1995 7.3 popping noise? help!? - Ford Powerstroke Diesel Forum
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Old 01-13-2014, 01:45 PM
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1995 7.3 popping noise? help!?

hey hows it going today guys i recently discovered this great wonderful popping noise coming from the intake of my 1995 f350 7.3 the motor has 260k on it, it comes and goes (the noise) it isnt always popping but does once in a while it seems if i run injector and upper cylinder cleaner threw it, it clears it up but its driving me crazy it has a stage 2 afe intake banks quick spool wheel tranny inter cooler on it few other mods here and there but no chips or anything like that the truck runs great i mean tons of power for being on 35's and a cclb doesnt smoke or anything i took a video for some help please i would appreciate some one to shed some light on me
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Old 01-15-2014, 05:49 PM
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you posted this in the wrong spot but thats fine.

your probably hearing injector knock.

you can see if synthetic oil calms it down and running fuel additive might help.

ps cant hear anything unusual in your video just a 7.3 idling
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Old 01-16-2014, 07:29 AM
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maybe im going crazy then thats the thing u only hear it at idle, start driving it goes away like i said it comes and goes
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Old 01-17-2014, 08:31 AM
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The most likely cause is fuel cackle or injector noise. The fact that cleaner seems to make the sound go away for a time would also suggest possible carbon build up on the piston top. This carbon could, over time build up to the point where the compression in a particular cylinder is higher and could make a different sound that way, or even contact the cylinder head, causing a knock. In either case, running cleaner multiple times to clean the piston tops, or a little K1 in your fuel tank to clean things up, may help as well. If it gets worse, it may be time to take it somewhere qualified for diagnostic.
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