Timing + Belt Tensioner
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Timing + Belt Tensioner
hello!! i'm new to diesels, but i'm definitely hooked.......
92 E-350 7.3L IDI
straight to the point, i have two questions:
1. Is this a timing problem?; the past week i've noticed a slight, low-pitched knock for about two seconds when i accelerate from idle, kinda like when a motor is "dieseling" or stalling out, and it's been getting more frequent (everytime i accelerate). I've also noticed it's not running as smooth as when i first got it, dark smoke comes out on random accelerations, and it's randomly harder to start than other times. The change happened when a very questionable mechanic swapped out the IP, this guy was truly a dolt, he left a few things loose and was in a hurry. Thats why i suspect something related to the IP. -NOTE-i have checked all the fuel lines for leaks, and the air/fuel filters are on tight.
2. Do i need a new belt tensioner?; my belt tensioner is bouncing up and down a bit causing the belt to "chirp" on the pulleys (all the pulleys "seem" fine, i don't see any of them wobbling or not wanting to turn)
Thanks for any of your wisdom you can share, i'm so thankfull for these forums!!
92 E-350 7.3L IDI
straight to the point, i have two questions:
1. Is this a timing problem?; the past week i've noticed a slight, low-pitched knock for about two seconds when i accelerate from idle, kinda like when a motor is "dieseling" or stalling out, and it's been getting more frequent (everytime i accelerate). I've also noticed it's not running as smooth as when i first got it, dark smoke comes out on random accelerations, and it's randomly harder to start than other times. The change happened when a very questionable mechanic swapped out the IP, this guy was truly a dolt, he left a few things loose and was in a hurry. Thats why i suspect something related to the IP. -NOTE-i have checked all the fuel lines for leaks, and the air/fuel filters are on tight.
2. Do i need a new belt tensioner?; my belt tensioner is bouncing up and down a bit causing the belt to "chirp" on the pulleys (all the pulleys "seem" fine, i don't see any of them wobbling or not wanting to turn)
Thanks for any of your wisdom you can share, i'm so thankfull for these forums!!
Last edited by dieselcanuck; Sep 8, 2004 at 10:17 PM. Reason: needed to add engine model
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Problem Solved......
seeing i'm new to diesels, i just learned a good lesson; all my problems led to a bad injector that was completely closed, except when i stepped on the gas. in idle the pressure would drop, and the bad injector would stop pulsing. on acceleration, the sound in the piston was that of one with no fuel in it (a knocking sound) until the pressure was enough to force the injector open again.
this problem was causing the motor to run rough and tug on the belt tensioner creating belt slippage.
replaced the injector, runs like a champ.........
this problem was causing the motor to run rough and tug on the belt tensioner creating belt slippage.
replaced the injector, runs like a champ.........
Thread Starter
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New User
Joined: Aug 2004
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yep....exactly. start with the simple stuff and go through the checklist before throwing out the engine, right?
i'm still getting a little unburt fuel coming out the exhaust, i hope i tightened the injector down properly (didn't use torque wrench, just tightened to snug). i'll do another injector test and see if any other injectors are acting up........
i'm still getting a little unburt fuel coming out the exhaust, i hope i tightened the injector down properly (didn't use torque wrench, just tightened to snug). i'll do another injector test and see if any other injectors are acting up........
Posting Guru
Joined: May 2004
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From: Prince George, B.C.
yeah, they should all change the way it idles about evenly. I have no idea what the torque specs are for the injectors but then again, i usually just tighten everything except heads till I think its good enough.
