Can I fire up without sensors plugged in?
Thread Starter
Registered User
Joined: Jan 2003
Posts: 290
From: New Jersey
Can I fire up without sensors plugged in?
I just put in my new opti - don't have the water pump installed yet and I want to fire up and make sure I run OK. Do I have to reconnect the MAF, IAT, etc, etc? Or will she start and run without all of that stuff connected?
Registered User
Joined: Aug 2002
Posts: 4,676
From: Melvindale, MI, US
go ahead, may crank slightly longer without a MAF, but as long as the opti, coil, plug wires, TPS, IAC, MAP and injectors are hooked up, it will start
Administrator
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
At least connect the harness to the coolant temp sensor, even if its not installed in the water pump. If it is left unconnected, the PCM will interpret it as -40*F and set an extremley rich cold start mixture. You can do the same thing with the IAT sensor. Just plug it into the harness. IAT doesn't have that much affect one way or the other, though.
Thread
Thread Starter
Forum
Replies
Last Post
Drtryder
LT1 Based Engine Tech
10
Apr 22, 2015 04:17 PM
grabbem88
LT1 Based Engine Tech
23
Mar 18, 2015 01:25 PM