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Post by 79turbostang on Aug 17, 2009 23:38:33 GMT -5
OK I have a 79 mustang with a 87Tc motor in it. Ive been having problems left and right with getting the motor running right. The problem I'm having now it that the motor wont idle if i hold the gas around 2000 RPM it runs OK but has a little miss to the engine,and will back fire once every 15 or 20 sec but its not loud. When I let off the gas completely the motor will run fine for about 5 sec. The cam and crank timing is dead on the flue pressure is 35psi new plugs wires distributor cap and rotor. the only thing i came up with is that I'm running a 85Tc mass air flow sensor instead of a 87 could that be the problem... any suggestions would help to give me a start on what to do
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Post by 93stangnow23t on Aug 17, 2009 23:43:03 GMT -5
the sensor is most likely your problem depending on the ECU your running if its an 87-88 ecu then yes thats your problem.
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Post by Stinger on Aug 18, 2009 2:23:54 GMT -5
The ecu requires you to run the matching vam (not mass air) and injectors. An 87 TC ecu requires you to use brown top 35lb injectors and a large vam, failure to do so will create a number of problems.
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Post by 79turbostang on Aug 18, 2009 18:41:53 GMT -5
thanks guys ill try to scratch one up. the only thing is that i lost my job and there not that cheap from autozone but ill try that and see what happends
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Post by Stinger on Aug 18, 2009 19:06:02 GMT -5
Get one used from eBay or the wanted section on here, they typically bring 30-40 shipped used.
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Post by 79turbostang on Aug 18, 2009 23:28:09 GMT -5
OK i just went out side and looked at my injectors and they are brown tops. i am running a 87 ecu
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