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fuel issues maybe? Posted by walt [Email]  (#2707) [Profile/Gallery]
(more from walt) on Sun, 1 Aug 2010 06:23:44
In Reply to: some ideas, drupchen, Sat, 31 Jul 2010 17:14:41 Members do not see ads below this line. - Help Keep This Site Online - Signup |
If you have put fuel injector cleaner in the tank recently, fueled with E85 by mistake, or filled up with bad gas or high detergent gas when you normally use less expensive grades, deposits may have been loosened from fuel system and plugged the fuel injectors. Car can run when cold, but dies when the NTC coolant sensor between intakes for cylinders 2 and 3 tells engine computer to restrict the fuel injector opening times causing too lean a fuel mixture. Can confirm this by getting a 2400 ohm (normal reading at 70F) 1/4-watt resistor at RadioShack and plugging it into wire harness for NTC coolant sensor. If engine doesn't die running on the resistor after it warms up, the injectors most likely are plugged. Another test with a digital voltmeter is to peel back boot on black wire on oxygen sensor while still connected to thick green wire. This connector is located just forward of cabin air intake inside hood on passenger side. After engine warms up while connected to NTC sensor normally and oxygen sensor starts putting out voltage, voltmeter should fluctuate around 0.5 volts. If running lean due to plugged injectors, sensor will output zero volts. If injectors are plugged, they can be removed and sent to various places like local diesel shops or on the internet for cleaning/testing. If the car starts and runs when cold and runs when fully warmed up, but not in the 5 minutes in between, the air mass meter is suspect. This can be checked by the glow test for hot wire continuity and for an roughly 2 to 3 volt increasing signal voltage on orange wire as one increases idle from 1000 to 3000 rpm if good.
posted by 72.49.18...
, Sat, 31 Jul 2010 14:51:27, Sat, 31 Jul 2010 17:33:15, Mon, 2 Aug 2010 10:55:20, Sun, 1 Aug 2010 06:23:44 <-- Viewing This Message
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