Ive been working on my friends grandmas 99 taurus with 3.0 OHV
, its having an intermittent starting issue, heres a quick summary
turn key to on position, fuel pump primes just fine.
as soon as you turn the key to the on position, the service engine soon light comes on (after a verrrrry short flash off) and remains on. very similar to the check engine light in a obd1 honda, the light comes on while pump is priming, then it turns off with a click and remains off (in a honda if the check engine light remains on that means the main relay isn't giving power to the ecu- common problem).
The theft light is not on.
while cranking the motor the service engine light stays on, you can crank the engine from anywhere from 5-30 seconds, but as soon as the service engine soon light turns off, the car fires right up.
The tach doesnt bounce while cranking. The crank position sensor is new.
Ive gotten so far into it to check the timing chain to see if it jumped time, timing chain is fine, timing marks all line up, i then re-set the camshaft sensor using the proper alignment tool.
sensor (top of cam sensor) is also new.
When i took on the job it was supposedly a "bad ecu" case
Does this sound familiar to anyone? as far as the service engine soon light turning off while cranking, then it the car fires up?
Any help would be appreciated, fuel pump is fine.
The car throws DTC
in the scan tool, but the indicator on the dash doesn't illuminate.
p0352 coil b primary/secondary
p0351 coil a primary/secondary
p0353 coil c primary/secondary
The coil pack(s) are new, along with CMP
position sensor and crank sensor.
the car does run and drive when it does start, and will run for up to 45 min. it does not mis-fire but does run a bit rough and lacks power, its hard to say how much because i never drove the car in good running condition.