crossfire open/closed loop question.
Thread Starter
Melting Slicks
Joined: Apr 2002
Posts: 2,546
Likes: 0
From: Orlando FL
crossfire open/closed loop question.
Hey guys.. I have a quick question about the open/closed loop on my car. Im not positive where i heard this before, but someone told me the crossfires stay in closed loop up until the engine temperature reaches 195 degrees.. If this is true, my car only goes into open loop like three times a year. My car never gets that hot. Is this statement true? Now that im thinking of it, National Cylinder Head Exchange (Engine specialist's) told me that. I was in there having parts for my truck cleaned up, and asked a question somewhere along those lines. Thanx Guys :cheers:
Drifting
Joined: Aug 2000
Posts: 1,251
Likes: 0
Re: crossfire open/closed loop question. (quiksilver458)
There are a few things that determine when the engine goes to closed loop.One is temp.There is a sendor on the front of the passenger head.It can be purchased at various temp ranges.Mine switches at 137 degrees.
On my car I can feel it go to closed loop.I dont know if thats normal,but I can feel it.It feels like the engine died for a second.It happens after the car has run about a half mile.
On my car I can feel it go to closed loop.I dont know if thats normal,but I can feel it.It feels like the engine died for a second.It happens after the car has run about a half mile.
Burning Brakes
Joined: Feb 2002
Posts: 1,232
Likes: 10
From: Montrose Colorado
Re: crossfire open/closed loop question. (nobodyunknown)
I just observed the open- closed loop on my CF it has a 160 stat and Hyperwreck chip. I started the car in the shop and the idle was 600 rpm when the temp hit 170 the idle whent up to 800 rpm. I assumed at 170 the loop closed and added some timing advance from the ecm. The car is an automatic and was in park. Just an observation I could be wrong. 84 CF 91 ZR-1
Thread Starter
Melting Slicks
Joined: Apr 2002
Posts: 2,546
Likes: 0
From: Orlando FL
Re: crossfire open/closed loop question. (quiksilver458)
very interesting.. i guess i could fire up my car an let it idle until i see a surge in the idle.. it usually sits at 600 rpm at idle... never have seen it different, unless its real cold out (lol like 50 degrees real cold :) ) Thanx guys. i keep checking into it.
:jester
:jester
Drifting
Joined: Dec 2000
Posts: 1,851
Likes: 5
From: Liberal Kansas
Re: crossfire open/closed loop question. (quiksilver458)
Hey guys.. I have a quick question about the open/closed loop on my car. Im not positive where i heard this before, but someone told me the crossfires stay in closed loop up until the engine temperature reaches 195 degrees.. If this is true, my car only goes into open loop like three times a year. My car never gets that hot. Is this statement true? Now that im thinking of it, National Cylinder Head Exchange (Engine specialist's) told me that. I was in there having parts for my truck cleaned up, and asked a question somewhere along those lines. Thanx Guys :cheers:
In open loop the ecm has preset fuel/ignition management untill the engine temp and O2 reaches operating temperature. After going closed loop the A/F is controlled by the O2 sensor.
[Modified by Dan Plett, 5:34 PM 11/2/2002]
