 more Horse power, other than that it is stock.