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1989 Volvo Sedan B230f EZ116k engine_won't keep running 700

posted by  volvosenior on  Mon Aug 11 22:00 CST 2014
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last visit: Tue Oct 21 21:49 CST 2014
[RELATED]

My OBD codes pop-up with 2-1-4 continuously (RPM sensor signal missing intermittently or no signal). Replaced RPM sensor three times,still the code persists. I have changed the plugs, wires, distributor & peripherals.

The engine starts but won't idle and at high RPM's misses intermittently. The engine burns very rich, and at times will back fire into the intake. Changed both fuel pumps, relay works fine. ETC is new and works. I don't think it's the FI module since the engine does start. All the vacuum hoses have been replaced.
I replaced the injectors also. I don't see any fuel in the oil. Coil is good, and with a noid light the injectors show consistent electrical power.


Been working on this issue for several months now and am at a point where I have done everything except tear the engine down to the bare block.
.
So send me any and all feedback on this issue please.
--
89-740 GLE_91-940 Sedan _98-V90 Wagon_2001Mazda626






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