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About right Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Tue, 21 Jun 2005 05:25:15
In Reply to: inlet air temp sensor readings, rhale, Mon, 20 Jun 2005 16:54:48 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Those numbers are about right - the resistance is a little low at 100F - it should be more like 1.0 to 1.3K. The 65F is right on. I don't know how accurate your 100F is - 0.8K is more like around 125F.
If the IAT were reading a bit high (reporting a higher temperature than actual), the engine control would think that there is more airflow/volume, so it would schedule more fuel. That would cause richer running under transient (acceleration) conditions.
How do the spark plugs look? Does it look like you're running rich or lean? If you're running lean, I'd keep looking for more vacuum leaks. My favorite is the charcoal canister, because you can't see it, as it is buried in the right front fender. But if you pull the right front turn signal assembly out, you can see the hoses, and make sure they're connected to the canister properly (sometimes they slip off).
The IAT sensor is pretty cheap, so replacing it isn't a terrible thing to do. Another sensor to look at is the MAP (pressure sensor) mounted on the firewall, just behind the intake manifold. Make sure the thin hose to it is in good shape.
But I'd check the spark plugs - they live in the engine, and they tell all. If you're running rich, I'd look at possibly the IAT, or maybe a weak Fuel Pressure Regulator (FPR). If just one plug is running rich, it may be a sticky fuel injector. Also, look at the metal runners where the intake manifold connects to the cylinders - the four fat tubes running to the engine on the back. Do you see black streaks on them? That's a sign that the hoses connecting the tubes to the engine may be leaking some air - the oily/gassy air coming out sticks to the tubes, and it picks up dirt. Clean them with some Windex or degreaser, and keep and eye on them - if the dirt/slime comes back, those hoses may be leaking.
posted by 192.249....
, Tue, 21 Jun 2005 05:25:15 <-- Viewing This Message, Tue, 21 Jun 2005 10:31:15, Tue, 21 Jun 2005 07:45:32
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