SOURCE: timing or ecu throwing a code
easiest way to check for a broken timing belt is to look into the oil fill hole on valve cover and have someone crank engine. see if you can see the cam move. if not moving, timing belt is broken. if it is moving it is not broken but still may be off a tooth or more. at that point you will need to remove timing covers and check timing marks. these cars are very simple and you can learn alot by spending 20 bucks on a basic haynes type repair manual.
SOURCE: My 97 rodeo wont start it isn't getting spark need
Check that the wiring harness connectors attached to the ECU are firmly attached. Check the Distributor cap (assuming it has one) to ensure that the carbon rod in the roof of the cap is still intact and serviceable - it may have worn down or disintegrated.
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