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First rule - assume multiple problems Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Sun, 5 Jul 2009 19:13:56
In Reply to: 98 CSE acting up..., keith 85spg, Sun, 5 Jul 2009 18:08:16 Members do not see ads below this line. - Help Keep This Site Online - Signup |
It's a new to you car, so don't assume every probolem you see has the same cause. Your best bet is to troubleshoot them one at a time, and go from there. If you fix one thing and they all are resolved, great.
In a '98, the radiator fan is controlled by the relay, which is controlled by the Trionic. So if the fan is stuck on, it's either because the Trionic is commanding it on, or the relay is sticking. I'd go after the relay, because it's easier to troubleshoot than the Trionic. The Trionic shouldn't keep the fan on after the key is turned off. Pull the relay, and pop off the cover. Look at the relay contacts; if they look reallyy pitted, consider replacing it. Clean the contacts with a little fine sandpaper or an emery board.
As to the ACC - always cold can be a few things. First, re-calibrate the ACC - with the engine running, press the VENT and AUTO buttons at the same time - (upper left, lower right). See if you feel the temp go from cold to warm. The ACC display should show 0, and go to the temperature you set before the recal- if you get a number other than 0 or the temperature (like 1, or 2), it's the sign of a fault in the ACC system.
Assuming no faults, open the hood and remove the horizontal panel at the base of the windshield. On the passenger side (US cars) of the heater box you'll see an arm with a wire on it that goes into the firewall. The wire should be on the arm; nothing broken. Have someone move the ACC temp from LO to HI. The wire should move the arm from forward (LO) to back/aft (HI). If the wire isn't moving, it could be the ACC servo in the dash. Grab the wire and gently try to push/pull on it - if you can easily move it, the wire has fallen off the servo. Easy to access - just pop the ACC unit out of the dash and reach in through the hole.
You said that the ACC was cold independent of temperature - does it get hot if you go to HI? If it gets hot with HI, but not at any other temperature, then I'd suspect the sensor in the dash (looks like a bulls-eye). The fan in the sensor could be bad.
Frost on the fat hose from the AC compressor means it's humid outside. The fat hose is the cold side, and it'll frost up if there is moisture in the air. Normal. There is an anti-freeze sensor on the evaporator in the dash, but not for the hose.
High idle - Nope, no AMM. But there is an AIC. That could be bad/sticky. A vacuum leak could cause a similar problem. It might be as simple as a bad gas cap gasket. Since it's an OBDII car, you can read out the codes. If you don't have an OBDII code reader, get yourself to a Pep Boys, Napa Auto, or other autoparts store, and see if they'll lend you a code reader - most places do. Read out the code(s) and come back. Don't assume that the code will point directly to a bad part.
posted by 192.249.47...
, Mon, 6 Jul 2009 12:40:39, Sun, 5 Jul 2009 19:13:56 <-- Viewing This Message
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