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350 TBI questions
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<blockquote data-quote="RustyC" data-source="post: 338540" data-attributes="member: 1997"><p>The TBI ecu's use OBD1 connections at the service connector. To check codes most people use a paper clip or short length of wire to connect two of the terminals. I can't remember off hand which two to connect , google will know. OBD2 scanners won't read. </p><p>Do you know if the ECU has the chip from Howell in it? </p><p>The TBI system will run in open loop ontile the engine gets warm. That means it is not reading the O2 sensor. If you are rich on startup it is programming, restricted air to the engine, worn injectors, possibly high fuel pressure, idle air solenoid. </p><p></p><p>For what it is worth. I run the same system in my Jeep. If I dissconnect the batteries it runs really rich on startup, then as the engine warms up it goes into closed loop and reads the 02 sensor and coolant temp. and adjusts to run correctly. If I ride for a while and crank the engine a few times the system seems to work flawless after that point.</p></blockquote><p></p>
[QUOTE="RustyC, post: 338540, member: 1997"] The TBI ecu's use OBD1 connections at the service connector. To check codes most people use a paper clip or short length of wire to connect two of the terminals. I can't remember off hand which two to connect , google will know. OBD2 scanners won't read. Do you know if the ECU has the chip from Howell in it? The TBI system will run in open loop ontile the engine gets warm. That means it is not reading the O2 sensor. If you are rich on startup it is programming, restricted air to the engine, worn injectors, possibly high fuel pressure, idle air solenoid. For what it is worth. I run the same system in my Jeep. If I dissconnect the batteries it runs really rich on startup, then as the engine warms up it goes into closed loop and reads the 02 sensor and coolant temp. and adjusts to run correctly. If I ride for a while and crank the engine a few times the system seems to work flawless after that point. [/QUOTE]
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