Date: Thu, 21 Jun 2007 20:07:05 -0700 From: yaofeng <yaofengchennospaml.com> Subject: Re: 97 9000T temperature gauge stays low
On Jun 19, 7:22 am, tobyfi...nospaml.com wrote: > On your car the temperature guage is controlled by the ECU unlike the > earlier 9000's where it is a real representation of the engine > temperature. The guage will normally sit at the 8 o'clock position > when warmed up and will not go higher unless there is a problem. > > On 19 Jun, 05:12, "bozo" <b...nospam.net> wrote: > > > > > It is slightly possible that your temperature sensor is expiring - although > > when mine went (1995 Aero), it was fine one day and the next day the gauge > > needle simply stayed down at the 'off' position - the sensor I'm referring > > to is on the transmission end of the cylinder head, and (from memory) > > somewhat below and behind the connector for the D.I. cassette but in front > > of the throttle body. There are a few other temperature sensors scattered > > around the block and head, but this one is the one that, via the trionic > > ecu, feeds the dashboard temperature gauge - in other words, if it's the > > sensor, your engine might be hotter than you think and I believe that the > > fan control may start becoming screwey also. Stupid question, but you do > > have enough coolant, yes? Assuming your car is a 5 speed and not an > > automatic, you could do a reboot on the ecu - get up to speed, step on the > > clutch and, without removing the key, switch off the engine for 10 seconds > > or so, switch it back on and let out the clutch to restart - that has seemed > > to reset and solve some peculiar issues with both my previous '91 9kT and > > also my current '95 Aero. > > > Rick > > > <Echo088...nospaml.com> wrote in message > > >news:1182211889.635591.184640nospam000hsf.googlegroups.com...> On Jun 18, 6:39 pm, "Richard" <rootnospamlhost> wrote: > > >> <Echo088...nospaml.com> wrote in message > > > >>news:1182205366.509271.31400nospam000hse.googlegroups.com... > > > >> > Driving my 97 9000T today, on this 80 degree day. I'm noticing my > > >> > temperature needle sitting about a quarter inch above the blue when > > >> > I'm going up a hill and expect the needle to be climbing a little. So > > >> > I continue to watch the needle and it stays about the same. I stop the > > >> > car and idle to build up some heat -- and the needle still doesn't > > >> > move (well, maybe a fraction of a millimeter). I shut off the ignition > > >> > and all the needles fall as usual. Start-up and the needle rises to > > >> > the same quarter inch above blue. > > > >> > I have an 82 deg. thermostat, that I'm wondering if it's stuck and > > >> > making the fan come on more than usual, or exactly what's going on. > > >> > Any thoughts on this? > > > >> Hi! > > >> Does the needle indicate a "cold" engine when you first start it? > > >> Do you have a thermometer to check the real temp of the engine? > > > >> Richard > > > > Yes, starts off in the blue and moves up to about 1/4 inch above as > > > the engine warms up (as expected) and seems to stay right there (7-o- > > > clock) while driving. Sometimes it goes lower, but since I've noticed > > > this, I can't get above that 1/4 mark no matter what I do, even > > > letting it idle after driving. > > > > I usually don't notice how often the fans come on, (my perception > > > being they always came on as the temperature rises (higher than 1/4 > > > inch above blue). But when I checked this from outside the car (where > > > I could hear clearly), they seem to be almost constantly cycling on > > > and off -- when I'm idling with the gauge reading 7-o-clock, the fan > > > is on 90% of the time. And it doesn't seem to run once I've shut the > > > ignition off. That doesn't seem normal to my recollection. Is it?- Hide quoted text - > > - Show quoted text - Yes. It is true. Starting in 95 the 9000 engine temoerature reading is not directly read from the engine. It is tempered through the ecu. SAAB made the change as a result of owner complaint that the temperature gage responded too well from start up to hot. The move was to assauge owners' concerns.
 |
 |
 |
 |
 |
