Blown LT1 issues
#1
Blown LT1 issues
Hi guys. seems my engine holds its RPM too long. If I run it to 4K and ease off the throttle (M6 in neutral) it stays there around 4k till I come to a stop. The car is also having high idle issues. I have read everything about the IAC and issues with larger TB's; I have a 58mm BBK but it has been "fixed" How can these be realted??? I have cleaned my linkage and the inside of the TB excessively. Can this be vacum related?? I will hook up my vaccum guage on Saturday to measure. Also, the car regulary now seems to "fart"when I turn off the ignition. Nothing violent but noticable.
TIA
TIA
#2
Re: Blown LT1 issues
Originally Posted by JWS6
Hi guys. seems my engine holds its RPM too long. If I run it to 4K and ease off the throttle (M6 in neutral) it stays there around 4k till I come to a stop. The car is also having high idle issues. I have read everything about the IAC and issues with larger TB's; I have a 58mm BBK but it has been "fixed" How can these be realted??? I have cleaned my linkage and the inside of the TB excessively. Can this be vacum related?? I will hook up my vaccum guage on Saturday to measure. Also, the car regulary now seems to "fart"when I turn off the ignition. Nothing violent but noticable.
TIA
TIA
It has to unload the system of it's pressure to come down.
Do you have an unloader(pop off) ya might have to get it tuned to come back to idle.
Unburnt fuel in exhaust causing a pummmp.
Might be the map sensor or IAM not programed right.
#4
Re: Blown LT1 issues
pummmp is exactly the sound!!! So un burnt fuel in the exhaust Id like to think its something electrical BC I have not changed anything mechanical. I shouldnt have to adjust the TB idle screw cause it has been set in the past? I dont know about an unloader but I do have an ATI bypass valve.
thanks guys!
thanks guys!
#5
Re: Blown LT1 issues
Originally Posted by JWS6
pummmp is exactly the sound!!! So un burnt fuel in the exhaust Id like to think its something electrical BC I have not changed anything mechanical. I shouldnt have to adjust the TB idle screw cause it has been set in the past? I dont know about an unloader but I do have an ATI bypass valve.
thanks guys!
thanks guys!
I build um and let my computer guy tune and push the right button's.
Before ya start throwing parts at it maybe somebody like Madwolf or Injuneer or someone that does it for a living,can chime in and put ya on the right track.
The bypass is the unloader.It relieves system pressure when the TB is closed(from reving back to idle) to relieve pressure on the blower.
Have ya talked to ProCharger?
Last edited by 1racerdude; 07-01-2005 at 11:30 AM.
#7
Re: Blown LT1 issues
I just got a guage from a buddy the ther day. where do you guys tap into the intake to hook it up for boost?? Seems every place is taken. I would use the hole on the drivers side but its being used for the bypass valve? I dont have a logger so here I am.......
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