Now I'm really frustrated...

[EHardy1971]

Originally Posted by Italian LX

Actually, a 160* thermostat can make a car run hotter because the water doesn't stay in the radiator long enough to cool off.

actually,it's right the opposite.It does'nt allow the coolant to stay in the block long enough to get up to operating temp.

[Italian LX]

Originally Posted by EHardy1971

actually,it's right the opposite.It does'nt allow the coolant to stay in the block long enough to get up to operating temp.

How would that make the car run hotter?

[EHardy1971]

Originally Posted by Italian LX

How would that make the car run hotter?

It should make it run cooler.In a EFI engine,anything cooler than 180* will keep the ECU in open loop,making it run rich,etc.What I was saying is that by running a 160* t-stat,will keep the coolant inside the block itself from getting up to temp,instead of the other way around by it not being in the radiator long enough.I tried running a 160* in mine a few years ago,and froze my ass off when the weather turned cold!

[Italian LX]

Originally Posted by EHardy1971

It should make it run cooler.In a EFI engine,anything cooler than 180* will keep the ECU in open loop,making it run rich,etc.What I was saying is that by running a 160* t-stat,will keep the coolant inside the block itself from getting up to temp,instead of the other way around by it not being in the radiator long enough.I tried running a 160* in mine a few years ago,and froze my ass off when the weather turned cold!

That may be true in the winter time, but in the summer, a 160 will actually make a car run hotter than a 180 for the reason I said earlier.

[BAD INT]

160 will not let coolant do its job and it will make it run rich bad/bad
a 160 sometimes will be perfect but very rare, 180 seems to be optimum like both of you guys are saying.most of your better balanced thermostats in stores have the bleed hole some with a ball bearing,almost all robertshaw stats have them but if yours doesnt it is well worth drilling.Drilling the tstat is an old trick and still proving itself worthfull so much they come that way now.If you have a trick aftermarket tstat housing with a plug you can remove it works very well also but is a little messy.

[QWKSNKE]

Originally Posted by Italian LX

That may be true in the winter time, but in the summer, a 160 will actually make a car run hotter than a 180 for the reason I said earlier.

yep. The thermostat will not stay closed long enough. Especially in traffic

[QWKSNKE]

Originally Posted by EHardy1971

It should make it run cooler.In a EFI engine,anything cooler than 180* will keep the ECU in open loop,making it run rich,etc.What I was saying is that by running a 160* t-stat,will keep the coolant inside the block itself from getting up to temp,instead of the other way around by it not being in the radiator long enough.I tried running a 160* in mine a few years ago,and froze my ass off when the weather turned cold!

Only times 02's are in open loop is during initial startup (90-120 seconds after cranking) and WOT

[Wickd GT]

Well, the car seems to be working fine, so far. The highest it got was 155* on the electrical autometer gauge. So I'll will change the thermostat and put a 180* on it.

Edgar

[coupe]

If you can't get it worked out Edgar, bring it up here...$20/hr for you!

[EHardy1971]

Originally Posted by QWKSNKE

Only times 02's are in open loop is during initial startup (90-120 seconds after cranking) and WOT

But does'nt the coolant temp sensor work in conjunction with the O2's,as well as the rest of the sensors? It's been awhile since I looked in my Ford fuel injection book,but I thought it was.