injector knock?
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Elder User
Joined: Dec 2011
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From: Kodiak, Alaska
injector knock?
So I picked up an 88 idi with 200,000 miles it has a new injector pump and injectors on it it is very loud compared to my other two trucks, is that injector knock it almost sounds like a powerstroke it has a distinctive "clack clack clack" sound instead of the smothed out sound I am used to hearing from an IDI engine. Any ideas? And what can I do to quiet it down?
Posting Guru
Joined: Jul 2004
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From: West Valley Utah
Injection pump too far advanced will make the powerstroke rattle. Lines on the pump and housing are not actual timing marks. They are a general if you line these up you should be close enough to start kind of marks.
Rebuilt pumps can make it more difficult to time depending on how the internals were set up. One pump might need timing retarded, another may need advanced a bunch. No hard set rules on the marks alone.
Rebuilt pumps can make it more difficult to time depending on how the internals were set up. One pump might need timing retarded, another may need advanced a bunch. No hard set rules on the marks alone.
Fleet Owner
Joined: Jul 2006
Posts: 20,394
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From: Mi'kma'ki
thats what im thinking too mistaken.i think he's found a truck properly timed and not used to the sound.
hop in it and go for a ride idi guy.odds are besides the extra rattle compared to your other two,she'll have a bit more spunk to her.
an injector knock won't be mistaken for diesel rattle.it'll sound like a rod knocking and scare the ...... out of ya.
hop in it and go for a ride idi guy.odds are besides the extra rattle compared to your other two,she'll have a bit more spunk to her.
an injector knock won't be mistaken for diesel rattle.it'll sound like a rod knocking and scare the ...... out of ya.
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Elder User
Joined: Dec 2011
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From: Kodiak, Alaska
Rattle does discribe it better. Yeah she does have a bit more pep than I am used to I thought it was the zf5 trans but you are probably right it almost seems like it has a powerband at 1750-2000 rpms and she gets it. Thanks guys you put my worry to rest. My 92 is real sluggish do you think I can advance the timing on it a couple of teeth to get more spunk?
Fleet Owner
Joined: Jul 2006
Posts: 20,394
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From: Mi'kma'ki
yes.they shouldn't sound like a big block gasser.
do this to your E40D truck first:
https://www.ford-trucks.com/forums/1...ions-only.html
then try this next:
https://www.ford-trucks.com/forums/3...ml#post9927448
then that '92 will have the upper hand over your '90.
unless you got big tires and stock gears,and non turbo.then there's only so much hope getting them to compare.
you'll like the gains though.
do this to your E40D truck first:
https://www.ford-trucks.com/forums/1...ions-only.html
then try this next:
https://www.ford-trucks.com/forums/3...ml#post9927448
then that '92 will have the upper hand over your '90.
unless you got big tires and stock gears,and non turbo.then there's only so much hope getting them to compare.
you'll like the gains though.
Posting Guru
Joined: Feb 2011
Posts: 2,216
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From: Princeton MN
Yes! Just tilt the pump towards the passenger side of the truck about halfa dimes width at a time until it sounds like your other truck. Never turn the pumpwhile its running, shut it down loosen the nuts on the pump, tipit and tighten.
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A timing adapter is a real bug help, get an initial reading and then gives you an idea of how much is needed to move to be at the correct setpoint.
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Elder User
Joined: Dec 2011
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From: Kodiak, Alaska
Well the 88 is having issues again, it is having problems with cold starts I found a leak in the fuel filter and replaced it with the one piece unit with the built in drain, blead the air out started it up drove it up to washington to pick up a trailer hauled great, it sat for a couple of days went to start wouldn't start pluged it in for 2 hours started right up. I think my GP's are toast if my timing is too advanced will it fry my GP's?
Posting Guru
Joined: Feb 2011
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From: Princeton MN
Well the 88 is having issues again, it is having problems with cold starts I found a leak in the fuel filter and replaced it with the one piece unit with the built in drain, blead the air out started it up drove it up to washington to pick up a trailer hauled great, it sat for a couple of days went to start wouldn't start pluged it in for 2 hours started right up. I think my GP's are toast if my timing is too advanced will it fry my GP's?
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