3.1 6 cyl car runs rough has hesitation when accelerating from stop also back fires while trying to start when engine is warm. Let it set for a while it starts up but still doesn't run smooth then wants to die after warm up..
SOURCE: 93 chevy lumina euro won't stay running
sounds like it could be a fuel injector shorting out. have to get it hot, pull off the plenum and check the resistance in each injector. if any injector has bad resistance, replace it. when an injector shorts out on these particular vehicles, it shorts out the whole injection circuit. and when it cools off the resistance goes back up and it will run ok. i think the correct resistance should be about 13 ohms.
SOURCE: 1994 GMC Jimmy engine runs rough when cold; smooths out when warm
you need to have the codes checked to know what direction to start repairs,Autozone does this for free
SOURCE: when cold my 93 chevy rbenjamin harrisonuns rough
give a good tune up. if it still is acting up let me know
SOURCE: my 93 is hesitating when accelerating
The problem was worsening so I took it to the dealer and they recommended a tune up and throttle body cleaning. Also I needed plug wires and a rotter and something else ans this should correct the problem. Hope to use you in the future.
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