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D
DSnyde34
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From
Fulton Kansas
Joined
Mar 15, 2023
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Thursday at 9:43 AM
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DSnyde34
reacted to
Ricko1966's post
in the thread
1994 454 TBI High Idle
with
Like
.
Well the way I read that I thought you recently installed a 454 crate engine. So it's an old install and this problem just started?
Sep 15, 2024
D
DSnyde34
reacted to
Ricko1966's post
in the thread
1994 454 TBI High Idle
with
Like
.
Check for vacuum leaks,leave the new IAC in but plug the old one into the harness. Put it in service mode as earlier,see if the IAC...
Sep 15, 2024
D
DSnyde34
replied to the thread
1994 454 TBI High Idle
.
Yes that is correct, the motor was installed probably around 10 years ago. I would say he has had the idle problem for a year or two...
Sep 14, 2024
D
DSnyde34
replied to the thread
1994 454 TBI High Idle
.
Thanks for the info, do you by chance know the procedure to relearn the IAC? The engine has been running fine for several years so I...
Sep 13, 2024
D
DSnyde34
reacted to
Ricko1966's post
in the thread
1994 454 TBI High Idle
with
Like
.
If the EGR was coming on at Idle it would die,not idle fast,for it to idle fast it has to be getting air somewhere. Check for vacuum...
Sep 13, 2024
D
DSnyde34
reacted to
squaredeal91's post
in the thread
1994 454 TBI High Idle
with
Like
.
correct. If plunger is all the way out and you leave wire off it should barely idle if at all. At least in my experience that's been the...
Sep 13, 2024
D
DSnyde34
reacted to
squaredeal91's post
in the thread
1994 454 TBI High Idle
with
Like
.
Another thought. Is your tps slotted or is it just one position? If it's one position and it's off on volts I'd replace it. Could also...
Sep 13, 2024
D
DSnyde34
replied to the thread
1994 454 TBI High Idle
.
Thanks for the info, The IAC is new so it hopefully isn't dirty but I will remove it and check. I am assuming that pulling the plunger...
Sep 13, 2024
D
DSnyde34
reacted to
squaredeal91's post
in the thread
1994 454 TBI High Idle
with
Like
.
Could still be iac. Other things in play like TPS could be related, I would remove the iac and clean it and pull the plunger out by hand...
Sep 13, 2024
D
DSnyde34
posted the thread
1994 454 TBI High Idle
in
Engine & Performance
.
Hey everyone, I am currently working on my dads 1994 3/4 ton chevy with a manual transmission. It has a 454 TBI crate motor in it. The...
Sep 13, 2024
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