Question about 1989 Ford Thunderbird

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Fuel but no start

Ok i tried everything i checked the inirtia switch its ok.i checked fuel pump with a volt meter infinate resistance.so i pulled the tank and realised one of the connectors was dirty and cleaned.i then had no resistance to pump after .the relay has four wires going into it yellow pink red and brown.yellow is power.pink is power to pump .when i turn key on there is no power.but if i bypass relay and jump yellow and pink pump comes on.im nor sure if the relay is screwed.but i think so.not sure how to tell.anyway i wanted to hear the car run so i jumped the two.had great fuel pressure.but the car still doesent start.pulled fuel line off throttle body getting lots of gas there.but gas isnt going into carb.dump gas down carb with pop bottle and car starts fine..i was wondering if this has anything to do with the relay not being there.i am lost my friend thinkis it is the injectors.i dont think so because what are the odds of both going at the same time.i bought new fuel pump.not the prob.is there any way to check the injectors.maybe a fuse somewhere screwing me over.any suggestions will help.im leaning towrds the relay.cause the wires going to injectors are brown and red as well.and when i check with a volt meter at the relay it has less than 10 volts on the brown and red wires

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Sounds like the problem might be in the relay but before replacing that relay, check all fuses and especially any ecm fuses. Do you have a check engine light come on when you turn the key to the on position?I believe that on this vehicle there is a relay that is labeled "eec relay" this is the relay for the power to the ecm. eec stands for "electronic engine control" If this circuit is dead the fuel pump relay will not come on either, but worse than that the ecm stays dead and the injectors are not delivering the fuel to the engine even when you jump the fuel pump manually.
Check these items and make sure that the computer is getting power and I think you problem will be found.

There is a black wire with a connector like thing in it near the battery cable on the negative post make sure that this connection is good ,it is the ecm ground and the same symptoms will happen if it is not connected well.

Good luck. I hope this helps.

Posted on Apr 20, 2009

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Posted on Jan 02, 2017

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