Surging Idle
09-27-2004, 08:00 PM
#1
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Join Date: Sep 2004
Posts: 25
Surging Idle
I have a newly rebuilt 355 LT4 in a 96 vette and I am expierencing a surging idle but only in open loop situations as soon as it enters a closed loop the surging stops and idle stabilizes.
Mods include:
hotcam
ported heads
52mm TB
EM long tubes
30# injectors
air pump delete
cat delete
mezeirie water pump
corsa exhaust
ED Wright reprogram
Strange scan data @ idle:
OPEN LOOP:--------CLOSED LOOP:
Map 27 in/hg --------14in/hg
IAC 122 steps --------50 steps
timing 25* -----------27*
cell 16 --------------16
Any ideas on what to look for in rooting out this problem?
Mods include:
hotcam
ported heads
52mm TB
EM long tubes
30# injectors
air pump delete
cat delete
mezeirie water pump
corsa exhaust
ED Wright reprogram
Strange scan data @ idle:
OPEN LOOP:--------CLOSED LOOP:
Map 27 in/hg --------14in/hg
IAC 122 steps --------50 steps
timing 25* -----------27*
cell 16 --------------16
Any ideas on what to look for in rooting out this problem?
Last edited by 99vette; 09-27-2004 at 08:02 PM.
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