Did a search but...
Thread Starter
Member
Joined: Aug 2001
Posts: 418
Likes: 0
From: Sidney, B.C., Canada
Car: 88 T/A
Engine: 305
Transmission: 700R4
Did a search but...
I couldn't find out if the 165 ECM uses ign. timing to smooth out the idle?
mine jumps all over the place at idle and at part throttle, except when I unhook the est connector.
Is this normal?
Thanks in advance, Jeff.
mine jumps all over the place at idle and at part throttle, except when I unhook the est connector.
Is this normal?
Thanks in advance, Jeff.
Member
Joined: Mar 2001
Posts: 323
Likes: 1
From: CLIMAX, GA. USA
Car: 1972 LT1 Corvette
Engine: 350 HO
Transmission: M22 Heavy Duty 4 Spd
Axle/Gears: 336
Yes, it is normal. Unplugging the cable is like plugging the vacuum hose on older vehicles. The timing control is removed from the ECM. When plugged in the ECM is controlling the timing based on engine temp, rpm and many other factors.
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HoosierinWA
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Oct 7, 2015 10:15 AM