HELP!, Won't start when hot.
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Junior Member
Joined: Nov 2000
Posts: 1
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HELP!, Won't start when hot.
My 89 5.7 TPI won't start when hot unless I unplug the coolant temperature sensor. I replaced the CTS and plug, soldered the connections. Still doing it. I'm stumped, Please help!
Supreme Member
Joined: Feb 2000
Posts: 1,416
Likes: 0
From: Johnstown, Ohio
Car: 84 Z28
Engine: 355 (fastburn heads, LT4 HOT cam)
Transmission: 700R4
Axle/Gears: 9-bolt, 3.27
Where's your base timing at?
If you have it advanced too far, it could be causing problems. I believe that when the engine is warm the computer will give it more timing then when cold, and when you unplug the CTS it doesn't know what temp it is and gives it little advance.
The engine will crank pretty hard if this is your problem.
Good Luck!
------------------
Working on:
'84 Z28 LG4 305
Added dual elec fans.
145 MPH IROC Speedo
Building 430 HP 350
using primarily GMPP parts.
Block is in shop!
Awaiting results from all 8 ASE tests.
Starting to look like the Kicker poster child!
If you have it advanced too far, it could be causing problems. I believe that when the engine is warm the computer will give it more timing then when cold, and when you unplug the CTS it doesn't know what temp it is and gives it little advance.
The engine will crank pretty hard if this is your problem.
Good Luck!
------------------
Working on:
'84 Z28 LG4 305
Added dual elec fans.
145 MPH IROC Speedo
Building 430 HP 350
using primarily GMPP parts.
Block is in shop!
Awaiting results from all 8 ASE tests.
Starting to look like the Kicker poster child!
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theshackle
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Mar 5, 2017 06:37 PM