Noise in engine bay

[jdb03]

Hey i have a 94 Sport 4x4 and when you accelerate sometimes it makes a knocking noise in the engine bay and another weird noise, i'm thinking the other noise has something to do with my exhaust though, any help would be appreciated though, thanks

 

[kaised]

Sounds like engine knock - I have a weird noise too, it sounds like air escaping from somewhere but I haven't had the change to look... whats the easiest way to check for an exhaust leak?

 

[TPLYNCH]

Can you be more specific about the sound?? Is it at certain RPMs or is it constant? Do you hear it at idle?

 

[jdb03]

I mostly hear when it is higher than 3000 rpms, or i'm at highway speed trying to pass or just accelerating faster.

 

[MrShorty]

Sounds like spark knock aka "ping". Seems to be common to these 4.0 OHV engines. lots of potential fixes, do a search for ping and see if you find something to help you.

 

[DarkFox1]

hrm, ya that does sound like a ping.. does it do it at idle? or seem to be temperature related? I know my truck clicks when it hasn't ran for long.. you can hear it all the way up to highway speeds and is 100% related to rpms.. but I am unable to locate where its coming from..

does tha tsound familiar or would you not describe it that way?

if yours is a ping.. you may want to try changing your gas brand, or octane to see if it goes away, I didn't read all the other posts but someone else has problablly said this already

 

[TPLYNCH]

Try cleaning your MAS http://www.explorerforum.com/forums/showthread.php?threadid=56770&perpage=25&pagenumber=1